Riccardo Ricceri - Academia.edu (original) (raw)
Papers by Riccardo Ricceri
Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals (CD-ROM), Feb 1, 2000
Abstract The X-ray structure of 1-(N-ethyl-1-sulphonate-4-pyridinio)-2-[N-methylpyrrol-2-yl]ethen... more Abstract The X-ray structure of 1-(N-ethyl-1-sulphonate-4-pyridinio)-2-[N-methylpyrrol-2-yl]ethene · H2O is reported. The molecule belongs to the spatial group P21/n with unit cell constants a = 6.841(5), b = 21.259(5), c=10.195(5), β=110.262(15)°. The compound was characterized by means of UV-vis and steady-state fluorescence spectroscopies. In the visible region the powder shows a blue shift of the main absorption band with respect to the solution. Analogously a marked red shift and decrease of intensity is observed in the fluorescence spectra. Packing effects are most likely at the origin of the difference. The molecule is expected to have promising proprieties for two-photon pumped (TPP) frequency-upconversion lasing experiments.
Journal of Applied Biomaterials & Biomechanics, Sep 1, 2003
This study concerns a novel powder metallurgy method for producing porous titanium (pTi) exhibiti... more This study concerns a novel powder metallurgy method for producing porous titanium (pTi) exhibiting high mechanical properties. The preparation procedure consisted of the following stages: first, the preparation of Ti and titanium hydride (TiH2) powder mixtures and their consolidation with a cold isostatic press, followed by a sintering of the green bodies performed with hot isostatic press (HIP) equipment. Thermal decomposition in controlled environment of the TiH2 phase results in the foam structure. The resulting porosity percolates with a volume fraction of approximately 20%. The final material exhibits interesting mechanical properties, comparable to those of full density titanium (between grade 2 and grade 3), with the advantage of a minor density. The samples produced were tested to verify their biological response by studying the effectiveness of osteoblast adhesion and growth. In this preliminary study, osteoblastic cell morphology was investigated and compared to that observed on fully dense commercially pure titanium (Ti-cp) (ASTM, grade 3). The preliminary results were promising regarding cellular adhesion and spreading. (Journal of Applied Biomaterials & Biomechanics 2003; 1: 172-7).
Steinkopff eBooks, Dec 10, 2007
Langmuir, Feb 27, 1999
We investigated the aggregation of the pyridinium-dicyanomethanide dye 4-[5-(dicyanomethanido)thi... more We investigated the aggregation of the pyridinium-dicyanomethanide dye 4-[5-(dicyanomethanido)thien-2-yl]-N-(n-hexadecyl)pyridinium (C16H33-PDCNT), in transferred films obtained with the Langmuir-Blodgett (LB) technique; this behavior is an example for the formation of H* aggregates, which show strongly blue-shifted and sharp electronic absorption bands. Surface pressure-area isotherms are reported at T) 291 K. LB films were investigated by UV-vis spectroscopy and optical and atomic force microscopy in order to obtain information about the molecular structure of the aggregates. The molecule strongly absorbs in the visible region because of a charge-transfer band; the sharp peak at 422 nm is attributed to the formation of H* aggregates. Figure 4. AFM images of LB films of 1 (7 layers) with different scan sizes: (a) 17 × 17 µm 2 ; (b) 5 × 5 µm 2 ; (c) 1350 × 1350 nm 2 ; (d) 548 × 548 nm 2. Part d is a 3D representation of AFM data.
Langmuir, Jun 1, 1997
We report on Langmuir-Blodgett (LB) characterization of 4-[5-(dicyanomethanidyl)thien-2-yl]-Ncety... more We report on Langmuir-Blodgett (LB) characterization of 4-[5-(dicyanomethanidyl)thien-2-yl]-Ncetylpyridinium (C16H33-PDCNT). Surface pressure-area isotherms of monolayers were investigated at T) 291 K. LB films of Y-and Z-type were characterized by means of UV-vis and FTIR spectroscopies. The compound is photobleachable and undergoes a change in molecular structure in monolayer and in solution. The molecule strongly absorbs in the visible region due to a charge transfer band both in homogeneous solution and LB films. Depending upon dipping conditions, a sharp absorption band appears at about 422 nm that could be attributed to molecular aggregates, probably of H-type. Both the 422 nm band and the broad charge transfer band at longer wavelength are photobleachable, and the former could have potential applications for optical data storage. The molecule seems to possess a large second-order hyperpolarizability, and non-centrosymmetric Z-type LB films could have promising nonlinear optical properties.
Langmuir, Oct 1, 1997
... [ChemPort]. (19) Emerson, ES; Conlin, MA; Rosenoff, AE; Norland, KS; Rodriguez, H.; Chin, D .... more ... [ChemPort]. (19) Emerson, ES; Conlin, MA; Rosenoff, AE; Norland, KS; Rodriguez, H.; Chin, D ... Atindra D. Shukla, David Strawser, Andre CB Lucassen, Dalia Freeman, Hagai Cohen, D. Amilan Jose, Amitava Das, Guennadi Evmenenko, Pulak Dutta, and Milko E. van der Boom. ...
Colloids and Surfaces A: Physicochemical and Engineering Aspects, May 1, 1999
We report on Langmuir-Blodgett (LB) films characterization of 4-[5-dicyanomethanido)thien-2-y1]-N... more We report on Langmuir-Blodgett (LB) films characterization of 4-[5-dicyanomethanido)thien-2-y1]-N-(n-hexadecyl)pyridinium (C 16 H 33-PDCNT), and 1-(N-(n-hexadecy]-4-pyridinio)-2-[5-(dicyanomethanido)thien-2-yl]ethene (C 16 H 33-PDCNTE); LB films of the pure compounds and of the mixtures of the two compounds were prepared at 291 K: UV-vis investigation revealed the presence of photobleachable absorption bands, the ones at about 530 nm and 640 nm were due to charge transfer transitions of the monomer of C 16 H 33-PDCNT and C 16 H 33-PDCNTE, respectively; the sharp, photobleachable ones shifted to shorter wavelengths were due to H-aggregates of the two compounds. By changing the molar ratios of the two compounds in the mixtures and in other cases by annealing the LB films, the absorption maxima of the sharp, photobleachable bands due to H-aggregates could be tuned in the range 415-467 nm. These LB films are thus very promising in view of optical data storage applications.
Langmuir, 1996
ABSTRACT The behavior of 2-(docosylamino)-5-nitropyridine (DCANP) spreading monolayers was invest... more ABSTRACT The behavior of 2-(docosylamino)-5-nitropyridine (DCANP) spreading monolayers was investigated as a function of temperature, pH, and subphase composition. The interactions of DCANP monolayers with copper ions dissolved into the subphase at different concentrations were also studied. The investigations were carried out by measuring surface pressure and surface potential-area isotherms. Langmuir-Blodgett (LB) films transferred from pure water and, copper aqueous subphases were also studied by Fourier transform infrared (FTIR), UV-vis, and electron paramagnetic resonance (EPR) spectroscopies, X-ray photoelectron spectroscopy (XPS), ellipsometry, and refractive index measurements. The interactions between copper ions and DCANP molecules were investigated by means of various techniques in the bulk phase, in monolayers, and in LB films. Clear evidence of interactions between DCANP and copper ions was provided only from EPR spectroscopy in the LB films, because of the very small molar ratio of bound/free DCANP in the LB films. The refractive index of Cu-doped LB films was shown to be increased by the presence of metal ions.
Materials Science and Engineering: C, Feb 1, 1998
Nonlinear optics has recently developed from a purely basic discipline to a number of research fi... more Nonlinear optics has recently developed from a purely basic discipline to a number of research fields focused on potential applications. One fundamental requirement is the impleinentation of future devices utilizing waveguides. Limiting us to organic materials, this demands the fabrication of homogeneous and hopefully oriented thin films. Here our activity on organic guides with interesting X ~-> or X ~3) nonlinear properties is reported. In particular, four layer guides (FLGs) including 2-docosylamino-5-nitropyridine (DCANP) Langmuir-Blodgett (LB) films have been realized and used to perform electro-optic tests. A measurement of the Pockel's r= coefficient gave a value greater than i / 10 of the r33 coefficient of LiNbO> In the case of)t" ~ materials, both LB and spun films have been fabricated. In particular, LB films of poly-3BCMU show a higher degree of conjugation as proved by visible and resonance Raman spectra. This is a straightforward consequence of their ordered structure. In the case of spun fihns, the reduced conjugation is compensated by relatively easy fabrication and by guide losses as low as 3 dB cm-i at 1300 nm. Devices based on tapered FLGs were realized to insert polymer films in glass integrated circuits. Moreover nonlinear tests performed by using the propagation at)t = 1064 nm gave a value of'x '~) = 3 × I0-]9 m 2 V-2.
Applied Physics Letters, Feb 23, 1998
Thin Solid Films, Feb 1, 1999
Mixed Langmuir±Blodgett (LB) ®lms of two novel thiophene-spaced N-alkylpyridinium malononitrile z... more Mixed Langmuir±Blodgett (LB) ®lms of two novel thiophene-spaced N-alkylpyridinium malononitrile zwitterionic dyes have been prepared. The LB ®lms present two sharp, non-overlapping charge-transfer absorption bands which can be selectively photobleached in a irreversible fashion. The former could have potential application in multifrequency optical data storage.
The effectiveness of some commercial dispersing agents employed for optimising the solid loading ... more The effectiveness of some commercial dispersing agents employed for optimising the solid loading of kaolin suspensions was evaluated. Two commercial deflocculants were employed: a 4,5-dihydroxy-1,3-benzenedisulfonic acid, disodium salt and a sodium polyacrylate. Rheological tests were carried out at 25±0.1°C by using the rate controlled coaxial cylinder viscometer Rotovisko-Haake 20, system M5-osc., measuring device MV1P with serrated surfaces. The tests were performed under both continuous and oscillatory flow conditions. In the case of the polyacrylate, a shearthickening (rheopectic) behaviour has been noticed above a critical dispersant concentration before attaining the stabilization of the dispersion. pH measurements were accomplished in order to clarify the mechanism of particle stabilization. The sodium polyacrylate proved to be more effective as dispersant for kaolin suspensions.
Silicates industriels, 2005
The influence of the addition of three commercially available superplasticizers employed for maxi... more The influence of the addition of three commercially available superplasticizers employed for maximising the solid loading of Portland cement pastes has been investigated. Cement pastes were prepared from deionized water and a commercial ordinary Portland cement ...
International Journal of Powder Metallurgy, 2003
Titanium displaying attractive mechanical properties has been obtained with a porosity of ∼20 v/o... more Titanium displaying attractive mechanical properties has been obtained with a porosity of ∼20 v/o utilizing a new powder metallurgy process. A mix of powders of titanium and TiH2 is compacted by cold isostatic pressing and the green compact consolided by hot isostatic pressing. Subsequently the material is foamed to produce a cellular porosity with TiH2 functioning as the foaming agent. The porous titanium exhibits mechanical properties similar to those reported for fully dens titanium.
Spreading phopholipid monolayers at the water-air interface were used as model membrane systems i... more Spreading phopholipid monolayers at the water-air interface were used as model membrane systems in order to investigate the effect of a large ionophore molecule on the interactions between two photo-induced electron transfer. partners. We therefore studied monolayers containing the covalently bound donor (pyrene) diluted in a matrix phospholipid where valinomycin was also embedded. We studied the interactions of a water
Langmuir, 1996
The aggregation energies of prolate and oblate ellipsoidal neutral micelles in a binary oil/water... more The aggregation energies of prolate and oblate ellipsoidal neutral micelles in a binary oil/water system were calculated by using a semiempirical model. The interactions among the polar heads of the amphiphilic molecules at the micelle interface were evaluated via a central potential of the Lennard−Jones 6−12 type. The interactions among the hydrophobic chains in the micelle bulk were evaluated via a phenomenological model. The results, which refer only to micelles of low eccentricity, show that the prolate and oblate micelles of equal volumes (containing the same number of molecules) have approximately the same aggregation energies.
Journal of the European Ceramic Society, 2003
The formation of lithium ferrites (LiFe5O8 and LiFeO2) from mechanically activated mixtures of Li... more The formation of lithium ferrites (LiFe5O8 and LiFeO2) from mechanically activated mixtures of Li2CO3–Fe2O3 has been studied using thermal analysis (TGA, DSC), evolved gas analysis (TG/FT-IR), X-ray powder diffraction (XRD), scanning electron microscopy (SEM) ...
Le Journal de Physique IV, 2001
Porous materials are needed for the development of new surgical implants where reliable implant-t... more Porous materials are needed for the development of new surgical implants where reliable implant-to-bone fixation is accomplished. Here we report a method based an P/M technology to obtain titanium alloys with controlled porosity and good mechanical properties due to the use of nanocrystalline powders, with means of the traditional sintering techniques combined with hot isostatic pressing (HIP).
Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals (CD-ROM), Feb 1, 2000
Abstract The X-ray structure of 1-(N-ethyl-1-sulphonate-4-pyridinio)-2-[N-methylpyrrol-2-yl]ethen... more Abstract The X-ray structure of 1-(N-ethyl-1-sulphonate-4-pyridinio)-2-[N-methylpyrrol-2-yl]ethene · H2O is reported. The molecule belongs to the spatial group P21/n with unit cell constants a = 6.841(5), b = 21.259(5), c=10.195(5), β=110.262(15)°. The compound was characterized by means of UV-vis and steady-state fluorescence spectroscopies. In the visible region the powder shows a blue shift of the main absorption band with respect to the solution. Analogously a marked red shift and decrease of intensity is observed in the fluorescence spectra. Packing effects are most likely at the origin of the difference. The molecule is expected to have promising proprieties for two-photon pumped (TPP) frequency-upconversion lasing experiments.
Journal of Applied Biomaterials & Biomechanics, Sep 1, 2003
This study concerns a novel powder metallurgy method for producing porous titanium (pTi) exhibiti... more This study concerns a novel powder metallurgy method for producing porous titanium (pTi) exhibiting high mechanical properties. The preparation procedure consisted of the following stages: first, the preparation of Ti and titanium hydride (TiH2) powder mixtures and their consolidation with a cold isostatic press, followed by a sintering of the green bodies performed with hot isostatic press (HIP) equipment. Thermal decomposition in controlled environment of the TiH2 phase results in the foam structure. The resulting porosity percolates with a volume fraction of approximately 20%. The final material exhibits interesting mechanical properties, comparable to those of full density titanium (between grade 2 and grade 3), with the advantage of a minor density. The samples produced were tested to verify their biological response by studying the effectiveness of osteoblast adhesion and growth. In this preliminary study, osteoblastic cell morphology was investigated and compared to that observed on fully dense commercially pure titanium (Ti-cp) (ASTM, grade 3). The preliminary results were promising regarding cellular adhesion and spreading. (Journal of Applied Biomaterials & Biomechanics 2003; 1: 172-7).
Steinkopff eBooks, Dec 10, 2007
Langmuir, Feb 27, 1999
We investigated the aggregation of the pyridinium-dicyanomethanide dye 4-[5-(dicyanomethanido)thi... more We investigated the aggregation of the pyridinium-dicyanomethanide dye 4-[5-(dicyanomethanido)thien-2-yl]-N-(n-hexadecyl)pyridinium (C16H33-PDCNT), in transferred films obtained with the Langmuir-Blodgett (LB) technique; this behavior is an example for the formation of H* aggregates, which show strongly blue-shifted and sharp electronic absorption bands. Surface pressure-area isotherms are reported at T) 291 K. LB films were investigated by UV-vis spectroscopy and optical and atomic force microscopy in order to obtain information about the molecular structure of the aggregates. The molecule strongly absorbs in the visible region because of a charge-transfer band; the sharp peak at 422 nm is attributed to the formation of H* aggregates. Figure 4. AFM images of LB films of 1 (7 layers) with different scan sizes: (a) 17 × 17 µm 2 ; (b) 5 × 5 µm 2 ; (c) 1350 × 1350 nm 2 ; (d) 548 × 548 nm 2. Part d is a 3D representation of AFM data.
Langmuir, Jun 1, 1997
We report on Langmuir-Blodgett (LB) characterization of 4-[5-(dicyanomethanidyl)thien-2-yl]-Ncety... more We report on Langmuir-Blodgett (LB) characterization of 4-[5-(dicyanomethanidyl)thien-2-yl]-Ncetylpyridinium (C16H33-PDCNT). Surface pressure-area isotherms of monolayers were investigated at T) 291 K. LB films of Y-and Z-type were characterized by means of UV-vis and FTIR spectroscopies. The compound is photobleachable and undergoes a change in molecular structure in monolayer and in solution. The molecule strongly absorbs in the visible region due to a charge transfer band both in homogeneous solution and LB films. Depending upon dipping conditions, a sharp absorption band appears at about 422 nm that could be attributed to molecular aggregates, probably of H-type. Both the 422 nm band and the broad charge transfer band at longer wavelength are photobleachable, and the former could have potential applications for optical data storage. The molecule seems to possess a large second-order hyperpolarizability, and non-centrosymmetric Z-type LB films could have promising nonlinear optical properties.
Langmuir, Oct 1, 1997
... [ChemPort]. (19) Emerson, ES; Conlin, MA; Rosenoff, AE; Norland, KS; Rodriguez, H.; Chin, D .... more ... [ChemPort]. (19) Emerson, ES; Conlin, MA; Rosenoff, AE; Norland, KS; Rodriguez, H.; Chin, D ... Atindra D. Shukla, David Strawser, Andre CB Lucassen, Dalia Freeman, Hagai Cohen, D. Amilan Jose, Amitava Das, Guennadi Evmenenko, Pulak Dutta, and Milko E. van der Boom. ...
Colloids and Surfaces A: Physicochemical and Engineering Aspects, May 1, 1999
We report on Langmuir-Blodgett (LB) films characterization of 4-[5-dicyanomethanido)thien-2-y1]-N... more We report on Langmuir-Blodgett (LB) films characterization of 4-[5-dicyanomethanido)thien-2-y1]-N-(n-hexadecyl)pyridinium (C 16 H 33-PDCNT), and 1-(N-(n-hexadecy]-4-pyridinio)-2-[5-(dicyanomethanido)thien-2-yl]ethene (C 16 H 33-PDCNTE); LB films of the pure compounds and of the mixtures of the two compounds were prepared at 291 K: UV-vis investigation revealed the presence of photobleachable absorption bands, the ones at about 530 nm and 640 nm were due to charge transfer transitions of the monomer of C 16 H 33-PDCNT and C 16 H 33-PDCNTE, respectively; the sharp, photobleachable ones shifted to shorter wavelengths were due to H-aggregates of the two compounds. By changing the molar ratios of the two compounds in the mixtures and in other cases by annealing the LB films, the absorption maxima of the sharp, photobleachable bands due to H-aggregates could be tuned in the range 415-467 nm. These LB films are thus very promising in view of optical data storage applications.
Langmuir, 1996
ABSTRACT The behavior of 2-(docosylamino)-5-nitropyridine (DCANP) spreading monolayers was invest... more ABSTRACT The behavior of 2-(docosylamino)-5-nitropyridine (DCANP) spreading monolayers was investigated as a function of temperature, pH, and subphase composition. The interactions of DCANP monolayers with copper ions dissolved into the subphase at different concentrations were also studied. The investigations were carried out by measuring surface pressure and surface potential-area isotherms. Langmuir-Blodgett (LB) films transferred from pure water and, copper aqueous subphases were also studied by Fourier transform infrared (FTIR), UV-vis, and electron paramagnetic resonance (EPR) spectroscopies, X-ray photoelectron spectroscopy (XPS), ellipsometry, and refractive index measurements. The interactions between copper ions and DCANP molecules were investigated by means of various techniques in the bulk phase, in monolayers, and in LB films. Clear evidence of interactions between DCANP and copper ions was provided only from EPR spectroscopy in the LB films, because of the very small molar ratio of bound/free DCANP in the LB films. The refractive index of Cu-doped LB films was shown to be increased by the presence of metal ions.
Materials Science and Engineering: C, Feb 1, 1998
Nonlinear optics has recently developed from a purely basic discipline to a number of research fi... more Nonlinear optics has recently developed from a purely basic discipline to a number of research fields focused on potential applications. One fundamental requirement is the impleinentation of future devices utilizing waveguides. Limiting us to organic materials, this demands the fabrication of homogeneous and hopefully oriented thin films. Here our activity on organic guides with interesting X ~-> or X ~3) nonlinear properties is reported. In particular, four layer guides (FLGs) including 2-docosylamino-5-nitropyridine (DCANP) Langmuir-Blodgett (LB) films have been realized and used to perform electro-optic tests. A measurement of the Pockel's r= coefficient gave a value greater than i / 10 of the r33 coefficient of LiNbO> In the case of)t" ~ materials, both LB and spun films have been fabricated. In particular, LB films of poly-3BCMU show a higher degree of conjugation as proved by visible and resonance Raman spectra. This is a straightforward consequence of their ordered structure. In the case of spun fihns, the reduced conjugation is compensated by relatively easy fabrication and by guide losses as low as 3 dB cm-i at 1300 nm. Devices based on tapered FLGs were realized to insert polymer films in glass integrated circuits. Moreover nonlinear tests performed by using the propagation at)t = 1064 nm gave a value of'x '~) = 3 × I0-]9 m 2 V-2.
Applied Physics Letters, Feb 23, 1998
Thin Solid Films, Feb 1, 1999
Mixed Langmuir±Blodgett (LB) ®lms of two novel thiophene-spaced N-alkylpyridinium malononitrile z... more Mixed Langmuir±Blodgett (LB) ®lms of two novel thiophene-spaced N-alkylpyridinium malononitrile zwitterionic dyes have been prepared. The LB ®lms present two sharp, non-overlapping charge-transfer absorption bands which can be selectively photobleached in a irreversible fashion. The former could have potential application in multifrequency optical data storage.
The effectiveness of some commercial dispersing agents employed for optimising the solid loading ... more The effectiveness of some commercial dispersing agents employed for optimising the solid loading of kaolin suspensions was evaluated. Two commercial deflocculants were employed: a 4,5-dihydroxy-1,3-benzenedisulfonic acid, disodium salt and a sodium polyacrylate. Rheological tests were carried out at 25±0.1°C by using the rate controlled coaxial cylinder viscometer Rotovisko-Haake 20, system M5-osc., measuring device MV1P with serrated surfaces. The tests were performed under both continuous and oscillatory flow conditions. In the case of the polyacrylate, a shearthickening (rheopectic) behaviour has been noticed above a critical dispersant concentration before attaining the stabilization of the dispersion. pH measurements were accomplished in order to clarify the mechanism of particle stabilization. The sodium polyacrylate proved to be more effective as dispersant for kaolin suspensions.
Silicates industriels, 2005
The influence of the addition of three commercially available superplasticizers employed for maxi... more The influence of the addition of three commercially available superplasticizers employed for maximising the solid loading of Portland cement pastes has been investigated. Cement pastes were prepared from deionized water and a commercial ordinary Portland cement ...
International Journal of Powder Metallurgy, 2003
Titanium displaying attractive mechanical properties has been obtained with a porosity of ∼20 v/o... more Titanium displaying attractive mechanical properties has been obtained with a porosity of ∼20 v/o utilizing a new powder metallurgy process. A mix of powders of titanium and TiH2 is compacted by cold isostatic pressing and the green compact consolided by hot isostatic pressing. Subsequently the material is foamed to produce a cellular porosity with TiH2 functioning as the foaming agent. The porous titanium exhibits mechanical properties similar to those reported for fully dens titanium.
Spreading phopholipid monolayers at the water-air interface were used as model membrane systems i... more Spreading phopholipid monolayers at the water-air interface were used as model membrane systems in order to investigate the effect of a large ionophore molecule on the interactions between two photo-induced electron transfer. partners. We therefore studied monolayers containing the covalently bound donor (pyrene) diluted in a matrix phospholipid where valinomycin was also embedded. We studied the interactions of a water
Langmuir, 1996
The aggregation energies of prolate and oblate ellipsoidal neutral micelles in a binary oil/water... more The aggregation energies of prolate and oblate ellipsoidal neutral micelles in a binary oil/water system were calculated by using a semiempirical model. The interactions among the polar heads of the amphiphilic molecules at the micelle interface were evaluated via a central potential of the Lennard−Jones 6−12 type. The interactions among the hydrophobic chains in the micelle bulk were evaluated via a phenomenological model. The results, which refer only to micelles of low eccentricity, show that the prolate and oblate micelles of equal volumes (containing the same number of molecules) have approximately the same aggregation energies.
Journal of the European Ceramic Society, 2003
The formation of lithium ferrites (LiFe5O8 and LiFeO2) from mechanically activated mixtures of Li... more The formation of lithium ferrites (LiFe5O8 and LiFeO2) from mechanically activated mixtures of Li2CO3–Fe2O3 has been studied using thermal analysis (TGA, DSC), evolved gas analysis (TG/FT-IR), X-ray powder diffraction (XRD), scanning electron microscopy (SEM) ...
Le Journal de Physique IV, 2001
Porous materials are needed for the development of new surgical implants where reliable implant-t... more Porous materials are needed for the development of new surgical implants where reliable implant-to-bone fixation is accomplished. Here we report a method based an P/M technology to obtain titanium alloys with controlled porosity and good mechanical properties due to the use of nanocrystalline powders, with means of the traditional sintering techniques combined with hot isostatic pressing (HIP).