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Research paper thumbnail of Reactive two-step additive manufacturing of ultra-high temperature carbide ceramics

Additive manufacturing, 2023

Research paper thumbnail of Proinflammatory cytokine expression of IL-1β and TNF-α by human osteoblast-like MG-63 cells upon exposure to silicon nitride in vitro

Journal of Biomedical Materials Research, Apr 1, 2000

... Afshin Sohrabi 1,2 ,; Christof Holland 1 ,; Ricky Kue 3 ,; Dennis Nagle 3 ,; David S. Hungerf... more ... Afshin Sohrabi 1,2 ,; Christof Holland 1 ,; Ricky Kue 3 ,; Dennis Nagle 3 ,; David S. Hungerford 1 ,; Carmelita G. Frondoza 1,2,*. Article first published online: 24 JAN 2000. DOI: 10.1002/(SICI)1097-4636(200004)50:1<43::AID-JBM7>3.0.CO;2-A. Copyright © 2000 John Wiley ...

Research paper thumbnail of Selective Laser Reaction Synthesis of SiC, Si$_3$N$_4$ and HfC/SiC Composites for Additive Manufacturing

arXiv (Cornell University), Jul 29, 2022

Research paper thumbnail of Selected physical and mechanical properties of resin infused porous carbon composites made from medium density fiberboard

Forest Products Journal, 2009

Research paper thumbnail of Growth of graphite single crystals from iron-carbon solutions

Journal of Materials Science, Jul 1, 1971

Graphite crystals grown from hypereutectic solutions of carbon in iron were examined microscopica... more Graphite crystals grown from hypereutectic solutions of carbon in iron were examined microscopically with a view to establishing the mechanisms of growth. It is proposed that nucleation occurred on a second phase which had been retained in some crystals extracted from the molten solution. The perfection of the crystals, which is compared with that of naturally occurring and pyrolytic graphites, is a function of the extent of decomposition of this second phase and the impurity content of the melt.

Research paper thumbnail of Oxidation protection in carbon-carbon composites

Materials Research Bulletin, Nov 1, 1986

Research paper thumbnail of Reactive Laser Synthesis of Ultra-high-temperature Ceramics HfC, ZrC, TiC, HfN, ZrN, and TiN for Additive Manufacturing

arXiv (Cornell University), Aug 3, 2022

Research paper thumbnail of 11. Mechanisms operative in growth of graphite crystals from solution

Research paper thumbnail of 136. Glassy carbon-CVD composites

Research paper thumbnail of The anisotropy of pyrolytic graphite

Journal of Applied Crystallography, Oct 1, 1973

Research paper thumbnail of Napthalene crystals formed from propylene

Research paper thumbnail of The importance of strain in crystallite size determinations in graphite

Research paper thumbnail of Characterization of highly oriented synthetic graphites

Research paper thumbnail of Developing a Low-Cost, Ultraportable, Modular Device Platform to Improve Access to Safe Surgery

Research paper thumbnail of Thermal Properties of Microcrystalline Cellulose Derived Carbons

The thermal transport properties were studied for carbons produced by the carbonization of microc... more The thermal transport properties were studied for carbons produced by the carbonization of microcrystalline cellulose. Thermal diffusivity, specific heat, and thermal conductivity were measured via flash method for cellulose derived carbons prepared at various heat treatment temperatures ranging from 250°C to 1000°C. The thermal diffusivity as a function of increasing heat treatment temperature was observed to have four distinct linear regions, which could be related directly to the microstructures of the materials generated by the specific heat treatment temperature. Specific heat values indicated the coexistence of polar and non-polar phases in both partially carbonized materials obtained at lower heat treatment temperatures and fully carbonized materials formed at higher heat treatment temperatures. For partially carbonized materials, the polar groups consisting of residual hydroxyl and carboxyl were still present. For fully carbonized materials, the polar phases have largely been volatilized and conductive nano-carbon clusters were nucleated and observed to grow in an amorphous carbon bed until percolation effects were observed. Such structural characteristics are well supported by FT-IR characterizations. Lastly, a linear relationship between testing temperature and thermal conductivity indicates boundary scattering between highly conductive carbon clusters as the main mechanism for heat conduction.

Research paper thumbnail of Reactive Two-Step Additive Manufacturing of Ultra-high Temperature Carbide Ceramics

arXiv (Cornell University), Jul 29, 2022

Research paper thumbnail of Discrete failure mode detection in a woven SiC cloth reinforced glass composite

Journal of Materials Science, 1991

Research paper thumbnail of Reactive laser synthesis of ultra-high-temperature ceramics HfC, ZrC, TiC, HfN, ZrN, and TiN for additive manufacturing

Research paper thumbnail of Procede de preparation de composites metal-seconde phase utilisant des composes a titre de produits de depart, et produits ainsi obtenus

Procede de preparation de materiaux composites consistant a precipiter in situ des particules d&#... more Procede de preparation de materiaux composites consistant a precipiter in situ des particules d'une seconde phase dans une matrice metallique, et produits ainsi obtenus. Le procede implique l'utilisation initiale de composes a titre de sources de reactifs de formation de la seconde phase. Les composites obtenus peuvent comprendre des dispersions d'un ou de plusieurs materiaux de seconde phase. A titre d'exemples, les composes initiaux utilises comme precurseurs peuvent etre choisis parmi le groupe suivant: nitrure de bore, carbure de bore, oxyde de bore, nitrure d'aluminium, carbure d'aluminium, borure d'aluminium, oxyde de fer et oxyde de cuivre.

Research paper thumbnail of Isothermal process for formation of porous compounds consisting of metal and second phase and obtained thereby porous product

Research paper thumbnail of Reactive two-step additive manufacturing of ultra-high temperature carbide ceramics

Additive manufacturing, 2023

Research paper thumbnail of Proinflammatory cytokine expression of IL-1β and TNF-α by human osteoblast-like MG-63 cells upon exposure to silicon nitride in vitro

Journal of Biomedical Materials Research, Apr 1, 2000

... Afshin Sohrabi 1,2 ,; Christof Holland 1 ,; Ricky Kue 3 ,; Dennis Nagle 3 ,; David S. Hungerf... more ... Afshin Sohrabi 1,2 ,; Christof Holland 1 ,; Ricky Kue 3 ,; Dennis Nagle 3 ,; David S. Hungerford 1 ,; Carmelita G. Frondoza 1,2,*. Article first published online: 24 JAN 2000. DOI: 10.1002/(SICI)1097-4636(200004)50:1<43::AID-JBM7>3.0.CO;2-A. Copyright © 2000 John Wiley ...

Research paper thumbnail of Selective Laser Reaction Synthesis of SiC, Si$_3$N$_4$ and HfC/SiC Composites for Additive Manufacturing

arXiv (Cornell University), Jul 29, 2022

Research paper thumbnail of Selected physical and mechanical properties of resin infused porous carbon composites made from medium density fiberboard

Forest Products Journal, 2009

Research paper thumbnail of Growth of graphite single crystals from iron-carbon solutions

Journal of Materials Science, Jul 1, 1971

Graphite crystals grown from hypereutectic solutions of carbon in iron were examined microscopica... more Graphite crystals grown from hypereutectic solutions of carbon in iron were examined microscopically with a view to establishing the mechanisms of growth. It is proposed that nucleation occurred on a second phase which had been retained in some crystals extracted from the molten solution. The perfection of the crystals, which is compared with that of naturally occurring and pyrolytic graphites, is a function of the extent of decomposition of this second phase and the impurity content of the melt.

Research paper thumbnail of Oxidation protection in carbon-carbon composites

Materials Research Bulletin, Nov 1, 1986

Research paper thumbnail of Reactive Laser Synthesis of Ultra-high-temperature Ceramics HfC, ZrC, TiC, HfN, ZrN, and TiN for Additive Manufacturing

arXiv (Cornell University), Aug 3, 2022

Research paper thumbnail of 11. Mechanisms operative in growth of graphite crystals from solution

Research paper thumbnail of 136. Glassy carbon-CVD composites

Research paper thumbnail of The anisotropy of pyrolytic graphite

Journal of Applied Crystallography, Oct 1, 1973

Research paper thumbnail of Napthalene crystals formed from propylene

Research paper thumbnail of The importance of strain in crystallite size determinations in graphite

Research paper thumbnail of Characterization of highly oriented synthetic graphites

Research paper thumbnail of Developing a Low-Cost, Ultraportable, Modular Device Platform to Improve Access to Safe Surgery

Research paper thumbnail of Thermal Properties of Microcrystalline Cellulose Derived Carbons

The thermal transport properties were studied for carbons produced by the carbonization of microc... more The thermal transport properties were studied for carbons produced by the carbonization of microcrystalline cellulose. Thermal diffusivity, specific heat, and thermal conductivity were measured via flash method for cellulose derived carbons prepared at various heat treatment temperatures ranging from 250°C to 1000°C. The thermal diffusivity as a function of increasing heat treatment temperature was observed to have four distinct linear regions, which could be related directly to the microstructures of the materials generated by the specific heat treatment temperature. Specific heat values indicated the coexistence of polar and non-polar phases in both partially carbonized materials obtained at lower heat treatment temperatures and fully carbonized materials formed at higher heat treatment temperatures. For partially carbonized materials, the polar groups consisting of residual hydroxyl and carboxyl were still present. For fully carbonized materials, the polar phases have largely been volatilized and conductive nano-carbon clusters were nucleated and observed to grow in an amorphous carbon bed until percolation effects were observed. Such structural characteristics are well supported by FT-IR characterizations. Lastly, a linear relationship between testing temperature and thermal conductivity indicates boundary scattering between highly conductive carbon clusters as the main mechanism for heat conduction.

Research paper thumbnail of Reactive Two-Step Additive Manufacturing of Ultra-high Temperature Carbide Ceramics

arXiv (Cornell University), Jul 29, 2022

Research paper thumbnail of Discrete failure mode detection in a woven SiC cloth reinforced glass composite

Journal of Materials Science, 1991

Research paper thumbnail of Reactive laser synthesis of ultra-high-temperature ceramics HfC, ZrC, TiC, HfN, ZrN, and TiN for additive manufacturing

Research paper thumbnail of Procede de preparation de composites metal-seconde phase utilisant des composes a titre de produits de depart, et produits ainsi obtenus

Procede de preparation de materiaux composites consistant a precipiter in situ des particules d&#... more Procede de preparation de materiaux composites consistant a precipiter in situ des particules d'une seconde phase dans une matrice metallique, et produits ainsi obtenus. Le procede implique l'utilisation initiale de composes a titre de sources de reactifs de formation de la seconde phase. Les composites obtenus peuvent comprendre des dispersions d'un ou de plusieurs materiaux de seconde phase. A titre d'exemples, les composes initiaux utilises comme precurseurs peuvent etre choisis parmi le groupe suivant: nitrure de bore, carbure de bore, oxyde de bore, nitrure d'aluminium, carbure d'aluminium, borure d'aluminium, oxyde de fer et oxyde de cuivre.

Research paper thumbnail of Isothermal process for formation of porous compounds consisting of metal and second phase and obtained thereby porous product

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