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Papers by Sajad Hussain Din

Engineering Research Express, Jan 17, 2024

Proceedings on Engineering Sciences, Mar 12, 2021

Titanium and their alloys are biocompatible, corrosion resistant, good machinability, better fati... more Titanium and their alloys are biocompatible, corrosion resistant, good machinability, better fatigue strength and relatively low modulus of elasticity. Due to these desirable properties, they generally have cardiac and cardiovascular applications. For modern clinical requirements a proper tailoring of these materials can be done by surface modifications. This article gives a general perspective of surface modifications of titanium and its alloys. By allowing surface modifications of titanium and its alloys, properties of these materials can be changed in order to improve their biomedical applications.

Faculty of Engineering, University of Kragujevac, Feb 7, 2022

Surface Topography: Metrology and Properties, 2017

Journal of Bio- and Tribo-Corrosion, 2018

Smooth and adhesive microcrystalline CVD diamond coatings have been acquired successfully on chem... more Smooth and adhesive microcrystalline CVD diamond coatings have been acquired successfully on chemically etched titanium alloy (Ti6Al4V) substrates, using hot filament chemical vapor deposition technique. The mechanical and tribological characteristics of HFCVD microcrystalline diamond coatings on titanium alloy (Ti6Al4V) substrates are investigated in this research. SEM and Raman spectroscopy were used to study the morphology and quality of the coatings. The surface roughness has been determined by 3d profilometer measurements. A ball-on-disk tribometer was used to characterize the friction and wear of the coatings. The frictional behavior of the MCD coating was studied, when sliding against smooth alumina ball with increasing load (1-10 N). A coefficient of friction of ~ 0.3-0.287 was obtained at a sliding speed of 12 m/s. The wear of the diamond coating is negligible. The alumina balls are worn out quickly as compared to the diamond coatings. Nanoindentation tests were carried out using Berkovich nanoindenter, and the average super-hardness of MCD coatings was found to be 55 GPa.

Transactions of the Indian Institute of Metals

Bulletin of Materials Science

Journal of Superhard Materials, 2018

In the present study, HFCVD nanocrystalline, microcrystalline and boron-doped nanocrystalline dia... more In the present study, HFCVD nanocrystalline, microcrystalline and boron-doped nanocrystalline diamond coatings have been deposited on titanium alloy. The effect of boron doping on coefficient of friction and residual stresses of diamond coatings have been studied. The tribological characteristics of the aforementioned three coatings on Ti–6Al–4V substrates were studied using ball on disc micro-tribometer, the thickness of the coatings being 3 μm. The coated Ti–6Al–4V discs were slid against alumina (Al2O3) balls with normal load ranging from 1 to 10 N. The boron-doped NCD coated sample disc was found to possess the lowest average coefficient of friction ~ 0.0804 while the undoped NCD and MCD coated sample discs were found to possess the average coefficients of friction of ~ 0.143 and ~ 0.283, respectively. Raman spectroscopy studies revealed that the residual stresses in boron-doped nanocrystalline coatings were tensile in nature, while the residual stresses in undoped NCD and MCD w...

Gears are the most common means of transmitting power in the modern world. Gears are used to chan... more Gears are the most common means of transmitting power in the modern world. Gears are used to change the speed and power ratio as well as direction between an input and output shaft. The constant pressure to build less expensive, quieter running, light weight, and more powerful machinery has resulted in a steady improvement of gear designs. Despite having high cost, complicated manufacturing, need of precise alignment of shafts and lubrication, the gear drives are preferred over other power transmission drives. One of the important reasons of preference being that of efficiency which is very high in gear drives, even up to 99 per cent in case of spur gears. Spur gears are the simplest of the gear drives having teeth cut parallel to the axis of the shaft. In the present study a spur gear is investigated using a two dimensional finite element model. The two dimensional model offers significant advantages for dynamic gear analysis. The gear teeth are analysed for different operating spe...

Nanocomposites are high performance materials which reveal rare properties. Nanocomposites have a... more Nanocomposites are high performance materials which reveal rare properties. Nanocomposites have an estimated annual growth rate of 25% and fastest demand to be in engineering plastics and elastomers. Their prospective is so prominent that they are valuable in numerous areas ranging from packaging to biomedical applications. In this review the various types of matrix nanocomposites are discussed highlighting the need for these materials, their processing approaches and some recent results on structure, properties and potential applications. Perspectives including need for such future materials and other interesting applications. Being environmentally friendly, applications of nanocomposites propose new technology and business opportunities for several sectors of the aerospace, automotive, electronics and biotechnology industries.

Jurnal Tribologi, 2016

A comparison has been documented between nanocrystalline diamond (NCD) and microcrystalline diamo... more A comparison has been documented between nanocrystalline diamond (NCD) and microcrystalline diamond (MCD) coatings deposited on cemented tungsten carbide (WC-Co) substrates with architectures of WC-Co/NCD & WC-Co/MCD, using hot filament chemical vapor deposition (HFCVD) technique. In the present work, the frictional characteristics were studied using ball-on-disc type linear reciprocating micro-tribometer, under the application of 1–10N normal loads, when sliding against smooth alumina (Al2O3) ceramic ball for the total duration of 15min, under dry sliding conditions. Nanoindentation tests were also conducted using Berkovich nanoindenter for the purpose of measurement of hardness and elastic modulus values. The average coefficients of friction of MCD and NCD coatings decrease from 0.37 – 0.32 and 0.3 – 0.27 respectively, when the load is increased from 1–10N. However, for conventional WC-Co substrate the average coefficient of friction increases from 0.60–0.75, under the same input ...

Nano-crystalline diamond and microcrystalline diamond films have been separately deposited on che... more Nano-crystalline diamond and microcrystalline diamond films have been separately deposited on chemically treated titanium alloy (Ti6Al4V) substrates from methane/hydrogen (CH4/H2) gas mixture, using hot filament chemical vapor deposition technique. The coatings have architecture of Ti6Al4V/NCD and Ti6Al4V/MCD. The as grown nanocrystalline diamond and microcrystalline diamond films were characterized using high resolution scanning electron microscope and Raman’s spectroscopy. The residual stresses along the surface of nanocrystalline diamond coatings and micro-crystalline diamond coatings are compressive in nature as shown by the Raman spectroscopy. Nanoindentation tests were also conducted using Berkovich nanoindenter for the purpose of measurement of hardness and elastic modulus values. The indentation depth for microcrystalline diamond coating was 65 nm, whereas for nanocrystalline diamond coating, it was 72 nm. Microcrystalline diamond and nanocrystalline diamond coatings have yi...

Proceedings on Engineering Sciences

Characterization and Application of Nanomaterials

Nanocomposites are high performance materials which reveal rare properties. Nanocomposites have a... more Nanocomposites are high performance materials which reveal rare properties. Nanocomposites have an estimated annual growth rate of 25% and fastest demand to be in engineering plastics and elastomers. Their prospective is so prominent that they are valuable in numerous areas ranging from packaging to biomedical applications. In this review the various types of matrix nanocomposites are discussed highlighting the need for these materials, their processing approaches and some recent results on structure, properties and potential applications. Perspectives including need for such future materials and other interesting applications. Being environmentally friendly, applications of nanocomposites propose new technology and business opportunities for several sectors of the aerospace, automotive, electronics and biotechnology industries.

JOM, 2008

Titanium alloys are considered to be the most attractive metallic materials for biomedical applic... more Titanium alloys are considered to be the most attractive metallic materials for biomedical applications. Ti-6Al-4V has long been favored for biomedical applications. However, for permanent implant applications the alloy has a possible toxic effect resulting from released vanadium and aluminum. For this reason, vanadium-and aluminum-free alloys have been introduced for implant applications.

Engineering Research Express, Jan 17, 2024

Proceedings on Engineering Sciences, Mar 12, 2021

Titanium and their alloys are biocompatible, corrosion resistant, good machinability, better fati... more Titanium and their alloys are biocompatible, corrosion resistant, good machinability, better fatigue strength and relatively low modulus of elasticity. Due to these desirable properties, they generally have cardiac and cardiovascular applications. For modern clinical requirements a proper tailoring of these materials can be done by surface modifications. This article gives a general perspective of surface modifications of titanium and its alloys. By allowing surface modifications of titanium and its alloys, properties of these materials can be changed in order to improve their biomedical applications.

Faculty of Engineering, University of Kragujevac, Feb 7, 2022

Surface Topography: Metrology and Properties, 2017

Journal of Bio- and Tribo-Corrosion, 2018

Smooth and adhesive microcrystalline CVD diamond coatings have been acquired successfully on chem... more Smooth and adhesive microcrystalline CVD diamond coatings have been acquired successfully on chemically etched titanium alloy (Ti6Al4V) substrates, using hot filament chemical vapor deposition technique. The mechanical and tribological characteristics of HFCVD microcrystalline diamond coatings on titanium alloy (Ti6Al4V) substrates are investigated in this research. SEM and Raman spectroscopy were used to study the morphology and quality of the coatings. The surface roughness has been determined by 3d profilometer measurements. A ball-on-disk tribometer was used to characterize the friction and wear of the coatings. The frictional behavior of the MCD coating was studied, when sliding against smooth alumina ball with increasing load (1-10 N). A coefficient of friction of ~ 0.3-0.287 was obtained at a sliding speed of 12 m/s. The wear of the diamond coating is negligible. The alumina balls are worn out quickly as compared to the diamond coatings. Nanoindentation tests were carried out using Berkovich nanoindenter, and the average super-hardness of MCD coatings was found to be 55 GPa.

Transactions of the Indian Institute of Metals

Bulletin of Materials Science

Journal of Superhard Materials, 2018

In the present study, HFCVD nanocrystalline, microcrystalline and boron-doped nanocrystalline dia... more In the present study, HFCVD nanocrystalline, microcrystalline and boron-doped nanocrystalline diamond coatings have been deposited on titanium alloy. The effect of boron doping on coefficient of friction and residual stresses of diamond coatings have been studied. The tribological characteristics of the aforementioned three coatings on Ti–6Al–4V substrates were studied using ball on disc micro-tribometer, the thickness of the coatings being 3 μm. The coated Ti–6Al–4V discs were slid against alumina (Al2O3) balls with normal load ranging from 1 to 10 N. The boron-doped NCD coated sample disc was found to possess the lowest average coefficient of friction ~ 0.0804 while the undoped NCD and MCD coated sample discs were found to possess the average coefficients of friction of ~ 0.143 and ~ 0.283, respectively. Raman spectroscopy studies revealed that the residual stresses in boron-doped nanocrystalline coatings were tensile in nature, while the residual stresses in undoped NCD and MCD w...

Gears are the most common means of transmitting power in the modern world. Gears are used to chan... more Gears are the most common means of transmitting power in the modern world. Gears are used to change the speed and power ratio as well as direction between an input and output shaft. The constant pressure to build less expensive, quieter running, light weight, and more powerful machinery has resulted in a steady improvement of gear designs. Despite having high cost, complicated manufacturing, need of precise alignment of shafts and lubrication, the gear drives are preferred over other power transmission drives. One of the important reasons of preference being that of efficiency which is very high in gear drives, even up to 99 per cent in case of spur gears. Spur gears are the simplest of the gear drives having teeth cut parallel to the axis of the shaft. In the present study a spur gear is investigated using a two dimensional finite element model. The two dimensional model offers significant advantages for dynamic gear analysis. The gear teeth are analysed for different operating spe...

Nanocomposites are high performance materials which reveal rare properties. Nanocomposites have a... more Nanocomposites are high performance materials which reveal rare properties. Nanocomposites have an estimated annual growth rate of 25% and fastest demand to be in engineering plastics and elastomers. Their prospective is so prominent that they are valuable in numerous areas ranging from packaging to biomedical applications. In this review the various types of matrix nanocomposites are discussed highlighting the need for these materials, their processing approaches and some recent results on structure, properties and potential applications. Perspectives including need for such future materials and other interesting applications. Being environmentally friendly, applications of nanocomposites propose new technology and business opportunities for several sectors of the aerospace, automotive, electronics and biotechnology industries.

Jurnal Tribologi, 2016

A comparison has been documented between nanocrystalline diamond (NCD) and microcrystalline diamo... more A comparison has been documented between nanocrystalline diamond (NCD) and microcrystalline diamond (MCD) coatings deposited on cemented tungsten carbide (WC-Co) substrates with architectures of WC-Co/NCD & WC-Co/MCD, using hot filament chemical vapor deposition (HFCVD) technique. In the present work, the frictional characteristics were studied using ball-on-disc type linear reciprocating micro-tribometer, under the application of 1–10N normal loads, when sliding against smooth alumina (Al2O3) ceramic ball for the total duration of 15min, under dry sliding conditions. Nanoindentation tests were also conducted using Berkovich nanoindenter for the purpose of measurement of hardness and elastic modulus values. The average coefficients of friction of MCD and NCD coatings decrease from 0.37 – 0.32 and 0.3 – 0.27 respectively, when the load is increased from 1–10N. However, for conventional WC-Co substrate the average coefficient of friction increases from 0.60–0.75, under the same input ...

Nano-crystalline diamond and microcrystalline diamond films have been separately deposited on che... more Nano-crystalline diamond and microcrystalline diamond films have been separately deposited on chemically treated titanium alloy (Ti6Al4V) substrates from methane/hydrogen (CH4/H2) gas mixture, using hot filament chemical vapor deposition technique. The coatings have architecture of Ti6Al4V/NCD and Ti6Al4V/MCD. The as grown nanocrystalline diamond and microcrystalline diamond films were characterized using high resolution scanning electron microscope and Raman’s spectroscopy. The residual stresses along the surface of nanocrystalline diamond coatings and micro-crystalline diamond coatings are compressive in nature as shown by the Raman spectroscopy. Nanoindentation tests were also conducted using Berkovich nanoindenter for the purpose of measurement of hardness and elastic modulus values. The indentation depth for microcrystalline diamond coating was 65 nm, whereas for nanocrystalline diamond coating, it was 72 nm. Microcrystalline diamond and nanocrystalline diamond coatings have yi...

Proceedings on Engineering Sciences

Characterization and Application of Nanomaterials

Nanocomposites are high performance materials which reveal rare properties. Nanocomposites have a... more Nanocomposites are high performance materials which reveal rare properties. Nanocomposites have an estimated annual growth rate of 25% and fastest demand to be in engineering plastics and elastomers. Their prospective is so prominent that they are valuable in numerous areas ranging from packaging to biomedical applications. In this review the various types of matrix nanocomposites are discussed highlighting the need for these materials, their processing approaches and some recent results on structure, properties and potential applications. Perspectives including need for such future materials and other interesting applications. Being environmentally friendly, applications of nanocomposites propose new technology and business opportunities for several sectors of the aerospace, automotive, electronics and biotechnology industries.

JOM, 2008

Titanium alloys are considered to be the most attractive metallic materials for biomedical applic... more Titanium alloys are considered to be the most attractive metallic materials for biomedical applications. Ti-6Al-4V has long been favored for biomedical applications. However, for permanent implant applications the alloy has a possible toxic effect resulting from released vanadium and aluminum. For this reason, vanadium-and aluminum-free alloys have been introduced for implant applications.