Results 131 to 140 of about 1,708 (185)
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On the oxidation behaviour of monolithic TiB2 and Al2O3-TiB2 and Si3N4-TiB2 composites
Journal of Thermal Analysis, 1992In view of the susceptibility of TiB2 to oxidation, the thermal stability of monolithic TiB2 and of Al2O3-30 vol% TiB2 and Si3N4-20 vol% TiB2 composites was investigated. The temperature at which TiB2 ceramic starts to oxidize is about 400°C, oxidation kinetics being controlled by diffusion up toT≈900°C and in the first stage of the oxidation at 1000°C
Elena Landi, A Bellosi, A Tampieri
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Vacuum Carbothermal Synthesis of TiB2
Journal of Superhard Materials, 2023Yalova ...
Buğdaycı, Mehmet, Güleç, Şeyma
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Oxidation of monolithic TiB2 and of Al2O3-TiB2 composite
Journal of Materials Science, 1993In view of the susceptibility of TiB2 to oxidation, the thermal stability of monolithic TiB2 and Al2O3-TiB2 composite was investigated. The temperature at which TiB2 ceramic starts to oxidize is about 400°C, oxidation kinetic being controlled by diffusion up toT≈900°C and in the first stage of the oxidation at 1000 and 1100°C (up to 800 and 500 min ...
A. Tampieri, A. Bellosi
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Tribological properties of TiB2 and TiB2–MoSi2 ceramic composites
Journal of the European Ceramic Society, 2006Abstract Recently, dense monolithic TiB 2 and TiB 2 –20 wt.% MoSi 2 composites with high hardness (24–26 GPa) have been processed by hot pressing. To assess the tribological potential, the present study was performed in analyzing the influence of load on the fretting wear of TiB 2 and TiB 2 –MoSi 2 composites against bearing steel.
T.S.R.Ch. Murthy +4 more
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Effect of TiB2 Pretreatment on Pt/TiB2 Catalyst Performance
Electrochimica Acta, 2014Abstract Carbon support corrosion of traditional Pt/C catalyst is one of the major contributors causing poor durability of proton exchange membrane fuel cells (PEMFC). Titanium diboride (TiB 2 ) has high electrical conductivity and considerable chemical stability, which making it as a good candidate for catalyst support in PEMFC. In this work, TiB 2
Zhen Huang +4 more
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Sintered porous cermets based on TiB2 and TiB2–TiC–Mo2C
Materials Chemistry and Physics, 2001Abstract TiB 2 powder, with different binders (Ni and Ni/Mn), after milling were cold compacted (300 MPa) and sintered in H 2 at 1300 and 1350°C for 1 h. To improve the sintering behaviour, TiC/Mo 2 C alloy carbide was added and the milled charge along with the same binders (Ni and Ni/Mn) was cold compacted and sintered under similar conditions ...
Manmohan Singh, K.N Rai, G.S Upadhyaya
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Influence of TiB2 content on microstructure and hardness of TiB2–B4C composite
Powder Technology, 2005Abstract In this study a composite ceramic powder mixture using fine powders of titanium diboride (TiB2) and boron carbide (B4C) was consolidated to theoretical density using the technique of plasma pressure compaction. Achieving rapid consolidation of the composite powder mixture is an essential requirement for achieving microstructural control and ...
T.S. Srivatsan +4 more
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Microstructure and tribology of TiB2 and TiB2/TiN double-layer coatings
Surface and Coatings Technology, 1996Abstract TiB 2 /TiN double-layer coatings were prepared by ion-beam-enhanced deposition. Auger electron spectroscopy (AES), X-ray diffraction (XRD), transmission electron microscopy (TEM) and high-resolution TEM (HRTEM) were employed to characterize the TiB 2 layer.
Yunjie Yang +5 more
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Theoretical investigation of TiB2 nanotubes
Microelectronics Journal, 2003Abstract We investigated the energetic and electronic properties of zig-zag titanium diboride (TiB2) nanotubes through ab initio density functional theory. It is determined that an isolated (6,0) bilayered TiB2 nanotube has a semiconductor character, with an energy gap of 1.32 eV.
Silvete Guerini, Paulo Piquini
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Synthesis and sintering of TiB2 and TiB2–TiC composite under high pressure
Materials Science and Engineering: A, 2000TiB2 and TiB2x2013;TiC composite compacts with 98x2013;99% density are prepared by high-pressure sintering (HPS) of premixed powders and by high-pressure self-combustion synthesis (HPCS) from the elemental constituents. The sintering and synthesis experiments are carried out at 3 GPa in the temperature and time ranges 2250x2013;2750 K and 5x2013;300 s,
S.K. Bhaumik +3 more
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