Results 131 to 140 of about 1,612 (168)

On the oxidation behaviour of monolithic TiB2 and Al2O3-TiB2 and Si3N4-TiB2 composites

Journal of Thermal Analysis, 1992
In 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
A. Tampieri, E. Landi, A. Bellosi
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Tribological properties of TiB2 and TiB2–MoSi2 ceramic composites

Journal of the European Ceramic Society, 2006
Abstract 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, Bikramjit Basu, Amitesh Srivastava, R. Balasubramaniam, A.K. Suri   +4 more
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Effect of TiB2 Pretreatment on Pt/TiB2 Catalyst Performance

Electrochimica Acta, 2014
Abstract 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, Rui Lin, Renjie Fan, Qinbai Fan, Jianxin Ma   +4 more
openaire   +1 more source

Oxidation of monolithic TiB2 and of Al2O3-TiB2 composite

Journal of Materials Science, 1993
In 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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Sintered porous cermets based on TiB2 and TiB2–TiC–Mo2C

Materials Chemistry and Physics, 2001
Abstract 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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Fabrication of TiB2 and TiB2–TiC particulates reinforced magnesium matrix composites

Materials Science and Engineering: A, 2004
Abstract A TiB 2 particulate reinforced magnesium matrix composite (MMCs) was fabricated by adding a TiB 2 –Al master alloy processed via self-propagating high-temperature synthesis (SHS) reaction in Al–Ti–B system into molten magnesium and using the stir casting technique.
H.Y. Wang, Q.C. Jiang, Y.Q. Zhao, F. Zhao, B.X. Ma, Y. Wang   +5 more
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Al2O3-TiB2 composite ceramics

Journal of Materials Science Letters, 1989
Des melanges de poudres de Al 2 O 3 et TiB 2 contenant de 0 a 40% en poids de TiB 2 ont ete frittes entre 1400 et 1800 o C. On etudie les proprietes mecaniques et electriques des echantillons frittes et on examine la microstructure par ...
W. Stadlbauer, W. Kladnig, G. Gritzner
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Microstructure and tribology of TiB2 and TiB2/TiN double-layer coatings

Surface and Coatings Technology, 1996
Abstract 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, Zhihong Zheng, Xi Wang, Xianghuai Liu, J.G. Man, J.S. Yoon   +5 more
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Wear of TiB2 coatings

Wear, 1981
Abstract The wear properties of elctrodeposited coatings of TiB 2 in low speed (5 cm s −1 ) and high speed (30 m s −1 ) sliding applications in contact with hardened steel are reported. An improved method for the preparation of these coatings is described.
J.A. Kirk, D.R. Flinn, M.J. Lynch
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Synthesis and sintering of TiB2 and TiB2–TiC composite under high pressure

Materials Science and Engineering: A, 2000
TiB2 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, C. Divakar, A.K. Singh, G.S. Upadhyaya   +3 more
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