Results 131 to 140 of about 1,774 (185)

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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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
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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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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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Influence of TiB2 content on microstructure and hardness of TiB2–B4C composite

Powder Technology, 2005
Abstract 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, G. Guruprasad, D. Black, R. Radhakrishnan, T.S. Sudarshan   +4 more
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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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Synthesis and Properties of TiB2/TiN and TiB2/B4C Films

2004
The TiB2/TiN and TiB2/B4C films with a thickness of approximately 1–2 μm were prepared by magnetron non-reactive d.c./r.f. sputtering on Si and stainless steel substrates. Sintered and hot-pressed targets of the individual compounds (TiB2, TiN and B4C) and their mixtures (25/75, 50/50 and 75/25 in weight percents) were used in the film preparation ...
R.A. Andrievski, G.V. Kalinnikov
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Theoretical investigation of TiB2 nanotubes

Microelectronics Journal, 2003
Abstract 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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Effect of TiB2 on the Phase Composition, Microstructure, and Tribological Properties of AlCoCrFeNi/TiB2 Composites

Powder Metallurgy and Metal Ceramics, 2021
High entropy alloys (HEAs) attract more and more attention due to their simple structure, high strength and hardness, good ductility, and excellent softening, oxidation, corrosion, and wear resistance properties. Among the known HEA systems, the AlCoCrFeNi alloy exhibits complicated microstructure and excellent mechanical properties. In this study, the
J. G. Kang, B. T. Yang, J. C. Wei
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Modification mechanism of primary silicon by TiB2 particles in a TiB2/ZL109 composite

Journal of Materials Science, 2014
Modification of primary silicon was observed in a hypereutectic Al–Si composite reinforced with TiB2 particles. The primary silicon was found to be refined significantly by TiB2 particles, with the size being reduced from about 25 to 5 μm. Close observation of the microstructure indicates that the TiB2 particles engulfed by the primary silicon acts as ...
Jing Sun, Xiaobo Zhang, Yijie Zhang, Naiheng Ma, Haowei Wang   +4 more
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