Boron carbide based materials (B C-Me IV-VI V B y ) were obtained by pressureless sintering at 2150-2250Β°C in the presence of some transition metal (IV-VI group) carbides (Me IV-VI V C y , where Me is Ti, V, Cr, and W). The structural and mechanical (micro hardness, abrasive wear resistance) propert
Sintering of Boron and Boron Carbide
β Scribed by G.I. Kalandadze; S.O. Shalamberidze; A.B. Peikrishvili
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 551 KB
- Volume
- 154
- Category
- Article
- ISSN
- 0022-4596
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β¦ Synopsis
An investigation of sintering kinetics of boron and boron carbide is presented. The in6uence of the powder size distribution on the temperature dependence of sintering, on reaching a high 5nal density, and on gaining a homogeneous grain size has been shown. The results on the -rhombohedral usage in reaction sintering for boron carbide production have been given. With the example of boron, the maximum sintering density was reached as the process was managed under the conditions providing the successive phase transitions in boron, B amorph. PB PB . The results of sintering of boron and boron carbide pellets compacted by explosive compression have been considered. Explosive press-ing+sintering produces pellets of amorphous and -rhombohedral boron.
π SIMILAR VOLUMES
The vibrations of boron carbide B 13 C 2 have been studied by the valence force model. The 1560-cm Ψ1 band is ascribed to the antisymetric stretching of the linear chain, and thereby it is IR active only. Large angle-bending forces of the carbon atoms are estimated to agree with the experiment. This