Conferences

Theoretical Strength of Borides and Quasibinary Boride Eutectics at High Temperatures

   

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2015, #03/04
http://www.materials.kiev.ua/article/1924

Abstract

The theoretical strength of LaB6 and МеB2 borides and a eutectic LaB6–TiB2 system is calculated with quasiharmonic approximation for uniaxial deformation in the temperature range between 0 and 2750 K. It is established that the linear temperature dependence of strength, typical of LaB6, does not hold in the range 1300–2200 K. It is shown that the theoretical strength increases with higher temperatures. The same dependence is typical of the LaB6–MeB2 systems (Me is Ti, Zr, Hf) at 0.7 mol.% LaB6.


BORIDES, EUTECTIC, TEMPERATURE DEPENDENCES, THE THEORETICAL STRENGTH, UNIAXIAL DEFORMATION