Experimental study of polycrystalline ceramic material based on lanthanum hexaboride

Movenko D.A., Zaysev D.V., Medvedev P.N.
UDC
621.762.4.04.016.2
DOI
10.18577/2307-6046-2022-0-9- 121-130
Article PDF (Russian) (954.94 KB)
How to cite
Movenko D.A., Zaysev D.V., Medvedev P.N. Experimental study of polycrystalline ceramic material based on lanthanum hexaboride // Proceedings of VIAM. 2022. No. 9. DOI: 10.18577/2307-6046-2022-0-9- 121-130. URL: https://test.viam.ru/en/journal/2022/9/10
Keywords
lanthanum hexaboride, spark plasma sintering, polycrystalline ceramic material, structure analysis, grain size, pore volume fraction
Abstract

The analysis of the influence of technological parameters on the structure of a polycrystalline material based on lanthanum hexaboride produced by spark plasma sintering is carried out. It is established that an increase in the sintering temperature from 1700 to 1850 °C contributes to the formation of a favorable structure of ceramic material with equiaxed grains up to 30 microns in size and closed small-sized pores with a volume fraction of up to 3 %. Alloying ceramic material with nickel to its content of no more than 0.5 % by weight allows to obtain such a structure at a lower sintering temperature: 1700 °C.

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