High-temperature functionally graded material fabricated via reactive alloy infiltration

Prokofiev V.A., Sorokin O.Ju., Vaganova M.L., Lebedeva Yu.E.
UDC
678.84
DOI
10.18577/2307-6046-2018-0-11-45-53
Article PDF (Russian) (806.59 KB)
How to cite
Prokofiev V.A., Sorokin O.Ju., Vaganova M.L., Lebedeva Yu.E. High-temperature functionally graded material fabricated via reactive alloy infiltration // Proceedings of VIAM. 2018. No. 11. DOI: 10.18577/2307-6046-2018-0-11-45-53. URL: https://test.viam.ru/en/journal/2018/11/6
Keywords
high temperature ceramics, infiltration, thermodynamic calculations, Gibb’s energy, eutectic alloy, functionally graded material, oxidation.
Abstract

Microstructure and properties of HfB2–SiC–B4C–Si ceramics obtained via reactive melt infiltration of SiC–B4C–С porous preform using Si–Hf (8,5% ат.) alloy were studied. It was shown that the ceramics can be defined as a functionally graded material (FGM) in which SiC content increases, whereas HfB2 content decreases from the outer surface to the center. Therefore, HfB2–SiC–B4C ceramics has a rather low density and exhibits high oxidation resistance.

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