Pressureless sintering of dual-phase, high-entropy boride–carbide ceramics

Smith, Steven M.; Fahrenholtz, William G.; Hilmas, Greg E.; Huang, Tieshu

doi:10.1111/jace.19053

Pressureless sintering of dual-phase, high-entropy boride–carbide ceramics

Journal Article · Thu Feb 16 00:00:00 EST 2023 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/jace.19053· OSTI ID:1960528

^[1]; ^[1]; Hilmas, Greg E. ^[1]; Huang, Tieshu ^[2]

Missouri Univ. of Science and Technology, Rolla, MO (United States)
Honeywell Manufacturing & Technologies, Kansas City, MO (United States)

Here, dual-phase, high-entropy boride–carbide ceramics were densified by pressureless sintering. Relative densities up to approximately 96% were obtained for ceramics containing about 30 vol% high-entropy boride and 70 vol% high-entropy carbide. Isostatic pressing at 200 MPa resulted in higher relative densities of both the green bodies and final ceramics compared to uniaxial pressing. The highest relative density of 96.3% was achieved for a ceramic that was isostatically pressed at 200 MPa and sintered at 2300°C for 2 h. Grain sizes of the resulting ceramics were approximately 2 µm. This is the first report of pressureless sintering of dual-phase, high-entropy boride–carbide ceramics.

View Accepted Manuscript (DOE)

Research Organization:: Kansas City Plant (KCP), Kansas City, MO (United States)

Sponsoring Organization:: Honeywell Federal Manufacturing & Technologies; USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0002839

OSTI ID:: 1960528

Report Number(s):: NSC-614-4978

Journal Information:: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 6 Vol. 106; ISSN 0002-7820

Publisher:: American Ceramic SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
borides
carbides
ceramics
high-entropy
sintering

Pressureless sintering of dual-phase, high-entropy boride–carbide ceramics

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