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Microstructural Coarsening During Sintering of Boron Carbide
Author(s) -
Dole Stephen L.,
Prochazka Svante,
Doremus Robert H.
Publication year - 1989
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1989.tb06252.x
Subject(s) - sintering , materials science , boron carbide , microstructure , metallurgy , pressureless sintering , carbide , pressing , hot pressing , boron , composite material , chemistry , organic chemistry
The sintering behavior of boron carbide was investigated with particular attention given to microstructure development at various stages in the sintering process. Hot‐pressing and pressureless sintering techniques were employed and the effects of heating rate, firing atmosphere, and composition were used to characterize the sintering behavior. Pressureless sintering at temperatures up to 2300°C produces only limited densification. Microstructural coarsening is responsible for this since it leads to conditions where densification is slow. Hot‐pressing and carbon additions suppressed coarsening and permitted densification to >95% of theoretical density.