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A study of B 4 C‐SiC composite for self‐lubrication
Author(s) -
Zhang Wei,
Yamashita Seiji,
Kita Hideki
Publication year - 2021
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/jace.17584
Subject(s) - annealing (glass) , composite number , materials science , lubrication , composite material , friction coefficient , tribology , coefficient of friction
A B 4 C‐SiC composite without annealing and two B 4 C‐SiC composites followed by annealing at 1000℃ and 1200℃ for 1 hour in air, respectively, were prepared. The tribological properties of the three composites were evaluated by sliding against SiC balls at room temperature under unlubricated conditions. The B 4 C‐SiC composite can obtain lower friction coefficient by annealing at 1000℃, whereas the friction coefficient of B 4 C‐SiC composite annealed at 1200℃ was significantly increased. The cause for this difference was ascribed to different surface compositions after annealing. The mechanism of self‐lubrication of the B 4 C‐SiC composite was the formation of H 3 BO 3 layer.