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Reactive Hot‐Pressing and Flexural Strength of Z r B 2 ‐ Z r C x ‐ Z r‐Based Cermets with S i C Additives
Author(s) -
Guo Shuqi
Publication year - 2014
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12271
Subject(s) - flexural strength , cermet , materials science , silicide , hot pressing , phase (matter) , zirconium , sintering , composite material , metallurgy , silicon , chemistry , ceramic , organic chemistry
In this study, Z r B 2 ‐ Z r C x ‐ Z r cermets with 20 vol% S i C additives were prepared via reactive hot‐pressing of Z r + B 4 C + S i C powder mixtures. Relative density exceeding 95% was obtained for the sintered cermets with 10 vol% excess Z r and without excess Z r. The resulting cermets composed of Z r B 2 , Z r C x , and S i C primary phases and zirconium silicide secondary phase. The presence of excess Z r improved densification of cermets as well as promoted formation of zirconium silicide. However, excess Z r led to the lowered room temperature flexural strength. The room temperature flexural strength of cermets was in the range of 384.2−409.2 MPa.