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In situ synthesis mechanism of ZrC‐ZrB 2 /Cu composites prepared by SHS‐casting method
Author(s) -
Zhang Mengxian,
Zhao Xianrui,
Yao Hailong,
Wang Hongtao,
Li Shibin,
Yang Chao,
Chen Qingyu,
Bai Xiaobo
Publication year - 2019
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.13305
Subject(s) - materials science , combustion , self propagating high temperature synthesis , composite material , dissolution , ceramic , precipitation , quenching (fluorescence) , phase (matter) , in situ , metal , casting , metallurgy , microstructure , chemical engineering , chemistry , physics , organic chemistry , quantum mechanics , meteorology , engineering , fluorescence
The self‐propogating high‐temperature syntheis (SHS) experiments in the glove box indicated that the combustion temperature decreased and the ignition time increased with increasing B 4 C size in Cu‐Zr‐B 4 C system. Once B 4 C size exceeded 28 μm, the full conversion of ZrC and ZrB 2 failed. In situ ZrC and ZrB 2 ceramic particle‐reinforced Cu matrix composites were produced by the self‐propagating high‐temperature synthesis reaction of Cu‐Zr‐B 4 C system in molten Cu. Moreover, the phase formation mechanism was investigated by the combustion wave quenching experiment of Cu‐Zr‐B 4 C powder compact in Cu liquid. Results showed that ZrC and ZrB 2 were mainly formed by the dissolution‐reaction‐precipitation mechanism. A developed method arresting the combustion front of a reactant in molten metal was proposed.