In situ synthesis mechanism of ZrC‐ZrB2/Cu composites prepared by SHS‐casting method. Issue 6 (20th June 2019)

• Record Type: Journal Article
• Authors: Zhang, Mengxian; Zhao, Xianrui; Yao, Hailong; Wang, Hongtao; Li, Shibin; Yang, Chao; Chen, Qingyu; Bai, Xiaobo
• Is Part Of: International journal of applied ceramic technology. Volume 16:Issue 6(2019)
• Page Start: 2229
• Page End: 2235
• Publication Date: 2019-06-20
• Subjects: borides -- carbides -- composites -- reaction path -- self‐propagating high‐temperature synthesis; Ceramics -- Periodicals; Ceramics -- Technological innovations -- Periodicals; 620.1405
• DOI: 10.1111/ijac.13305
• Languages: English
• ISSNs: 1546-542X

Abstract

Abstract: 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 B4 C size in Cu‐Zr‐B4 C system. Once B4 C size exceeded 28 μm, the full conversion of ZrC and ZrB2 failed. In situ ZrC and ZrB2 ceramic particle‐reinforced Cu matrix composites were produced by the self‐propagating high‐temperature synthesis reaction of Cu‐Zr‐B4 C system in molten Cu. Moreover, the phase formation mechanism was investigated by the combustion wave quenching experiment of Cu‐Zr‐B4 C powder compact in Cu liquid. Results showed that ZrC and ZrB2 were mainly formed by the dissolution‐reaction‐precipitation mechanism. A developed method arresting the combustion front of a reactant in molten metal was proposed.