Thermodynamic and kinetic study on interfacial reaction and diamond graphitization of Cu–Fe-based diamond composite

doi:10.1088/1674-1056/22/1/018102

Abstract Cu-Fe based diamond composites used for saw-blade segments are directly fabricated by vacuum and pressure-assisted sintering. The carbide forming elements Cr and Ti are added to improve interfacial bonding between diamond and Cu-Fe matrix. The interfacial reactions between diamond/graphite and Cr or Ti, and diamond graphitization are investigated by thermodynamics/kinetics analyses and experimental methods. The results show that interfacial reactions and graphitization of diamond can automatically proceed thermodynamically. The Cr₃C₂, Cr₇C₃, Cr₂₃C₆, and TiC are formed at the interfaces of composites by reactions between diamond and Cr or Ti; diamond graphitization does not occur because of the kinetic difficulty at 1093 K under the pressure of 13 MPa.

Keywords: thermodynamics kinetics diamond composites diamond graphitization

Received: 11 May 2012
Revised: 18 June 2012
Accepted manuscript online:

PACS:

81.05.uj

(Diamond/nanocarbon composites)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51165021) and the Science Fund for Distinguished Young Scholars of Gansu Province, China (Grant No. 111RJDA0103).

Corresponding Authors: Li Wen-Sheng
E-mail: wensheng-li@sohu.com

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Li Wen-Sheng (李文生), Zhang Jie (张杰), Dong Hong-Feng (董洪锋), Chu Ke (褚克), Wang Shun-Cai (王顺才), Liu Yi (刘毅), Li Ya-Ming (李亚明) Thermodynamic and kinetic study on interfacial reaction and diamond graphitization of Cu–Fe-based diamond composite 2013 Chin. Phys. B 22 018102

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Thermodynamic and kinetic study on interfacial reaction and diamond graphitization of Cu–Fe-based diamond composite

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