Mechanical polishing of ultrahard nanotwinned diamond via transition into hard sp(2)-sp(3) amorphous carbon
Mechanical polishing of ultrahard nanotwinned diamond via transition into hard sp(2)-sp(3) amorphous carbon
复制标题
通过转变为硬sp(2)-sp(3)无定形碳对超硬纳米孪晶金刚石进行机械抛光
DOI：
10.1016/j.carbon.2020.01.041
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发表时间：
2020
期刊：
影响因子：
10.9
通讯作者：
Tian Yongjun
中科院分区：
文献类型：
--
作者：
Jin Tianye;Ma Mengdong;Li Baozhong;Gao Yufei;Zhao Qingliang;Zhao Zhisheng;Chen Junyun;Tian Yongjun
Ultrahard nanotwinned diamond (nt-D) is an ideal material for next-generation high-precision, high-efficiency cutting tools, due to its high hardness, enhanced fracture toughness, and increased oxidation resistance temperature, when compared with natural diamond. However, a critical problem that limits the application of such material is the grinding and polishing of nt-D material into suitable shapes. In this study, we confirmed the feasibility of classical mechanical polishing for nt-D through amorphization transition. The effect of mechanical loading and the catalysis of Fe nano-particles work together, promoting the transformation of nt-D into a hardsp2-sp3amorphous carbon. The surface of the amorphous carbon layer and the interface between amorphous carbon and nt-D were both smooth after polishing. The results are valuable for the mechanical processing and further applications of ultrahard nanotwinned diamond.
