Polishing of single point diamond tool based on thermo-chemical reaction with copper

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• 作者：Naomichi Furushiro ; Masahiro Higuchi ; Tomomi Yamaguchi ; Shoichi Shimada ; Kazushi Obata
• 关键词：Thermo-chemical polishing ; Diamond cutting tool ; Fracture strength ; Wear rate ; Crack healing ; Tool life
• 刊名：Precision Engineering
• 出版年：2009
• 出版时间：October 2009
• 年：2009
• 卷：33
• 期：4
• 页码：486-491
• 全文大小：919 K

文摘

This paper describes a new polishing method for diamond cutting tools. The method is based on the principle of oxidization of copper and deoxidization of copper oxide by carbon. A diamond tool was brought into contact with a copper plate, heated in air to a range of 323–523 K. The depth of the removed layer of diamond increased almost linearly with contact time and reached approximately 7 nm after 6 h. In this erosion process, pre-existing microcracks on the diamond surface were reduced. In comparison with the mechanically polished tool, the thermo-chemically polished tool was highly resistant to chipping and yielded a significant rise in tool life.