Polycrystalline diamond compact with enhanced thermal stability

被引：61

作者：

Liu, Shiqi ^{[1
,2
]}

Han, Lei ^{[3
]}

Zou, Yongtao ^{[4
]}

Zhu, Pinwen ^{[4
]}

Liu, Baochang ^{[1
,2
,4
]}

机构：

[1] Jilin Univ, Coll Construct Engn, Changchun 130061, Jilin, Peoples R China

[2] Minist Land & Resources, Key Lab Drilling & Exploitat Technol Complex Cond, Changchun 130061, Jilin, Peoples R China

[3] China Coal Technol & Engn Grp Corp, Xian Res Inst, Xian 710077, Shaanxi, Peoples R China

[4] Jilin Univ, State Key Lab Superhard Mat, Changchun 130021, Jilin, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2017年 / 33卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Polycrystallie diamond compacts; High pressure and high temperature; Thermal stability; HIGH-PRESSURE; SINTERING TEMPERATURE; SIC COMPOSITES; BONDING PHASE; NANOCOMPOSITES;

D O I：

10.1016/j.jmst.2017.03.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polycrystalline diamond compacts (PDC), which are composed of diamond and WC/Co substrate, and synthesized at high pressure and high temperature (HPHT), are widely applied as the tooth of drilling bit. However, the thermal stability of PDC will be reduced when diamond transforms into graphite due to cobalt in PDC acting as a catalyst during the drilling work. In this study, a new three-layer structured PDC with enhanced thermal stability has been successfully synthesized at pressures of 5.5-7.0 GPa and temperatures of 1650-1750 degrees C. In this structure, the diamond-SiC composite acts as the working layer, and the diamond-SiC-Co composite and WC/Co cements are as the intermediate layer and substrate, respectively. It is found that the initial oxidizing temperature of the three-layered PDC is enhanced up to 820 degrees C, which is significantly higher than that (similar to 780 degrees C) of the conventional PDC counterpart. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：1386 / 1391

页数：6

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