Effect of interface microstructure on properties of polycrystalline diamond composites

• Published in: Jin gang shi yu mo liao mo ju gong cheng Vol. 42; no. 1; pp. 76 - 80
• Main Authors: Dongpeng ZHAO, Changjian GENG, Haijiang FANG
• Format: Journal Article
• Language: Chinese
• Published: Zhengzhou Research Institute for Abrasives & Grinding Co., Ltd 01.02.2022
• Subjects: heat-resistant temperature; impact resistance; metal pool; polycrystalline diamond compact (pdc); wear resistance
• ISSN: 1006-852X
• DOI: 10.13394/j.cnki.jgszz.2021.0110

The cemented carbide matrix and the preferred main crystal of 25 μm diamond particles as raw materials, the polycrystalline diamond composites (PDC) was prepared by domestic hinge-type cubic-anvil press at high temperature and high pressure (HPHT) under two processes. Effect of microstructure at PDC interface on its properties was studied. The results show that there is a dendrite-like growth metal pool at the interface of PDC prepared by process 1, which is formed by the migration of metal elements in cemented carbide to polycrystalline diamond layer, and the main elements are C, W and Co. This phenomenon does not exist in the interface of PDC prepared by process 2. The heat resistance temperature is 870 ℃, the impact resistance grade is 32 and the grinding area is 5.860 mm2 of PDC prepared by process 1. The heat resistance temperature is 920 ℃, the impact resistance grade is 45, and the grinding area is 5.166 mm2 of PDC prepared by process 2. Compared with the PDC prepared by process 1, the heat resistance,