Suppression of abnormal grain growth in fine grained polycrystalline diamond materials (PCD)

被引：7
|
作者：
McKie, Amanda [1 ,2 ]
Herrmann, Mathias [3 ]
Sigalas, Iakovos [1 ,2 ]
Sempf, Kerstin [3 ]
Nilen, Roger [4 ]
机构：
[1] Univ Witwatersrand, Sch Chem & Met Engn, ZA-2050 Johannesburg, South Africa
[2] Univ Witwatersrand, DST NRF Ctr Excellence Strong Mat, ZA-2050 Johannesburg, South Africa
[3] Fraunhofer Inst Ceram Technol & Syst, IKTS, D-01277 Dresden, Germany
[4] Element Six Pty Ltd, Springs, South Africa
来源：
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2013年 / 41卷
基金：
新加坡国家研究基金会;
关键词：
Polycrystalline diamond; PCD; Abnormal grain growth; Diamond enhanced carbide; HIGH-TEMPERATURE;
D O I：
10.1016/j.ijrmhm.2013.02.004
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
During the sintering of fine grained (0.5 mu m) polycrystalline diamond (PCD) composite materials under high pressure-high temperature (HPHT) conditions, abnormal grain growth (AGG) of the diamond was observed. These abnormally grown diamond grains were up to several hundreds of microns in diameter. Diamond enhanced carbide substrates were used to suppress the abnormal grain growth. Electron backscattered diffraction was used to obtain grain orientation of the single crystals. The AGG was explained in a framework of the changed driving forces of the grain growth due to different initial carbon concentrations in the melt, particle size distribution and growth mechanisms. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：66 / 72
页数：7
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