D-D结合型金刚石聚晶的高压合成研究

洪时明; 罗湘捷; 陈叔鑫; 姜仁柱; 芶清泉

doi:10.11858/gywlxb.1990.02.005

D-D结合型金刚石聚晶的高压合成研究

doi: 10.11858/gywlxb.1990.02.005

1.
成都科技大学高温高压物理研究所，四川成都 610065；
2.
成都科技大学应用物理研究所，四川成都 610065

详细信息

通讯作者:
洪时明

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出版历程
- 收稿日期: 1989-08-14
- 修回日期: 1989-11-10
- 刊出日期: 1990-06-05

Experimental on Sintering Diamond with Direct Bonding between Diamond Particles

1.
Institute of High-Temperature and High-Pressure Physics, Chengdu University of Science and Technology, Chengdu 610065, China;
2.
Institute of Applied Physics, Chengdu University of Science and Technology, Chengdu 610065, China

More Information

Corresponding author: HONG Shi-Ming

摘要

摘要: 为了探索功能金刚石聚晶的高压合成，使其具有优异的透红外和散热性能，我们采取了提高合成压力、温度和尽量减少结合剂的办法进行试验。首先探索如何使合成的金刚石聚晶具有D-D型结合，然后尽量减少结合剂，以合成出高密度的D-D型金刚石聚晶。为了尽量减少结合剂含量，不用粉末混合法，而是分别采用7~14 m和63~80 m粒度的金刚石为原料，与纯Ni或Ni70Mn25Co5合金为基底积层组装，通过高温高压下触媒金属向金刚石晶粒间渗透进行烧结生长。在6.3 GPa的压力和1 440~1 650 ℃的不同温度下分别保持3~40 min。所得到的金刚石聚晶在触媒金属渗透得充分的区域形成了D-D结合型结构，而没有发现碳化物生成及金刚石表面石墨化等现象。
- D-D结合 /
- 连续相 /
- 金刚石聚晶
Abstract: Diamond powder was placed on the pure Ni or alloy Ni70Mn25Co5 substrate and held at high pressure of 6.3 GPa and high temperature of 1 440 to 1 650 ℃ for 3 to 40 minutes. Composition and microstructure of the sintering diamond were studied by the scanning electron microscopy, X-ray diffraction and Raman spectroscopy. It was observed clearly that the continuous phase between diamond particles was produced extensively in the region where metal was filtrated sufficient. No carbide or graphite was detected in that region and other places. Homogeneous and compact microstructure with the continuous phase between diamond particles was observed in all the sample with the size of 7 mm2 mm, which was sintered using diamond powder with the grain size of 7 to 14 m and the Ni70Mn25Co5 alloy as a substrate.
- D-D bonding /
- continuous phase /
- sintered diamond