Behaviour of cobalt infiltration and abnormal grain growth during sintering of diamond on cobalt substrate
Behaviour of cobalt infiltration and abnormal grain growth during sintering of diamond on cobalt substrate
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DOI：
10.1007/bf01106798
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发表时间：
1988-11
影响因子：
4.5
通讯作者：
Shiming Hong;M. Akaishi;H. Kanda;T. Osawa;S. Yamaoka;O. Fukunaga
中科院分区：
文献类型：
--
作者：
Shiming Hong;M. Akaishi;H. Kanda;T. Osawa;S. Yamaoka;O. Fukunaga
将金刚石压坯置于钴盘上，在1350~1500℃的高温下保持5.8 Gpa的高压，考察了熔融钴在金刚石压坯中的渗透行为。原始金刚石粉末的粒度越大，保温温度越高，钴越容易渗入金刚石压坯。这种渗透被认为是由于金刚石颗粒之间形成的空隙中的负压造成的。虽然在钴浸渗过程中金刚石粉末得到了固结，但由于金刚石压块溶解和析出到熔融的钴中，在钴与金刚石压块的交界处也观察到了异常的颗粒长大。
The infiltration behaviour of molten cobalt into a diamond powder compact was examined when the latter was placed on a cobalt disc and held at high pressure of 5.8 GPa and high temperature of 1350 to 1500° C. The larger the grain size of the starting diamond powder and the higher the holding temperature, the more easily cobalt infiltrated into the diamond compact. The infiltration is considered to occur because of the negative pressure in the voids formed between diamond grains. Although diamond powder was consolidated in this process of cobalt infiltration, abnormal grain growth was also observed in the boundary between cobalt and diamond compact because of the dissolution and precipitation process of the compact into molten cobalt.