Formation of core/rim structures in Ti(C,N)-WC-Ni cermets via a dissolution and precipitation process
Formation of core/rim structures in Ti(C,N)-WC-Ni cermets via a dissolution and precipitation process
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DOI：
10.1111/j.1151-2916.2000.tb01415.x
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发表时间：
2000-06-01
影响因子：
3.9
通讯作者：
Kang, S
中科院分区：
文献类型：
--
作者：
Ahn, SY;Kang, S
研究了Ti（C，N）-xWC-20 Ni体系化合物的核/边结构，以确定WC和N含量对体系显微组织的影响。此外，通过分析边缘成分研究了WC在系统中对Ti（C，N）的相对溶解速率。作为添加剂，WC含量的变化对总体显微组织的影响比先前研究中使用的其他碳化物的影响小得多。而Ti（C1-xNx）中的氮含量对其显微结构有显著影响。在给定的加工条件下，边缘结构的组成由溶解在液体粘合剂中的溶质的比率确定。在1300 ℃和1510 ℃的温度下，WC的溶解速率分别比Ti（C，N）的溶解速率快2倍和5倍。结果已被解释的相稳定性和沉淀现象。
The core/rim structures of compounds in the Ti(C,N)-xWC-20Ni system have been investigated to determine the effect of WC and nitrogen content on the microstructure of the system. In addition, the relative dissolution rate of WC to Ti(C,N) in the system was studied by analyzing the rim compositions, Variations in the WC content had a much-lesser influence, as an additive, on the general microstructure than that of other carbides that have been used in previous studies. However, the nitrogen content in Ti(C1-xNx) had a significant effect on its microstructure. The composition of the rim structure was determined by the ratio of solutes that were dissolved in the liquid binder, under the given processing conditions. The dissolution rate of WC was similar to 2 and 5 times faster than that of Ti(C,N) in the system at temperatures of 1300 degrees and 1510 degrees C, respectively. The results have been interpreted in terms of phase stability and precipitation phenomena.