Ti(C,N)基金属陶瓷中包覆结构的研究

A Study of Surrounding Structure in Ti(C,N) Based Cermet

利用先进的微观分析手段对Ｔｉ（Ｃ，Ｎ）基金属陶瓷中Ｔｉ（Ｃ，Ｎ）的包覆结构进行了较系统的研究，研究结果表明：在硬质相颗粒的周边，Ｔｉ和Ｎｉ元素具有明显的成分梯度，Ｗ和Ｍｏ元素主要集中分布于硬质相颗粒的包覆层中，并且其分布规律相似；Ｔｉ（Ｃ，Ｎ）芯与粘结相Ｎｉ之间存在的包覆层是一种过渡相，它改善了Ｎｉ对碳化物的润湿性，使粘结相与硬质相能较好地结合．

The surrounding structure of Ti(C, N) in Ti(C, N) based cermet has been investigated by advanced means in microstructure analysis. Experimental results show that there is an obvious composition gradient of elements Ti and Ni at the edge of the carbonitride phase. Elements W and Mo are distributed concentrically and similarly in surrounding layer of the carbonitride. There exists a surrounding layer, a transitional phase, between the Ti(C, N) core and the binder Ni. It is likely that the wettability of Ni on carbide is improved, so that the binder and the carbide are better combined.