Ti(C, N)‎-Based Cermets with Two Kinds of Core-Rim Structures Constructed by β-Co Microspheres

Abstract EN

Ti(C, N)-based cermet materials represent the best choice of materials for the manufacturing industry and military products.

In this study, we use cubic β-cobalt(β-Co) as the binder phase to strengthen constructed cermets.

At the same time, to optimize the microstructure, (Ti, W, Mo, Ta) (C, N) powders are added to form two kinds of core-rim morphologies.

Here, β-cobalt powders with face-centered cubic structures are obtained by the solid-phase reaction of high-energy ball milling.

A solid-phase chemical reaction and a carbothermic reduction-nitridation method are used to prepare the (Ti, W, Mo, Ta) (C, N) powders.

In our process, first we mix the cobalt and (Ti, W, Mo, Ta) (C, N) powders; then we press the powder mixtures into rectangular samples and sinter them in a pressure sintering furnace to obtain Ti(C, N)-based cermets with two kinds of core-rim structure, that is, black core/white rim and white core/gray rim.

The results show that the new cermets demonstrate excellent toughness and performance.