Influence of Milling and Use of Ni and Al Containing Metal Binder in NbC-Based Cermets

Abstract

This study presents the development of niobium carbide cermets bound to nickel and Ni-12Al (wt%). The use of and Ni aims to replace strategic elements such as cobalt (Co) utilized in tungsten carbide-based cermets. Cermets of different compositions were processed by conventional powder metallurgy. Microstructural analysis with semi-quantitative chemical analysis by EDX, Vickers microhardness and density measurement were performed to evaluate the influence of high energy milling application and sintering temperature on the properties of these cermets. A milling time of 20 min in a planetary mill and sintering temperatures of 1420 ºC or 1450 ºC resulted in homogeneous microstructures, densities close to 90% and hardness of around 1000 HV 1 , showing a potential for use of this material in cutting tools.

Microstructure and properties of (Ti, W) C-CoCrNi-xMo cermets

“…These voids may originate during the sintering process and tend to increase with higher Mo content, consequently reducing the material's density. 1,2,3,4,5 wt.%) cermets after vacuum sintering at 1, 400°C. The bending strength of the cermets showed a gradual decrease with increasing Mo content.…”

“…Cermets are crucial engineering materials known for their outstanding properties, including high-temperature resistance [1] , wear resistance [2][3][4] , and high hardness [5][6] , making them extensively utilized in cutting tools, molds, and wear-resistant components. Among these, (Ti, W) C-based cermets have gained major attention due to their exceptional performance, characterized by high hardness and remarkable wear resistance, and positioned as ideal metallic materials.…”