Microstructure and mechanical properties of TiN‐based cermet reinforced by Cr₃C₂ addition

Abstract

TiN‐based cermets with different Cr3C2 addition were prepared by conventional vacuum sintering. Effect of Cr3C2 on microstructure and properties of TiN‐based cermets were discussed. Owing to the formation of sound rims on TiN cores, ultrafine TiN‐based cermets with more uniform microstructure and finer grains were obtained with 1 wt% Cr3C2. When the added Cr3C2 content enhanced from 0 to 2 wt%, the transverse rupture strength (TRS) and fracture toughness increased firstly and then decreased, while the hardness increased monotonically. For the experimental conditions considered, the cermet with 1 wt% Cr3C2 addition had optimal combination of hardness (91HRA), fracture toughness (14.7 MPa m1/2) and TRS (2123 MPa).

Microstructure, interfacial characteristics, and wear performances of Cu–Fe–SiC cermet composites

“…Powder metallurgy is widely used in the preparation of cermet composites due to its high density and excellent mechanical properties. 10,21,22 However, the mechanical properties and grinding properties of cermets prepared by powder metallurgy are still less studied.…”

“…tested the grinding performance of the prepared Cu/SiC composites by dry sliding wear test and the results showed that, compared with the traditional sintering process, the compressive stress applied in the sintering process increased the density, hardness, and wear of sintered materials. Powder metallurgy is widely used in the preparation of cermet composites due to its high density and excellent mechanical properties 10,21,22 . However, the mechanical properties and grinding properties of cermets prepared by powder metallurgy are still less studied.…”