Affiliation of Author(s):材料科学与技术学院
Journal:INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
Key Words:Graded Ti(C, N)-based cermets Nitrided Microstructure Hardness Surface
Abstract:The effects of nitrided treatment during different sintering stages on the microstructure and mechanical properties of Ti(C, N) based cermets were studied. The results showed that: compared with the sample sintered in vacuum, the surface microstructures of these samples which nitrogen gas was introduced in entire stage, heating stage and final sintering stage changed obviously, the porosity greatly increased, and the mechanical properties decreased dramatically. However, the sample which nitrogen gas was introduced at cooling stage had formed an about 10 pm graded surface layer enriched in hard phase and deficient in binder phase, the surface microhardness improved significantly from 14.33 to 18.11 GPa, and the transverse rupture strength (TRS) was basically unchanged. (C) 2016 Elsevier Ltd. All rights reserved.
ISSN No.:0263-4368
Translation or Not:no
Date of Publication:2017-01-01
Co-author:Zhao, Yijie,李一,周伟,Zhang, Guotao,Zhang, Jiajie,Xiong, Weihao
Correspondence Author:zy
Date of Publication:2017-01-01