Affiliation of Author(s):材料科学与技术学院
Journal:CERAMICS INTERNATIONAL
Key Words:Ti(C,N)-based cermets Carbothermal reduction Microstructure Mechanical properties
Abstract:Ti(C,N)-based cermets were prepared by in situ carbothermal reduction of TiO2 and subsequent liquid phase sintering in one single process in vacuum. The densification behavior, phase transformation, and microstructure evolution of the cermets were investigated by DSC, XRD, SEM, and EDX. The results showed that the carbothermal reduction of TiO2 was completed below 1250 degrees C, and Ti(C,N)-based cermets with refined grains were obtained after sintered at 1400 degrees C for 1 h by this method. The hard phase of the cermets mainly exhibited white core/gray rim structure, in great contrast to the typical black core/gray rim structure of hard phase in traditional cermets. Ti(C,N)-based cermets prepared by this novel method showed excellent mechanical properties with a transverse rupture strength of 2516 +/- 55 MPa, a Rockwell hardness of 88.6 +/- 0.1 HRA, and a fracture toughness of 18.4 +/- 0.7 MPa m(1/2), respectively.
ISSN No.:0272-8842
Translation or Not:no
Date of Publication:2018-02-15
Co-author:Zhang, Guotao,周伟,Zhao, Yijie,Zhang, Jiajie,Ke, Zheng,Yu, Lixin
Correspondence Author:zy
Date of Publication:2018-02-15