Affiliation of Author(s):材料科学与技术学院
Journal:CERAMICS INTERNATIONAL
Key Words:Graded Ti(C, N)-based cermets Low-pressure carburizing treatment Microstructure Hardness Surface
Abstract:Functionally graded Ti(C, N)-based cermets were prepared by a cost-effective and environment-friendly procedure which combined vacuum sintering with low-pressure carburizing treatment during liquid phase sintering stage in one cycle. The prepared cermets were investigated using scanning electron microscope (SEM), energy dispersive X-ray analysis (EDX), electron probe microanalysis (EPMA) and X-ray diffraction (XRD), which revealed that a considerable thick nickel-deficient layer was introduced due to the fast diffusion of carbon inwards at 1400 C. Moreover, the thickness of binder-deficient layer of graded cermets gradually increased with increasing carburizing time, but the amplitude of deficient nickel of the original surface dramatically decreased. Typically, Ti(C, N)-based cermets carburized for 40 min possessed a 600 gm deep nickel-deficient layer, and showed excellent mechanical properties with surface hardness of 1753(-73)(+63) HV and TRS of 2092(-146)(+117) 6 MPa.
ISSN No.:0272-8842
Translation or Not:no
Date of Publication:2017-02-01
Co-author:Zhao, Yijie,周伟,Zhang, Jiajie,Zhang, Guotao,Xiong, Weihao
Correspondence Author:zy
Date of Publication:2017-02-01