(Ti,W)C-Ni cermets by laser engineered net shaping

被引：17
|
作者：
Xiong, Y. [2 ]
Kim, M. [1 ]
Seo, O. [1 ]
Schoenung, J. M. [2 ]
Kang, S. [1 ]
机构：
[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151742, South Korea
[2] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA
来源：
POWDER METALLURGY | 2010年 / 53卷 / 01期
基金：
美国国家科学基金会;
关键词：
(Ti; W)C-Ni; Laser engineered net shaping; Sintering; Microstructure; Mechanical properties; FABRICATION;
D O I：
10.1179/174329009X380581
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effect of the laser engineered net shaping (LENS) process on the microstructure and mechanical properties of (Ti,W)C-Ni solid solution cermets was investigated. Nano-(Ti,W)C-Ni powder was synthesised, spray dried and densified by two different processes: sintering and LENS. Furthermore, all results were compared with conventional micrometre sized TiC-WC-Ni cermets. Solid solution (Ti,W)C-Ni cermets made by sintering resulted in a coreless and ultra fine microstructure, while the LENS processed specimens revealed inhomogeneous microstructure and particle coarsening. The hardness values of the LENS processed specimens range from 15 to 20 GPa, which is higher than for the ultra fine and conventional sintered composites (similar to 12 GPa). The measured toughness values show greater variability.
引用
收藏
页码：41 / 46
页数：6
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