Journal of Inorganic Materials ›› 2020, Vol. 35 ›› Issue (6): 729-734.DOI: 10.15541/jim20190243

• RESEARCH LETTERS • Previous Articles    

High-purity Ti2AlC Powder: Preparation and Application in Ag-based Electrical Contact Materials

DING Jianxiang1,HUANG Peiyan1,ZHA Yuhui1,WANG Dandan2,ZHANG Peigen2,TIAN Wubian2(),SUN Zhengming2()   

  1. 1. Key Laboratory of Green Fabrieation and Surface Technology of Adranced Metal Materials, Ministry of Education, School of Materials Science and Engineering, Anhui University of Technology, Ma’anshan 243002, China
    2. School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
  • Received:2019-05-23 Revised:2019-07-14 Published:2020-06-20 Online:2019-09-12
  • Supported by:
    National Natural Science Foundation of China(51731004);National Natural Science Foundation of China(51671054);Fundamental Research Funds for the Central Universities in China(2242018K40108);Fundamental Research Funds for the Central Universities in China(2242018K40109);Natural Science Foundation of Jiangsu Province(BK20181285);Yarth Research Fand Project of Anhui University of Technology


Ag-based electrical contact is the "heart" of low-voltage switch, and the Cd toxicity has long been a haunting problem. It is the research focus of the low-voltage switch to find new environment-friendly electrical contact materials. Starting from the design of reinforcement for Ag-based electrical contact in this work, the high-purity Ti2AlC powder (99.2%) was synthesized by a simple and fast pressureless technique. Ag/Ti2AlC composite electrical contact material was also prepared with homogeneous structure, good bonding between Ag and Ti2AlC particles, high relative density (95.7%), moderate hardness (96HV), satisfactory electrical conductivity (low resistivity of 79.5 nΩ·m), and favorable arc erosion resistance (mass loss of 4.4% after 5610 arc discharging cycles). These excellent structure and properties of Ag/Ti2AlC composite are mainly attributed to the good thermal and electrical conductivity of Ti2AlC and the good wettability between Ag and Ti2AlC. This composite is expected to replace the conventional electrical contact materials in the future.

Key words: Ti2AlC, electrical contact, metal-ceramic composite, conductivity, wettability, arc erosion resistance

CLC Number: