摘要
研究了采用不同放电等离子烧结(SPS)工艺获得的单质金属(Ni、Cu、Ag、Al)电极与Mg-Si-Sn基热电材料结合界面的微观形貌和成分分布特征,测试了合金(Ni-Al、Cu-Al)、金属/合金复合电极材料的热膨胀系数、电导率和热导率等物性参数。实验结果表明:通过SPS烧结可以有效实现电极材料与Mg-Si-Sn基材料的连接,复合电极材料Ni-Al/Al(60:40)和Cu-Al/Cu(45:55)具有高的电导率和热导率,并且热膨胀系数与Mg-Si-Sn基热电材料相匹配,有可能成为Mg-Si-Sn基材料的较理想电极材料。
Metal (Ni, Cu, Ag, A1) electrode was connected with Mg-Si-Sn based thermoelectric materials by Spark Plasma Sintering (SPS) process. Microstructure of interface, sintering process and transport properties, including elec- trical conductivity, thermal conductivity and thermal expansion coefficient, of electrode materials were investigated. The results showed that composites of Ni-A1/A1 (60:40) and Cu-A1/Cu (45:55) displayed high electrical conductivity, high thermal conductivity and suitable thermal expansion coefficient to Mg-Si-Sn based materials. It is indicated that the two composites have potential to be used as good electrode materials for, and to be connected by SPS sintering to, Mg-Si-Sn based materials.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2015年第6期639-646,共8页
Journal of Inorganic Materials
基金
国家重大基础研究计划973项目(2013CB632502)
国家自然科学基金(51402222
51172174
51401153)
国家111计划(B07040)~~
关键词
镁硅锡
热电材料
电极材料
Mg-Si-Sn
thermoelectric material
electrode material
作者简介
陈耿(1987-),男,硕士研究生.E—mail:chengengl7@126.com
通讯作者:刘桃香,副教授.E-mail:cxzwut@126.com;
唐新峰,教授.E-mail:tangxf@whut.edu.cn