Progress on the preparation technology,microstructure and properties of W-Cu composites
W-Cu composites is a structural and functional integrated material composed of W and Cu,exhibiting exceptional properties such as high hardness,strength,thermal stability,wear resistance,low coefficient of ther-mal expansion,good ablative resistance and conductivity.It finds extensive applications in electronic,electrical,aerospace and military industries.However,commercial W-Cu composites prepared through high temperature in-filtration or liquid phase sintering often possess coarse structures with inferior mechanical properties.As China's industrial modernization progresses rapidly,higher requirements are also put forward for the comprehensive properties of W-Cu composites.As a result,the preparation technology of W-Cu powder and blocks has greatly accelerated the development of W-Cu composites in recent years.This review summarizes the mechanisms and characteristics of different forming technologies and powder preparation techniques for W-Cu composites,along with an analysis of their microstructure and properties.Finally,future trends for the development of W-Cu com-posites are discussed.
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