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W-Cu Composite with High W Content Prepared by Grading Rounded W Powder with Narrow Particle Size Distribution
Zheng Chen1,2, Bingxue Li1, Qiao Zhang1,2
1School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China.
Abstract:
In this study, the W (10-20%)-Cu composites were simultaneously fabricated using commercial, graded commercial, and graded jet-milled W powder. The results show that the W-Cu composites prepared with the graded jet-milled W powders have the highest density and best comprehensive performance due to the combined effect of the particle gradation and jet-milling treatment. Particle gradation is employed to increase the packing density of powders, thereby increasing the relative density of the compressed W skeleton, and the rounded powder with narrow particle size distribution after jet-milling treatment is used to reduce the enclosed pores formed during the process of compacting and infiltration. W-Cu composites with a high density of 16.25 g/cm3 can be directly obtained by conventional compacting at a low pressure of 300 MPa and following infiltration.
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