放电等离子烧结制备Cu-15Cr-15W复合材料

Preparation of Cu-15Cr-15W composites by SPS

采用高能球磨和机械混粉等方法分别制备了3种Cu-15Cr-15W复合粉末,然后通过放电等离子烧结(SPS)制备了Cu-15Cr-15W合金。研究了不同混粉工艺对合金微观组织、物理与力学性能的影响。结果表明:采用高能球磨Cr、W粉末后机械混合Cu粉而制备的Cu-15Cr-15W复合粉末经SPS烧结所得铜合金的组织细小均匀,致密度99.3%,电导率2.95×107S/m,热导率212.0 W/(m·K),维氏硬度152HV0.5,抗拉强度和伸长率分别365 MPa和11.5%,各项性能均优于相同SPS工艺制备的Cu-30Cr合金。

In this paper,three Cu-15Cr-15W composite powders were prepared by high energy ball milling and mechanical mixing,and then Cu-15Cr-15W alloy was prepared by spark plasma sintering(SPS). The effects of different mixing processes on the microstructure,physical and mechanical properties of the alloy were studied.The results show that the microstructure of the copper alloy obtained by SPS of Cu-15Cr-15W composite powder,which is prepared first by high-energy ball milling of Cr and W powder and then mechanically mixed with Cu powder,is fine and uniform. The density is up to 99.3%,the conductivity is 2.95×107 S/m,the thermal conductivity is 212.0 W/(m · K),the Vickers hardness is 152 HV0.5,and the tensile strength and elongation is 365 MPa and 11.5%. The properties are much better than the Cu-30Cr alloy under the same SPS process.