Effect of Additives on Microstructure and Properties of W-Cu Alloys AITranslate

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Chinese Library Classification Number:TG146.41[金属学及工艺—金属材料]

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Using copper powder and tungsten powder as raw materials,W-Cu alloys were prepared by mechanical alloying and spark plasma sintering.The effects of different sintering temperatures and the additions of Y₂O₃ and Cr additives on the microstructure and physical and mechanical properties of the alloys were analyzed using SEM,XRD,Vickers hardness tester,electron densitometer,and conductivity tester.The experimental results show that as the sintering temperature increases,the distribution of W and Cu phases becomes more uniform,and the density,hardness,and conductivity of the alloys increase.The W-Cu alloy prepared at a sintering temperature of 1100℃exhibits the best comprehensive physical and mechanical properties.With the increase in Y₂O₃ content,the grains of the W-Cu alloys become finer,the hardness increases,while the density and conductivity decrease.In addition,with the increase in Cr content,the conductivity of the W-Cu alloys decreases,but the hardness and density increase slightly and then decrease significantly.The W-Cu-0.5Cr alloy possesses the best comprehensive physical and mechanical properties.Therefore,adding a small amount of additives can effectively improve the microstructure and physical and mechanical properties of the SPS products(W-Cu alloys).