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W-15Cu composite powders prepared by mechanical alloying(MA)of raw powders were consolidated by spark plasma sintering(SPS)process at temperature ranged 1 230-1 300℃for 10 min and under a pressure of 30 MPa.By using high energy milling,particles containing very fine tungsten grains embedded in copper,called composite particles,could be produced.The W grains were homogeneously dispersed in copper phase,which was very important to obtain W-Cu alloy with high mechanical properties, fine and homogeneous microstructure.The microstructure and properties of W-15Cu alloys prepared by SPS processes at different temperature were researched.The results show that W-15Cu alloys consolidated by SPS can reach 99.6%relative density,and transverse rupture strength(TRS)is 1 400.9 MPa,Rockwell C hardness (HRC)is 45.2,the thermal conductivity is 196 W/m·K at room temperature,the average grain size is less than 2 μm,and W-15Cu alloy with excellent properties,homogeneous and fine microstructure is obtained.
W-15Cu composite powders prepared by mechanical alloying (MA) of raw powders were consolidated by spark plasma sintering (SPS) process at temperature ranged 1 230-1 300 ℃ for 10 min and under a pressure of 30 MPa. By using high energy milling , particles containing very fine tungsten grains embedded in copper, called composite particles, could be produced. The W grains were homogeneously dispersed in copper phase, which was very important to obtain W-Cu alloys with high mechanical properties, fine and homogeneous microstructure. microstructure and properties of W-15Cu alloys prepared by SPS processes at different temperatures were researched. The results show that W-15Cu alloys are consolidated by SPS can reach 99.6% relative density, and transverse rupture strength (TRS) is 1 400.9 MPa, Rockwell C hardness (HRC) is 45.2, the thermal conductivity is 196 W / m · K at room temperature, the average grain size is less than 2 μm, and W-15Cu alloy with excellent properties, homogeneous and fine microstructure is obtai ned.