Microstructure and Properties of W-15Cu Alloys Prepared by Mechanical Alloying and Spark Plasma Sint

• 作 者: ZHANG Qiaoxin SHI Xiaoliang YA
• 机 构: School of Mechanical and Electronic Engineering,State Key Laboratory of Advanced Technology for Mate
• 出 处: 武汉理工大学学报（材料科学版）（英文版）
• 发表日期: 2004年期
• 关键词: W-15Cu mechanical alloying spark plasma sintering (SPS)

W-15Cu composite powders prepared by mechanical alloying (MA) of raw powders were consolidated by spark plasma sintering (SPS) process at temperature ranged 1230-1300℃ for 10min and under a pressure of 30MPa. 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 1400.9MPa, Rockwell C hardness (HRC) is 45.2, the thermal conductivity is 196W/m·K at room temperature, the average grain size is less than 2μm, and W-15Cu alloy with excellent properties, homogeneous and fine microstructure is obtained.