Densification and grain growth of W-Cu composite powders synthesized by sol-spray drying

作者：Guo Yao Feng; Fan Jing Lian^*; Liu Tao; Yu Lin

来源：Materials Science and Engineering of Powder Metallurgy, 2013, 18(3): 384-389.

• Composite powders
• Grain growth behavior
• Liquid sintering
• Relative density
• Sintering temperatures
• Theoretical density
• W-Cu
• W-Cu composites

W-25Cu/W-30Cu composite powders fabricated by sol-spray drying method were sintered at 1300~1420°C for 15~120 min. The densification and grain growth behavior of the composite were studied. The results show that, the densification of W-25Cu/W-30Cu composite gradually increases with increasing sintering time and temperature. The relative density of W-25Cu and W-30Cu composite materials sintered at 1420°C for 120 min are 98.09% and 99.13%, respectively, which approach to the full theoretical density. Meanwhile, the grain growth of W-25Cu/W-30Cu composite sintered at 1380°C for 30~120 min is in accord with dissolved-precipitation mechanism, and the effect of sintering temperature on grain growth is more significant than that of the composition. After sintering at 1420°C for 120 min, the grain size of W-25Cu andW-30Cu are 1.17 μm and 1.13 μm, respectively.

• 出版日期2013
• 单位中南大学