Manufacture of high-dispersed W-Cu composite powder by mechano-thermal process

来源期刊：中南大学学报(英文版)2003年第3期

论文作者：李云平 曲选辉 郑州顺 于澍

文章页码：168 - 172

Key words：mechano-thermal process; W-Cu composite; relative density; thermal conductivity

Abstract: In order to improve the process of co-reduction of oxide powder, a new mechano-thermal process was designed to produce high-dispersed W-Cu composite powder by high temperature oxidation, short time high-energy milling and reduction at lower temperature. The particle size, oxygen content and their sintering abilities of W-Cu composite powder in different conditions were analyzed. The results show that after a quick milling of the oxide powder for about 3-10 h, the reduction temperature of the W-Cu oxide powder can be lowered to about 650℃from 700-750℃owning to the lowering of particle size of the oxide powder. The average particle size of W-Cu powder after reduction at 650 ⁰C is about 0. 5 um smaller than that reduced at 750 ⁰C.After sintering at 1200 ⁰C for 1 h in hydrogen atmosphere, the relative density and thermal conductivity of final products ( W-20Cu) can attain 99. 5 %and 210 W·m^-1·K^-1 respectively.