| Manufacture of high-dispersed W-Cu composite powder by mechano-thermal process |
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| 引用本文： | LI,Yun-ping(李云平),QU,Xuan-hui(曲选辉),ZHENG,Zhou-shun(郑州顺),YU,Shu(于澍). Manufacture of high-dispersed W-Cu composite powder by mechano-thermal process[J]. 中南工业大学学报(英文版), 2003, 10(3): 168-172. DOI: 10.1007/s11771-003-0002-1 |
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| 作者姓名： | LI Yun-ping(李云平) QU Xuan-hui(曲选辉) ZHENG Zhou-shun(郑州顺) YU Shu(于澍) |
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| 作者单位： | State Key Laboratory for Powder Metallurgy，Central South University，Changsha 410083，China，State Key Laboratory for Powder Metallurgy，Central South University，Changsha 410083，China，State Key Laboratory for Powder Metallurgy，Central South University，Changsha 410083，China，State Key Laboratory for Powder Metallurgy，Central South University，Changsha 410083，China |
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| 基金项目： | Project (59871064) supported by the National Nature Science Foundation of China |
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| 摘 要： | 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 ℃ is about 0. 5μm smaller than that reduced at 750 ℃. After sintering at 1 200℃ 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.
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| 收稿时间： | 2002-12-19 |
| 修稿时间： | 2003-06-19 |
Manufacture of high-dispersed W-Cu composite powder by mechano-thermal process |
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| Li Yun-ping , Qu Xuan-hui , Zheng Zhou-shun and Yu Shu. Manufacture of high-dispersed W-Cu composite powder by mechano-thermal process[J]. Journal of Central South University of Technology, 2003, 10(3): 168-172. DOI: 10.1007/s11771-003-0002-1 |
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| Authors: | Li Yun-ping Qu Xuan-hui Zheng Zhou-shun Yu Shu |
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| Affiliation: | (1) State Key Laboratory for Powder Metallurgy, Central South University, 410083 Changsha, China |
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| 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 °C from 700–750 °C owning to the lowering of particle size of the oxide powder. The average particle size of W-Cu powder after reduction at 650 °C is about 0.5 μm smaller than that reduced at 750 °C. After sintering at 1 200 °C 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. Foundation item: Project (59871064) supported by the National Nature Science Foundation of China |
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| Keywords: | mechano-thermal process W-Cu composite relative density thermal conductivity |
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