采用蒸氨均相共沉淀法,即加热含有Cu2+和WO42-的氨络合物溶液,使氨蒸发,获得沉淀物,然后对沉淀物进行煅烧、还原,最终制得了含Cu量为20%的W-Cu复合粉.对沉淀物和W-Cu复合粉的组成和粒度等进行了表征.同时对于不同温度下烧结上述W-Cu复合粉压坯所得烧结体的微结构和物理、力学性能等进行了测试分析.试验结果表明,蒸氨均相共沉淀法制备的W-Cu复合粉体具有纳米粒度和均匀的化学组成,其烧结活性高,在较低温度下烧结即可达很高的致密化程度;所得烧结体具有良好的物理、力学性能.
参考文献
| [1] | Johnson J L;German R M .Advance in powder metallurgy and particulate materials[J].International Journal of Powder Metallurgy,1993,4:201-209. |
| [2] | David J W;Barabash V R;Makhankov A et al.Assessment of tungsten for use in ITER plasma facing components[J].Journal of Nuclear Materials,1998,258-263:308-312. |
| [3] | Sebastian KV .Properties of sintered and infiltrated tungsten-copper electrical contact material[J].International Journal of Powder Metallurgy,1981,17:297-303. |
| [4] | Fecht H J .Synthesis and properties of nanocrystalline metals and alloys prepared by mechanical attrition[J].Nano-Structured Materials,1992,1:125-130. |
| [5] | Kim B K;Choi C J .Fabrication of nanostructured powders by chemical processes[J].Scripta Materialia,2001,44:2161-2164. |
| [6] | Gusmano G.;Polini R.;Magistris P.;Marcheselli G.;Bianco A. .Chemical synthesis and sintering behaviour of highly dispersed W/Cu composite powders[J].Journal of Materials Science,2001(4):901-907. |
| [7] | G. G. Lee;G. H. Ha;B. K. Kim .Synthesis of high density ultrafine W/Cu composite alloy by mechano-thermochemical process[J].Powder Metallurgy,2000(1):79-82. |
| [8] | Kim T H;Kim J H;Yu J S et al.The mechanism of hydrogen reductions synthesis of nanocomposite W-Cu powders[J].Nano-Structured Materials,1997,9:213-216. |
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