首页> 外文期刊>Russian journal of physical chemistry, B. >Preparation of copper-molybdenum nanocrystalline pseudoalloys using a combination of mechanical activation and spark plasma sintering techniques
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Preparation of copper-molybdenum nanocrystalline pseudoalloys using a combination of mechanical activation and spark plasma sintering techniques

机译:使用机械活化和火花等离子体烧结技术的组合制备铜 - 钼纳米晶伪孔合金

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Nanostructured powders of pseudoalloys of immiscible Cu and Mo metals are prepared by highenergy ball milling (HEBM). Mechanical alloying in an Activator-2S planetary ball mill for 60 min provides a uniform distribution of refractory Mo particles in a moldable Cu matrix on submicron and nanoscopic levels. Nanostructured Cu-Mo powders are consolidated by spark plasma sintering (SPS) in a temperature range of 700-950A degrees C at a pressure of 50 MPa for 10 min. The effect of preparation conditions on the microstructure, crystal structure, and properties (density, hardness, electric resistivity) of the nanostructured Cu-Mo pseudoalloys is studied. It is shown that a combination of HEBM and SPS provides the formation of a high-density (97%) nanostructured consolidated Cu-Mo composite with a hardness of 3.68-3.88 GPa and an electric resistivity of 6.1-6.2 mu Omega cm; these parameters made the composite promising for use as an electric-contact material.
机译:通过高效球铣削(HEBM)制备不混溶CU和MO金属的伪结构粉末的纳米结构粉末。 活化剂-2S行星球磨机中的机械合金化60分钟在模亚微米和纳米镜水平上的可模塑的Cu基质中均匀分布难熔Mo颗粒。 纳米结构Cu-Mo粉末通过火花等离子体烧结(SPS)在700-950A℃的温度范围内,在50MPa的压力下10分钟。 研究了制备条件对纳米结构Cu-Mo伪合金的微观结构,晶体结构和性质(密度,硬度,电阻率)的影响。 结果表明,HEBM和SPS的组合提供了高密度(97%)纳米结构的固结Cu-Mo复合材料,其硬度为3.68-3.88GPa,电阻率为6.1-6.2μmomegacm; 这些参数使复合有前途用作电动接触材料。

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