Application of nanotechnology in a silver/graphite contact material and optimization of its physical and mechanical properties
来源期刊：Rare Metals2004年第1期
论文作者：YU Haifeng, LEI Jingxuan, MA Xueming, ZHU Lihui, LU Yao, XIANG Jing, and WENG Wei) School of Materials Science and Technology, Shanghai University, Shanghai , China) Physics Department, East China Normal University, Shanghai , China) Shanghai Electrical Apparatus Research Institute, Shanghai , China
文章页码：79 - 83
摘 要：<正> By applying nanotechnology, a new type of silver/graphite （AgC） electrical contact was fabricated and characterized. The AgC coating powders were obtained through high-energy ball milling and reducer liquid spraying-coating method. The as-prepared powders were examined by transmission electron microscope （TEM）, scanning electron microscope （SEM）, and X-ray diffraction （XRD）. The results show that the thickness of graphite flakes milled for 10 h is about 50-60 nm and the AgC coating powders exhibit flocculent structure with quite fine and homogeneous internal micropores. XRD implies that the average crystalline size of silver in coating powders is about 50 nm. The mechanical and physical properties of this newly developed AgC contact made from the above-mentioned nanocrystalline powders by traditional powder metallurgy technique were measured. Compared with its counterparts made from other techniques, the properties of this new AgC contact have been optimized. High surface energy and high-energy interfac
摘要：<正> By applying nanotechnology, a new type of silver/graphite （AgC） electrical contact was fabricated and characterized. The AgC coating powders were obtained through high-energy ball milling and reducer liquid spraying-coating method. The as-prepared powders were examined by transmission electron microscope （TEM）, scanning electron microscope （SEM）, and X-ray diffraction （XRD）. The results show that the thickness of graphite flakes milled for 10 h is about 50-60 nm and the AgC coating powders exhibit flocculent structure with quite fine and homogeneous internal micropores. XRD implies that the average crystalline size of silver in coating powders is about 50 nm. The mechanical and physical properties of this newly developed AgC contact made from the above-mentioned nanocrystalline powders by traditional powder metallurgy technique were measured. Compared with its counterparts made from other techniques, the properties of this new AgC contact have been optimized. High surface energy and high-energy interfac
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