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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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喷射电沉积co--ni纳米合金沉积层的组织和性能
Keywords: 金属材料,纳米晶co-ni合金,电沉积,组织结构
Abstract:
？用高速喷射电沉积法快速制备了块体纳米晶co--ni合金,研究了喷镀工艺参数(主盐浓度、电解液喷射速度和电流密度等)对沉积层成分、微观组织结构及性能的影响.结果表明:提高喷射电沉积电解液的搅拌强度能有效减小扩散层的厚度,使电沉积在较高的极限电流密度下进行,提高沉积速度.极限电流密度的增大使阴极过电位增大,从而提高合金的形核速率,使沉积层晶粒的尺寸减小、显微硬度升高.随着电解液中co$^{2+}$含量的增加,沉积层中co含量增加,导致沉积层相结构由单相$\alpha$--co(ni)转变为$\alpha$--co(ni)和$\varepsilon$--co(ni)双相组织,并使表面的形貌发生明显的变化.
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