朱流,罗来马,吴玉程,程继贵

• 1:台州学院机械工程学院
• 2:合肥工业大学材料科学与工程学院

摘要(Abstract)：

采用非贵金属活化预处理对TiC陶瓷粉体进行化学镀前处理,预处理后通过常温超声波辅助化学镀方法成功制备了Ni包覆TiC陶瓷粉体,通过场发射扫描电子显微镜(FE-SEM)和能谱(EDS)研究分析了原始TiC粉体、非贵金属活化预处理后TiC粉体和Ni包覆TiC粉体表面形貌,探讨了化学镀Ni包覆TiC陶瓷粉体的生长机理。结果表明:非贵金属活化预处理后TiC陶瓷粉体表面出现了大量的缺陷(台阶),化学镀Ni包覆TiC陶瓷粉体表面Ni层覆盖完整、致密均匀;Ni颗粒的形核、长大和聚集的过程为:化学镀溶液中的反应物在TiC表面缺陷上吸附,发生氧化-还原反应沉积出Ni颗粒;Ni颗粒依附"线条状"突起以"线型"方式长大、弯曲、分叉和聚集,而后缠绕成"胞状"结构,犹如"缠毛线团"。"胞状"结构Ni颗粒不断长大聚集,最后成膜。

关键词(KeyWords)： 非贵金属活化预处理;化学镀;Ni包覆TiC陶瓷粉体;生长机理

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金青年项目(51204064);; 浙江省自然基金向上项目(LY12E02003);; 浙江省工量刃具重点实验室开放基金(ZD201205)

作者(Author): 朱流,罗来马,吴玉程,程继贵

DOI: 10.13289/j.issn.1009-6264.2013.03.004

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