蒲飞,刘元富,徐向阳,彭彦博

• 1:北京交通大学机械与电子控制工程学院材料研究中心

摘要(Abstract)：

以Al-TiC混合粉末为原材料,采用激光表面合金化技术,在电解镍基材表面原位合成了TiC增强Ni3Al基复合涂层,分析了涂层的显微组织结构,通过溶解热力学计算研究了TiC的溶解及析出规律,对比了原始TiC粉末与原位析出TiC颗粒的形貌特征。结果表明:涂层主要由金属陶瓷相TiC及金属间化合物Ni3Al组成,激光表面合金化过程中,原始TiC粉末在Ni-Al合金熔体中发生溶解,然后在合金熔池中重新凝固析出,以原位增强颗粒的形式弥散分布于Ni3Al金属间化合物基体上,原位析出的TiC增强颗粒尺寸显著小于原始TiC粉末。

关键词(KeyWords)： 激光表面合金化;涂层;TiC;显微组织

Abstract:

Keywords:

基金项目(Foundation): 清华大学摩擦学国家重点试验室开放基金(SKLTKF11B09)

作者(Author): 蒲飞,刘元富,徐向阳,彭彦博

DOI: 10.13289/j.issn.1009-6264.2014.11.034

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