摘要
采用冷喷涂方法制备Ni/Ti混合涂层,通过后续热处理研究Ni/Ti涂层中的扩散反应,并采用扫描电镜和X射线衍射仪对热处理后涂层的显微结构和形貌及相组成进行了表征。结果表明,低熔共晶物(β-Ti+Ti2Ni)易在富Ti核和Ti2Ni的界面或在Ti核中央形成,当热处理温度超过共晶反应温度时,低熔点共晶物发生熔化,从而在涂层的富Ti区域产生孔洞,涂层中的孔隙可以通过β-Ti的数量及分布进行控制。
A kind of Ni/Ti composite coating was prepared by cold spraying method, and the diffusion reaction in Ni/Ti coating under post-heat treatment was studied. The microstructure and morphology of the coating were analyzed by SEM, and the phase composition of the coating was characterized by XRD. The results show that the eutectic （β-Ti＋Ti2Ni） is formed easily at the interface between Ti-rich region and Ti2Ni or in the central of Ti-rich nucleus. When the heat treatment temperature is above the eutectic temperature, the pores are formed in the Ti-rich nuclear regions because of the eutectic melting. The pores in the coating can be controlled by improving the quantity and distribution of β -Ti.
出处
《热加工工艺》
CSCD
北大核心
2014年第12期170-173,共4页
Hot Working Technology
基金
西安石油大学博士基金资助项目(YS2903190516)
