【摘要】 运用多元离子复合渗镀合金的方法,采用自制的二元复合靶对Al2O3陶瓷表面进行Ni-Ti复合渗镀,实现了Al2O3陶瓷表面的合金化。采用EDS,SEM,XRD分析方法和声发射划痕试验对Al2O3陶瓷表面的沉积层进行了分析,研究了沉积层成分、物相以及界面结合强度。结果表明,沉积层中含有镍、钛、铁等元素,各元素分布较为均匀,没有明显的成分聚集现象;沉积层由镍钛的氧化物Ni[TiO3]、镍钛化合物Ni4Ti3、镍单相组成。沉积层与Al2O3陶瓷基体界面成分过渡连续,没有显著的微观和宏观缺陷;声发射划痕实验结果表明,沉积层与陶瓷基体结合得较好,在100N的最大载荷下,沉积层没有出现剥离和崩落现象。这一方法为Al2O3陶瓷表面合金化提供了新的途径。更多还原

【Abstract】 In this paper,alloying on the surface of Al₂O₃ ceramic was carried out by means of binary composite diffusion coating alloying technology,in which Ni-Ti binary composite target was applied.The diffusion coating alloy-layer and the combining interface were tested by EDS,SEM,XRD and scratching method.It was indicated that elements of Ni,Ti and Fe of alloy-layer were distributed uniformly;there is no obvious gathering phenomenon of composition.The transition layer of interface between diffusion layer and Al₂O₃ ceramic body was uniform and no macro and micro defects were observed.The result of scratching test indicated that the coating layer is combined well with ceramic body.Under the action of a maximum load of 100N,the alloy-layer of the majority specimen was not stripped and avalanched,all of which has supplied a new way of alloying on the surface of Al₂O₃ ceramic.更多还原