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研究了于镍基合金表面低温包埋渗铝的可行性。包埋渗涂层为双层结构,外层主要由Al3Ni2和Al3Ni相组成,内层主要由Al3Ni2相组成。之后研究了实验条件对涂层微观结构和元素分布的影响。结果显示,除催化剂含量外,其余所有因素只影响涂层的厚度,并不影响其微观结构和元素分布。催化剂的含量既不影响涂层厚度,又不影响涂层的微观结构和元素分布。涂层厚度和沉积时间遵循抛物线规律说明实验进程为扩散控制。然后本文进一步证明了涂层厚度与沉积温度的倒数之间存在线性关系。
The feasibility of low temperature embedding aluminizing on the surface of Ni-based alloys was studied. The embedding and coating layer is a double-layer structure, the outer layer is mainly composed of Al3Ni2 and Al3Ni phases, and the inner layer is mainly composed of Al3Ni2 phase. After that, the effects of experimental conditions on the microstructure and elemental distribution of the coating were investigated. The results show that, with the exception of the catalyst content, all other factors affect the thickness of the coating without affecting its microstructure and elemental distribution. The catalyst content neither affects the thickness of the coating nor affects the microstructure and elemental distribution of the coating. Coating thickness and deposition time follow the parabolic law shows that the experimental process for diffusion control. This paper further proves that there is a linear relationship between the coating thickness and the reciprocal of the deposition temperature.