通过AC-HVAF方法制备铁基非晶合金涂层的结构分析

摘要

本研究通过活性燃烧高速燃气喷涂(AC-HVAF)方法制备出了均匀致密的铁基非晶化合金涂层。通过调制AC-HVAF喷涂过程的工艺参数，研究了喷涂枪长、喷涂距离和送粉率对涂层非晶化程度的影响，得出控制枪长是形成高质量非晶化涂层的关键，而喷涂距离和送粉率决定了涂层的厚度和形成速率。制备出的铁基非晶合金与基体结合致密，孔隙率较低，完全的非晶化结构有效的保持了铁基非晶合金优异的力学性能，可以对基体材料进行很好的防护。%The uniform and compact Fe-based amorphous alloy coating was prepared by active combustion high velocity air fuel (AC-HVAF) spray method. By tuning the parameters of AC-HVAF spray process, the influence of the spraying gun length, spraying distance, and powder feed rate on non-crystallization has been studied carefully. Results indicate that spraying gun length is the key factor in forming perfect amorphous coating. Spraying distance and powder feed rate may determine the thickness and formation rate of the coating. The prepared coatings have a tight adhesion with the substrate, low porosity, and good non-crystallization, which would effectively maintain the excellent mechanical properties of the Fe-based amorphous alloy. The coating can provide a good protection for the substrate material.