超音速等离子制备多元铝青铜合金涂层的组织

Microstructure of Multi-element Aluminum Bronze Coatings Prepared by Supersonic Plasma Spraying

采用超音速等离子喷涂技术将新型多元铝青铜合金粉体喷涂在45号钢基体表面。运用XRD、SEM、EDS、EPMA等手段分析了涂层的组织特点及元素分布情况。结果表明,超音速等离子喷涂层主要由Cu9Al4、AlFe3、AlFe等相组成;涂层元素分布均匀;超音速等离子喷涂层硬度高于传统等离子喷焊层;涂层的结合强度为59.3MPa。可见,经过工艺参数的优化,超音速等离子喷涂可以制备出类似于多元铝青铜合金的易氧化涂层。

The multi-element aluminum bronze coatings were prepared on polished 45 steel substrate by a supersonic plasma spraying system.The microstructure of coatings and element distribution in the costings were observed by XRD（X-ray diffraction）,SEM（scanning electron microscope）,EDS（energy dispersive spectrometer） and EPMA etc.The results show that the coatings prepared are composed of Cu9Al4,AlFe3 and AlFe phases,and the elements are distributed uniformly into the coatings.The hardness of the coatings prepared by supersonic plasma spraying is superior to that prepared by the traditional plasma spraying.The bonding strength of coatings reaches 59.3 MPa.Easy oxidation coatings similar to multi-aluminum bronze can be prepared by plasma spraying with optimized processing parameters.