杨效田,付小月,冯力,安国升,李文生.真空扩散原位合成NiCoCrAlY涂层及其抗氧化性能[J].稀有金属材料与工程,2020,49(5):1750~1756.[yangxiaotian,fuxiaoyue,fengli,anguosheng,liwensheng.NiCoCrAlY coating of in-situ synthesis by vacuum diffusion and its oxidation resistance[J].Rare Metal Materials and Engineering,2020,49(5):1750~1756.]
真空扩散原位合成NiCoCrAlY涂层及其抗氧化性能
投稿时间:2019-03-16  修订日期:2019-05-15
中文关键词:  冷喷涂  NiCoCrAlY合金涂层  微观组织形貌  元素扩散  界面
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:
      采用机械混合的方法将Ni,Co,Cr,Al,Y的单质粉末按照4:2:1.5:1:0.03的比例机械混合4 h后,利用低压冷喷涂设备(GDU-3-15)在310S不锈钢基体表面沉积厚度为160 μm的混合粉体涂层,将制备好的样品置于真空管式炉(TL1700)中进行热扩散原位合成合金涂层处理。采用扫描电子显微镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)、显微硬度计等方法对喷涂态及扩散合成的NiCoCrAlY合金涂层的显微组织、物相组成、显微硬度等进行对比研究。结果表明:冷喷涂制备的NiCoCrAlY混合粉体涂层主要以单质元素混合存在,经过1100 ℃/4 h真空扩散后,涂层中发生了元素的扩散和冶金反应,涂层与基体间有扩散现象发生,形成明显的冶金结合,氧化实验表明,原位扩散合成的NiCoCrAlY涂层的试样氧化增重明显低于纯基体试样,能对基体起到很好的保护作用,有效地保护了基体不被快速氧化。
NiCoCrAlY coating of in-situ synthesis by vacuum diffusion and its oxidation resistance
英文关键词:Cold spraying  NiCoCrAlY alloy coating  Microstructure morphology  Element diffusion  Interface
英文摘要:
      The mixture of Ni, Co, Cr, Al, Y powders were prepared by mechanically mixing method for 4 hours with the ratio of 4:2:1.5:1:0.03 of Ni, Co, Cr, Al, and Y, and the deposited mixed powder coating with a thickness of 150 μm was prepared on the 310s stainless steel substrate by using the low-pressure cold spray equipment (GDU-3-15). The sample was placed to a vacuum tube furnace (TL1700) for thermal diffusion treatment. The microstructure, phase composition and microhardness of in-situ synthesis NiCoCrAlY alloy coatings were analyzed by Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffractometry (XRD) and microhardness tester, et al. The results show that the mixed powder coating of Ni, Co, Cr, Al,Y prepared by the cold spraying is mainly constituted with simple elements. However, the diffusion reaction of the elements occurs in the coating after vacuum diffusion at 1100 ℃ for 4 h. Simultaneously, there is a diffusion phenomenon between the coating and the substrate, which forms an obvious metallurgical bond. Oxidation experiments show that the NiCoCrAlY coating of in-situ synthesis exhibited significantly lower oxidation weight gain than the pure substrate, which can protects the substrate from rapid oxidation effectively.
作者单位E-mail
杨效田 兰州理工大学材料学院 398830990@qq.com 
付小月 兰州理工大学材料学院 978575878@qq.com 
冯力 兰州理工大学材料学院  
安国升 兰州理工大学材料学院  
李文生 兰州理工大学材料学院  
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