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SHS等离子喷涂制备FeAl₂O₄-Al₂O₃-Fe纳米复合涂层的研究

Preparation nanostructured FeAl₂O₄-Al₂O₃-Fe composite coating by SHS plasma spraying technology

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【作者】牛二武；阎殿然；何继宁；董艳春；李香芝；冯文然；张建新；张古令；杨思泽；

【Author】 Niu Er-Wu~ 1)2) Yan Dian-Ran~ 1) He Ji-Ning~ 1) Dong Yan_Chun~ 1) Li Xian-Zhi~ 1) Feng Wen-Ran~ 2) Zhang Jian_Xin~ 1) Zhang Gu-Ling~ 2) Yang Si-Ze~ 2) 1)(Materials Science and Technology School, Hebei University of Technology, Tianjin 300132, China)2)(Institute of Physics, Chinese Academy of Science, Beijing 100080, China)

【机构】河北工业大学材料学院；中国科学院物理研究所；中国科学院物理研究所天津300132；北京100080；天津300132；

【摘要】利用SHS等离子喷涂技术,将经过机械团聚法制备的Fe2O3-Al复合粉体送入等离子焰流,沉积出厚度约为400μm的复合涂层.利用XRD,SEM和TEM等检测手段对涂层的成分和组织进行了分析,测定了涂层的显微硬度、断裂韧性以及耐磨性.结果表明涂层为具有纳米结构的FeAl2O4-Al2O3-Fe纳米复合组织;涂层的显微硬度为HV100g870;断裂韧性是普通Al2O3涂层的2倍;无润滑磨损的耐磨性是普通Al2O3涂层的2·5倍.更多还原

【Abstract】 In this paper, composite coating （about 400 μm thick） was prepared by SHS plasma spraying technology using micro-dimensional Fe₂O₃-Al composite feedstock, which was fabricated by mechanical glomeration. The composition and microstructure of the coating were analyzed by X-Ray diffraction, scanning electron microscopy and transmission electron microscopy. Meanwhile, the microhardness, fracture toughness and wear resistance were also measured. It shows that the skeleton of the coating is mainly composed of nanostructured FeAl₂O₄ and Al₂O₃, and the dispersed phase is nanosized Fe. The composite coating possesses satisfactory microhardness of about Hv870. Compared with conventional alumina coating, the fracture toughness and wear resistance of composite coating are increased by one and 1.5 times, respectively.更多还原