Parameter optimization for plasma-sprayed Al2O3p/Al composite coatings on AZ31 magnesium alloy  

作　　者：马凯 孙大千 谷晓燕 李于朋 宣兆志 

机构地区：[1]School of Materials Science and Engineering, Jilin University, Changchun,130022. [2]College of Mechanical and Electrical Engineering, Changchun Institute of Technology, Changchun, 130012 [3]School of Materials Science and Engineering, Changehun University of Technology, Changchun, 130012

出　　处：《China Welding》2010年第1期15-20,共6页中国焊接（英文版）

基　　金：This research was supported by Jilin Province Science Foundation （No. 20090552）.

摘　　要：Al2O3p/Al composite coatings were prepared on the surface of AZ31 magnesium alloy by plasma spraying technology with mixed powders of Al and Al2O3. An orthogonal test containing six factors and five levels was carried out to acquire the optimum technical parameters. Mierostruetures and properties of the composite coatings were studied. The results show that the coatings consist of Al2O3 particulates distributed uniformly and Al matrix, and the interface between the particulate and matrix is continuous, compact and clean. With increasing the mass fraction of Al2O3 in the mixed powders, the volume fraction of Al2O3 in the coatings iacreases. The Al2O3p/Al composite coating with 14% Al2O3 volume fraction has more compact microstrueture and more satisfactory properties.Al2O3p/Al composite coatings were prepared on the surface of AZ31 magnesium alloy by plasma spraying technology with mixed powders of Al and Al2O3. An orthogonal test containing six factors and five levels was carried out to acquire the optimum technical parameters. Mierostruetures and properties of the composite coatings were studied. The results show that the coatings consist of Al2O3 particulates distributed uniformly and Al matrix, and the interface between the particulate and matrix is continuous, compact and clean. With increasing the mass fraction of Al2O3 in the mixed powders, the volume fraction of Al2O3 in the coatings iacreases. The Al2O3p/Al composite coating with 14% Al2O3 volume fraction has more compact microstrueture and more satisfactory properties.

关 键 词：plasma spraying Al2O3p/Al composite coating MICROSTRUCTURE parameter optimization 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TB331[金属学及工艺—金属材料]