Formation and infrared emissivity of microarc oxidation coatings on Mg-7Li alloy

被引：3
|
作者：
Li Jungang [1 ]
Lv Ying
Wang Hongwei [1 ]
Zhu Zhaojun [1 ]
Wei Zunjie [1 ]
Meng Xiangcai
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
来源：
ADVANCED MATERIALS AND PROCESSES II, PTS 1-3 | 2012年 / 557-559卷
关键词：
Mg-7Li alloy; Microarc oxidation; Coatings; Microstructure; Infrared emissivity; CORROSION;
D O I：
10.4028/www.scientific.net/AMR.557-559.1975
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ceramic coatings were successfully fabricated on Mg-7Li alloy in Na2SiO3 electrolyte by microarc oxidation (MAO). The phase composition, formation mechanism and infrared emissivity of the coatings were investigated. Results show that the surface of MAO coating exists some micropores with a diameter of 2-6 mu m due to electric breakdown. The MAO coating with 13 mu m thickness is mainly composed of MgO, Li2O2 and Mg2SiO4. The infrared emissivity of the MAO coating is higher than that of bare Mg-7Li alloy, mainly because the coating consisting of ionic crystals has lower lattice vibration symmetry and larger dipole moment.
引用
收藏
页码：1975 / 1978
页数：4
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