您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 15    No. 3    June 2005

[PDF Download]    [Flash Online]

    

Amorphous coatings deposited on aluminum alloy by plasma electrolytic oxidation
GUAN Yong-jun(关永军),  XIA Yuan(夏 原)

Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China

Abstract:Amorphous [Al-Si-O] coatings were deposited on aluminum alloy by plasma electrolytic oxidation(PEO). The process parameters, composition, micrograph, and mechanical property of PEO amorphous coatings were investigated.  It is found that the growth rate of PEO coatings reaches 4.44μm/min if the current density is 0.9mA/mm2.  XRD results show that the PEO coatings are amorphous in the current density range of 0.3-0.9mA/mm2. EDS results show that the coatings are composed of O, Si and Al elements. SEM results show that the coatings are porous. Nano indentation results show that the hardness of the coatings is about 3-4 times of that of the substrate, while the elastic modulus is about the same with the substrate. Furthermore, a formation mechanism of amorphous PEO coatings was proposed.

 

Key words: plasma electrolytic oxidation; amorphous coatings; aluminum alloy

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn