PREPARATION OF MICROARC OXIDATION COATINGS ON 6061 ALUMINUM ALLOYS AND THEIR THERMAL SHOCK RESISTANCE

被引：3

作者：

Xue, Wenbin ^{[1
]}

Zhang, Ying ^{[1
]}

Jiang, Xingli ^{[1
]}

Yang, Zhuo ^{[1
]}

机构：

[1] Beijing Normal Univ, Coll Nucl Sci & Technol, Key Lab Beam Technol & Mat Modificat, Minist Educ, Beijing 100875, Peoples R China

来源：

SURFACE REVIEW AND LETTERS | 2009年 / 16卷 / 03期

关键词：

Microarc oxidation; coatings; aluminum alloy; thermal shock resistance; ELECTROLYTIC OXIDE COATINGS; CERAMIC COATINGS; ARC OXIDATION; PLASMA; MICROSTRUCTURE; BEHAVIORS;

D O I：

10.1142/S0218625X09012779

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The thick ceramic coatings were prepared on 6061 aluminum alloys by microarc oxidation in a silicate electrolyte. The morphology and phase constituent of the coatings with different thickness were studied by scanning electron microscope, and X-ray diffraction. Scratch and thermal shock tests were employed to evaluate the adhesion between the coating and alloy substrate. The maximum microhardness and its position away from alloy/coating interface increases with increasing the coating thickness. The critical scratch force for the coating break was about 55 N in the 50 mu m thick coating. Thermal shock resistance of the coatings depend on their thickness and thinner coating has better thermal shock resistance. The coated alloy with 50 mu m thick coating can be subjected to 50 times thermal cycles of heating up to 500 degrees C followed by quenching into water.

引用

页码：393 / 399

页数：7

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