Incorporation of zirconia into coatings formed by DC plasma electrolytic oxidation of aluminium in nanoparticle suspensions

被引：158
|
作者：
Matykina, E. [1 ]
Arrabal, R. [1 ]
Monfort, F. [1 ]
Skeldon, P. [1 ]
Thompson, G. E. [1 ]
机构：
[1] Univ Manchester, Sch Mat, Ctr Corros & Protect, Manchester M60 1QD, Lancs, England
来源：
APPLIED SURFACE SCIENCE | 2008年 / 255卷 / 05期
基金：
英国工程与自然科学研究理事会;
关键词：
Aluminium; Plasma electrolytic oxidation; Oxide coatings;
D O I：
10.1016/j.apsusc.2008.08.036
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：
A study has been carried out to investigate the incorporation of zirconia into alumina-based coatings formed on aluminium using DC plasma electrolytic oxidation in phosphate and silicate electrolytes containing zirconia nanoparticles in suspension. The nanoparticles were incorporated mainly near the coating surface and within cavities inside the coatings. Additionally, a silicon-rich, surface deposit appeared to entrain the nanoparticles of the silicate electrolyte. Zirconia was also present in cellular microstructures of the main alumina-rich coating layers, suggesting melting at > 1710 degrees C and subsequent solidi. cation. The coatings frequently contained tetragonal zirconia in addition to monoclinic zirconia, with the presence of zirconia also affecting the proportions of gamma-and alpha-alumina in favour of the former phase. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：2830 / 2839
页数：10
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