Nano-particles dispersion effect on Ni/Al2O3 composite coatings

Kuo  SL; Chen  YC; Ger  MDHwu  WH

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Nano-particles dispersion effect on Ni/Al2O3 composite coatings

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Nano-alumina particles (80 nm) are easily agglomerated into larger particles in a nickel sulfamate bath with an average diameter of about 1109 nm. This leads to low alumina content in the composite coating. In this study, the diameter of alumina agglomerates was reduced with the decrease in electrolyte concentration. Alumina agglomeration was reduced to 178 nm at a bath concentration of 0.20 M nickel ions under 5 W l(-1), with 40 min ultrasonic energy treatment. Effective alumina particle dispersion in the electrolyte solution creates more opportunities for loose and strong adsorption of alumina particles onto the electrode. The Ni/Al2O3 composite coating was prepared with electrolyte concentration variations under reasonable electrochemical conditions. The alumina particle volume content in this composite coating was increased from 8.37 vol. to a maximum value of 26.78 vol.. The homogeneity of the composite coating is promoted with effective dispersion. (C) 2004 Elsevier B.V. All rights reserved.

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《Materials Chemistry and Physics》 |2004年第1期|5-10|共6页
作者
Kuo SL; Chen YC; Ger MDHwu WH;
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作者单位

Natl Chinyi Inst Technol, Dept Chem Engn, Taichung, Taiwan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类工程材料学;
关键词
dilute Ni bath; alumina; composite coating; dispersion; INERT PARTICLES; ELECTRODEPOSITION; CODEPOSITION; DEPOSITION; KINETICS;

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Nano-particles dispersion effect on Ni/Al2O3 composite coatings

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