Effect of heat treatment on properties of cold sprayed nanocrystalline copper alumina coatings

被引：16

作者：

Phani, P. Sudharshan ^{[1
]}

Vishnukanthan, V. ^{[1
]}

Sundararajan, G. ^{[1
]}

机构：

[1] Int Adv Res Ctr Powder Met & New Mat ARCI, Hyderabad 500005, Andhra Pradesh, India

来源：

ACTA MATERIALIA | 2007年 / 55卷 / 14期

关键词：

coating; electrical resistivity; nanocrystalline materials; hardness; cold spray; CHEMICAL ROUTES; CU; MICROSTRUCTURE; NANOCOMPOSITES; STRENGTH; BEHAVIOR; ALLOYS;

D O I：

10.1016/j.acatmat.2007.04.044

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cold gas dynamic spraying appears to be the most appropriate thermal spraying technique for depositing nanocrystalline powders given its low deposition temperature. Nanocrystalline copper alumina coatings were deposited on copper substrates and the effect of heat treatment temperature on porosity, grain size, microhardness and conductivity of the coatings was studied and compared with that of cold sprayed copper. The role of alumina in inhibiting grain growth and in strengthening the copper matrix was investigated. An attempt has been made to assess the contribution of various mechanisms to the conductivity of nanocrystalline copper alumina coatings. (c) 2007 Acta Materialia. Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：4741 / 4751

页数：11

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