Nanostructured coated powders for structural net shape components

被引：2

作者：

Castanho, J. M. ^{[1
]}

Vieira, M. T. ^{[1
]}

Matos, A. ^{[1
]}

Trindade, B. ^{[1
]}

机构：

[1] Univ Coimbra, Dept Mech Engn, ICEMS, Mat & Surface Engn Grp, Coimbra, Portugal

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 434卷 / 434-435期

关键词：

thin films; surfaces and interfaces; powder metallurgy; metals and alloys;

D O I：

10.1016/j.jallcom.2006.08.180

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 specific goal of the present study is to evaluate the surface performance of thin films based on sputtered stainless steel (304 AISI) deposited on dissimilar (Cu) and similar powder materials (316 AISI) with different size distributions and shapes. The covering efficiency, the surface morphology and the grain size, and their impact on the flowability of powders, are studied. The most important role of powder surface treatments is attained when spherical powders of copper were coated with a nanocrystalline thin film of stainless steel, the flowability increases by 80%. However, in the stainless steel powders the presence of a similar coating has relevance only for irregular particles, where a 25% flowability improvement is measured. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：383 / 385

页数：3

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