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Indexed by:期刊论文

Date of Publication:2009-06-10

Journal:JOURNAL OF ALLOYS AND COMPOUNDS

Included Journals:EI、SCIE

Volume:478

Issue:1-2

Page Number:237-239

ISSN No.:0925-8388

Key Words:Nanostructured materials; Powder metallurgy; Mechanical alloying; Microstructure; High-pressure

Abstract:In this paper, a new preparation technology is proposed to manufacture nano-alumina particle-reinforced copper alloy. The new preparation technology includes three processes: mechanical alloy, hydrogen sintering and explosive compaction. The microstructure indicates alpha Al(2)O(3) particles are dispersed in copper matrix and still keep the nanometer scale. We apply three kinds of explosion pressure, which is 2 GPa, 4 GPa and 6 GPa respectively, to research the influence of explosion pressure on compaction quality. The detection results show that the relative density and hardness of samples increase with the rise of explosion pressure, but diameter of Mach hole increase thereupon too. The most suitable explosion pressure for Cu/alpha Al(2)O(3) mixed powder is 4 GPa under the pressure the sample's relative density reaches 98.61% and hardness reaches 112 HV. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.