点击次数：

论文类型： 期刊论文

发表时间： 2009-06-10

发表刊物： JOURNAL OF ALLOYS AND COMPOUNDS

收录刊物： EI、SCIE

卷号： 478

期号： 1-2

页面范围： 237-239

ISSN号： 0925-8388

关键字： Nanostructured materials; Powder metallurgy; Mechanical alloying; Microstructure; High-pressure

摘要： 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.