Journal
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
Volume 208, Issue 1-3, Pages 264-269Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2007.12.117
Keywords
Electric field; Iron powders; Sintering; Technologic parameter
Funding
- National Nature Science Foundation of China [50404014]
- China Postdoctoral Science Foundation [20060390177]
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In the process of intensified sintering of iron powders under the action of an electric field with low voltage and high current, the effect of sintering temperature and sintering time on the densification process were investigated by means of thermal simulation. Both the metalloscope results and the statistic analysis of the distribution of pores in sintered compacts show that an electric field is not only providing the joule heat for a compact, but also accelerating the diffusion among iron atoms in the sintering process, which leads to intensified sintering. The relative density of the sintered compact can be over 95% at relatively low sintering temperature (800 degrees C) or within relatively short sintering time (2 min) at high temperature. Both sintering temperature and sintering time have effect on the process of iron powder densification. In this study, a sintering temperature of 1100 degrees C and a sintering time of 4 min lead to over 97% consolidation for iron powder compact. (C) 2008 Elsevier B.V. All rights reserved.
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