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Precessing of 2024 Al/W Composites Prepared by Powder Metallurgy

Published online by Cambridge University Press:  26 February 2011

Zhimin Yang ,
Jian Yang ,
Youyun Lian  and
Changhui Mao
Zhimin Yang
Affiliation:
Advanced electronic Materials Institute, General Research Institute for Non-ferrous Metals, 2# XinJieKou Wai Street, Beijing, 100088, China, People's Republic of
Jian Yang
Affiliation:
Advanced electronic Materials Institute, General Research Institute for Non-ferrous Metals, 2# XinJieKou Wai Street, Beijing, 100088, China, People's Republic of
Youyun Lian
Affiliation:
General Research Institute for Non-ferrous Metals, Beijing, 100088, China, People's Republic of
Changhui Mao
Affiliation:
General Research Institute for Non-ferrous Metals, Beijing, 100088, China, People's Republic of
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Abstract

Format

This is a copy of the slides presented at the meeting but not formally written up for the volume.

Abstract

In this work, the 2024 Al/W composites were fabricated by powder metallurgy. W powders and gas-atomized 2024 Al aluminum powder were milled by ball milling with different milling parameters. The mixtures were consolidated by vacuum hot press under a pressure of 400MPa and then hot-extruded for a higher density. A T6 heat treatment was carried out for the samples, which consisted of solution treating at temperature 470-500¡æ, water quenching and artificial aging at 190¡æ for 8h. The microstructure of as-milled mixture powders and the composites were investigated by combination of X-ray diffraction (XRD) and Field Emission Scanning Electron Microscopy (FESEM). The microstructure and its relationship with the mechanical properties of the composites were also investigated. The results show the milling-energy is a key factor for the processing of the composite. For the samples with high energy milling, Al atoms dissolved into W lattice gradually and finally formed a W solution after 6 hours’ milling, which can cause the a large amount of precipitation of WAl12, WAl5 in the following hot pressing process. With appropriate processing parameters, the tensile strength of the composite can reach 480 MPa.

Keywords

compositehot pressingpowder metallurgy
Type
Slide Presentations
Information
MRS Online Proceedings Library (OPL) , Volume 977: Symposium FF – Solution Processing of Inorganic and Hybrid Materials for Electronics and Photonics , 2006 , 977-FF04-05
Copyright
Copyright © Materials Research Society 2006

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