In situ synthesis of nanocrystalline Al6063 matrix nanocomposite powder via reactive mechanical alloying
SCIE
SCOPUS
- Title
- In situ synthesis of nanocrystalline Al6063 matrix nanocomposite powder via reactive mechanical alloying
- Authors
- Asgharzadeh, H; Simchi, A; Kim, HS
- Date Issued
- 2010-07-15
- Publisher
- ELSEVIER SCIENCE SA
- Abstract
- In this work, nanocrystalline Al6063 composite powder reinforced with nanometric oxide ceramic particles was synthesized via an in situ solid-gas reaction during high-energy mechanical alloying under a mixture of argon-oxygen atmosphere. The effect of oxygen volume fraction on the morphological evolution and microstructural changes during mechanical alloying was studied by various analytical techniques including optical and electron microscopy, X-ray diffraction, laser particle size analysis, apparent density measurement, and microhardness test. The reactive mechanical alloying resulted in the formation of amorphous Al- and Al-Mg-Si-Fe oxides with a size range of 40-100 nm and volume fraction up to similar to 2.6 vol.% dependent on the oxygen partial pressure. Electron microscopy studies revealed formation of equiaxed grains with a wide size distribution ranging from 60 to 260 nm. Meanwhile, finer particles with narrower size distribution were achieved at a shorter milling time when the in situ solid-gas reaction was employed. Results of compression test and hardness measurement on the hot extruded powders at 450 degrees C with an extrusion ratio of 14:1 revealed a significant improvement in the mechanical properties caused by the nanometric ceramic particles as well as the ultrafine grain structure of the matrix. (C) 2010 Elsevier B.V. All rights reserved.
- Keywords
- Nanostructured materials; Metal matrix composite; Mechanical alloying; Powder metallurgy; Microstructure; COMPOSITE POWDER; SICP COMPOSITES; AL; ALUMINUM; ATMOSPHERE; PARTICLES; MICROSTRUCTURE; MIXTURE; SYSTEM; CUO
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/25581
- DOI
- 10.1016/J.MSEA.2010.04.031
- ISSN
- 0921-5093
- Article Type
- Article
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol. 527, no. 18, page. 4897 - 4905, 2010-07-15
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