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A novel method for incorporation of micron-sized SiC particles into molten pure aluminum utilizing a Co coating

Mohammadpour, M., Azari Khosroshahi, Rasoul, Taherzadeh Mousavian, Reza orcid logoORCID: 0000-0002-2274-3636 and Brabazon, Dermot orcid logoORCID: 0000-0003-3214-6381 (2015) A novel method for incorporation of micron-sized SiC particles into molten pure aluminum utilizing a Co coating. Metallurgical and Materials Transactions B, 46 (1). pp. 12-19. ISSN 1073-5615

Abstract
Ceramic particles typically do not have sufficiently high wettability by molten metal for effective bonding during metal matrix composite fabrication. In this study, a novel method has been used to overcome this drawback. Micron-sized SiC particles were coated by a cobalt metallic layer using an electroless deposition method. A layer of cobalt on the SiC particles was produced prior to incorporation in molten pure aluminum in order to improve the injected particle bonding with the matrix. For comparison, magnesium was added to the melt in separate experiments as a wetting agent to assess which method was more effective for particle incorporation. It was found that both of these methods were more effective as regard ceramic particulate incorporation compared with samples produced with as-received SiC particles injected into the pure aluminum matrix. SEM images indicated that cobalt coating of the particles was more effective than magnesium for incorporation of fine SiC particles (below 30 lm), while totally the incorporation percentage of the particles was higher for a sample in which Mg was added as a wetting agent. In addition, microhardness tests revealed that the cobalt coating leads to the fabrication of a harder composite due to increased amount of ceramic incorporation, ceramic-matrix bonding, and possibly also to formation of Al-Co intermetallic phases.
Metadata
Item Type:Article (Published)
Refereed:Yes
Uncontrolled Keywords:Structural Materials; Surfaces and Interfaces; Thin Films
Subjects:Engineering > Materials
Engineering > Mechanical engineering
DCU Faculties and Centres:Research Initiatives and Centres > Advanced Processing Technology Research Centre (APTRC)
Publisher:Springer
Official URL:http://dx.doi.org/10.1007/s11663-014-0186-9
Copyright Information:© 2015 Springer. The original publication is available at www.springerlink.com
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:21079
Deposited On:02 Feb 2016 14:16 by Fran Callaghan . Last Modified 24 Jun 2021 15:38
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