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Published VersionCC BY-NC-ND V4.0, Open Access
Journal article
Advancing sintering and matrix-reinforcement interaction in Al/AlN metal matrix composites through use of novel AlN reinforcement
Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing, Vol.908, pp.1-13
2024
Appears in UniSC Supported Open Access Outputs
Abstract
Demand for energy-efficient transportation has led to increased use of lightweight aluminium alloys due to their exceptional strength-to-weight. Meanwhile, aluminium-based metal matrix composites (MMCs) are being developed to enhance wear resistance and strength. However, traditional ceramic reinforcements often have poor bonding with the matrix, compromising performance. Here, we demonstrate the use of a novel ex-situ AlN reinforcement powder to enhance sintering and interfacial bonding for powder metallurgy preparation of Al/AlN MMCs. We compared two series of Al/AlN MMCs featuring 10 vol.% ex-situ AlN reinforcement, one prepared using commercial AlN powder, and the other using our novel AlN reinforcement prepared by low temperature direct nitridation of Al powder. Metallic Al contained in the synthesized reinforcement significantly improved interfacial adhesion between matrix and reinforcement and enhanced densification during sintering. This resulted in a substantial improvement in tensile mechanical properties, with an 11.5% increase in ultimate tensile strength and almost five-fold improvement in ductility compared to composites prepared using the conventional ceramic AlN reinforcement. This study provides a strategy for powder metallurgy production of advanced Al/AlN MMCs with superior physical and mechanical properties.
Details
- Title
- Advancing sintering and matrix-reinforcement interaction in Al/AlN metal matrix composites through use of novel AlN reinforcement
- Authors
- Samuel Rogers - University of the Sunshine Coast, Queensland, School of Science, Technology and EngineeringMatthew S. Dargusch - The University of QueenslandJoseph Otte - The University of QueenslandDamon Kent (Corresponding Author) - University of the Sunshine Coast, Queensland, School of Science, Technology and Engineering
- Publication details
- Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing, Vol.908, pp.1-13
- Publisher
- Elsevier BV
- Date published
- 2024
- DOI
- 10.1016/j.msea.2024.146931
- ISSN
- 1873-4936; 0921-5093
- Copyright note
- © 2024 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/).
- Data Availability
- Data will be made available on request.
- Grant note
- This work was financially supported by Australian Government Research Training Program Scholarship and The University of Queensland.
- Organisation Unit
- School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 991048896902621
- Output Type
- Journal article
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