Preprint
Novel Aln Reinforcement to Enhance Bonding and Mechanical Properties of Al/Aln Metal Matrix Composites
Social Science Research Network (SSRN) , Vol.5 March 2024
Elsevier
2024
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 a 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 synthesised 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 framework for powder metallurgy production of advanced Al/AlN MMCs with superior physical and mechanical properties with outstanding flexibility to control reinforcement features.
Details
- Title
- Novel Aln Reinforcement to Enhance Bonding and Mechanical Properties of Al/Aln Metal Matrix Composites
- Authors
- Samuel Rogers (Corresponding Author) - The University of QueenslandMatthew S Dargusch - The University of QueenslandJoseph A. Otte - The University of QueenslandDamon Kent - University of the Sunshine Coast, Queensland, School of Science, Technology and Engineering
- Publication details
- Social Science Research Network (SSRN) , Vol.5 March 2024
- Publisher
- Elsevier
- Date published
- 2024
- DOI
- 10.2139/ssrn.4747792
- ISSN
- 1556-5068
- Organisation Unit
- School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 991087896902621
- Output Type
- Preprint
Metrics
31 File views/ downloads
31 Record Views