University of Oulu

Nyanor, P., El-Kady, O., Yehia, H.M. et al. Effect of Bimodal-Sized Hybrid TiC–CNT Reinforcement on the Mechanical Properties and Coefficient of Thermal Expansion of Aluminium Matrix Composites. Met. Mater. Int. 27, 753–766 (2021).

Effect of bimodal-sized hybrid TiC–CNT reinforcement on the mechanical properties and coefficient of thermal expansion of aluminium matrix composites

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Author: Nyanor, Peter1; El-Kady, Omayma2; Yehia, Hossam M.3;
Organizations: 1Department of Materials Science and Engineering, Egypt-Japan University of Science and Technology, Alexandria, 21934, Egypt
2Powder Technology Division, Central Metallurgical Research and Development Institute (CMRDI), Cairo, 11421, Egypt
3Mechanical Department, Faculty of Industrial Education, Helwan University, Cairo, 11795, Egypt
4Kerttu Saalasti Institute, University of Oulu, 85500, Nivala, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1.8 MB)
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Language: English
Published: Springer Nature, 2021
Publish Date: 2023-04-18


Aluminium (Al) matrix reinforced with carbon nanotubes (CNT), micron-sized titanium carbide (TiC) particles, and bimodal (nano + micron) hybrid TiC–CNT is fabricated by solution ball milling, followed by cold compaction and vacuum sintering to improve the mechanical properties and reduce thermal expansion. The hardness, wear resistance, compressive strength and CTE of pure Al, 0.6 wt% CNT/Al, 10 wt% TiC/Al, and hybrid 10–0.6 wt% TiC–CNT/Al composites have been investigated in this work. Analysis of strengthening mechanisms based on theoretical models, microstructure, and properties of constituent materials is performed. Microstructure analysis reveals an excellent distribution of the reinforcement phase and no new phase formation in sintered composites. The hardness value of bimodal TiC–CNT reinforced Al composite is significantly higher than monomodal TiC reinforced composite, reaching 2.3 times the hardness value of pure Al. Similarly, the wear resistance improved, and CTE reduced with CNT and TiC addition but is even significantly better in the hybrid reinforced composite. Experimental values of CTE show good agreement with the theoretical model. The strength and ductility of materials are mutually exclusive, but the compressive strength of pure Al has been doubled without significant loss in ductility through the use of bimodal-sized hybrid TiC–CNT reinforcement in this work.

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Series: Metals and materials international
ISSN: 1598-9623
ISSN-E: 2005-4149
ISSN-L: 1598-9623
Volume: 27
Issue: 4
Pages: 753 - 766
DOI: 10.1007/s12540-020-00802-w
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Copyright information: © The Korean Institute of Metals and Materials 2020. This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: