Infiltrated Cu8Al–Ti alumina composites |
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| Affiliation: | 1. Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;2. Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;1. Dept. of Mechanical Engineering, IET Bhaddal Ropar, Punjab, India;2. Dept. of Production Engineering, G.N.D.E.C. Ludhiana, Punjab,india;3. Dept. of Mechanical Engineering S.V.I.E.T Banur, Punjab, India;4. School of Mechanical Engineering LPU Phagwara, Punjab,India;5. Dept. of Mechanical Engineering, S.B.S.S.T.C. Ferozepur, Punjab,india;1. Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran;2. Aerospace Engineering Department, Sharif University of Technology, Tehran, Iran;3. Department of Mechanical, Aerospace & Civil Engineering, Brunel University, Uxbridge, Middlesex UB8 3PH, UK |
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| Abstract: | The effect of titanium additions on the interface and mechanical properties of infiltrated Cu8 wt%Al–Al2O3 composites containing 57 ± 2 vol% ceramic are investigated, exploring two different Al2O3 particle types and four different Ti concentrations (0, 0.2, 1, 2 wt%Ti). Addition of 0.2 wt%Ti leads to the development of a thin (5–10 nm) layer enriched in Ti at the interface between Cu alloy and Al2O3 particles; this Ti concentration produces the best mechanical properties. With higher Ti-contents Ti3(Cu, Al)3O appears; this decreases both the interface and composite strength. Composites reinforced with vapor-grown polygonal alumina particles show superior mechanical properties compared to those reinforced by angular comminuted alumina particles, as has been previously documented for aluminum-based matrices. Micromechanical analysis shows that damage accumulation is more extensive, as is matrix hardening by dislocation emission during composite cooldown, in the present Cu8 wt%Al matrix composites compared with similarly reinforced and processed Al-matrix composites. |
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| Keywords: | A Metal-matrix composites (MMCs) A Particle reinforcement B Fibre/matrix bond D Mechanical testing |
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