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Effect of Nd content on microstructure and mechanical properties of Grf/Al composite |
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| Authors: | Xu Wang Guoqin ChenWenshu Yang Murid HussainChenchong Wang Gaohui WuDaming Jiang |
| Affiliation: | a School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, PR China b School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China c Department of Materials Science and Chemical Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy |
| Abstract: | M40 graphite fibre reinforced Al-17Mg matrix composites with different neodymium (Nd) content (Al-17Mg, Al-17Mg-0.2Nd, Al-17Mg-0.5Nd and Al-17Mg-2Nd) were fabricated by pressure infiltration method. Microstructure of Grf/Al composites was investigated by XRD, SEM, TEM and HRTEM. Effect of Nd on microstructure and mechanical properties of Grf/Al composites were deeply discussed. Al3Mg2 and Al11Nd3 phases followed by segregation of Nd and Mg at carbon-aluminum interface were detected in composites containing Nd. The size and amount of Al4C3 phase were increased with Nd content. Bending strength of Grf/Al composites were decreased sharply from 1463 MPa (Grf/Al-17Mg) to 791 MPa (Grf/Al-17Mg-2Nd) after the addition of Nd. The increased Nd content decreased the pull-out of single fibre and bundles, which was due to the high interfacial bonding strength with formation of Al4C3, Al3Mg2, Al11Nd3 phases and the transition layer. |
| Keywords: | Composite Electron microscopy Interface Failure |
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