Effect of plasma activated sintering parameters on microstructure and mechanical properties of Al-7075/B sub(4)C composites

We report on a study on the influence of Plasma activated sintering (PAS) parameters on the microstructure and mechanical properties of aluminum matrix composites (AMCs). In this paper a commercial Al alloy (7075) reinforced with 7.5 wt.% B sub(4)C were synthesized using PAS. Specifically, we studie...

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Bibliographic Details
Published in:Journal of alloys and compounds 2014-12, Vol.615, p.276-282
Main Authors: Wu, Chuandong, Fang, Pan, Luo, Guoqiang, Chen, Fei, Shen, Qiang, Zhang, Lianmeng, Lavernia, Enrique J
Format: Article
Language:English
Subjects:
Alloys
Aluminum
Aluminum base alloys
Bend strength
Compressive strength
Diamond pyramid hardness
Mechanical properties
Microstructure
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Summary:We report on a study on the influence of Plasma activated sintering (PAS) parameters on the microstructure and mechanical properties of aluminum matrix composites (AMCs). In this paper a commercial Al alloy (7075) reinforced with 7.5 wt.% B sub(4)C were synthesized using PAS. Specifically, we studied the influence of temperature, in the range of 450 [degrees]C to 540 [degrees]C, and holding time on the densification behavior of Al-7075/B sub(4)C composites. Moreover, the influence of residual porosity on mechanical properties of Al-7075/B sub(4)C composites was established via measurements of Vickers hardness, bending and compressive strength. High mechanical properties including Vickers hardness 181.6 HV, bending strength 1100.3 MPa, high compression yield strength 878.0 MPa and fracture strength 469.3 MPa of the consolidated Al-7075/B sub(4)C composite sintered at 530 [degrees]C for 3 min were achieved and attributed to a fully dense microstructure and a strong interface between matrix and reinforcement.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2014.06.110