Properties of Al-Based Matrix and Diamond Composites Fabricated by Semi-Solid Metal Processing

Qiu Lian Dai

doi:10.4028/www.scientific.net/AMR.396-398.440

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 396-398Properties of Al-Based Matrix and Diamond...

Properties of Al-Based Matrix and Diamond Composites Fabricated by Semi-Solid Metal Processing

Abstract:

In this paper, semi-solid metal (SSM) processing was first applied to fabricate Al-based matrix and diamond composites. A kind of Al-Cu alloy with an adequate solidification range was chosen. Samples of Al-Cu alloys were fabricated by rheocasting with different processing parameters. Specimens of Al-based matrix and diamond composites were fabricated by rheocasting and hot press sintering technology respectively. Microstructures, transverse rupture strength (TRS), hardness and wear resistance were studied. Experimental results revealed that the TRS of the Al-based matrix and diamond composites fabricated by rheocasting increased by 157% and 115% respectively compared to the ones fabricated by hot press sintering technology. The fracture surfaces of the rheocasting specimens exhibited ductile cup and cone behavior as well as strong bonding between the matrix and diamond grits.

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Advanced Materials Research (Volumes 396-398)

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440-445

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.396-398.440

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Online since:

November 2011

Authors:

Qiu Lian Dai

Keywords:

Al-Based Matrix, Bonding Strength, Diamond Composites, Mechanical Property, Semi-Solid Metal Processing (SSM)

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