Structural and mechanical characteristics of ZA27-7 wt.% SiC composites produced by powder metallurgy techniques

Different Al-SiC metal matrix composites (MMCs) with a different matrix, reinforcement sizes, and volume fractions were fabricated using ball milling (BM) and powder metallurgy (PM) techniques. Al and Al-SiC composites with different volume fractions were milled for 120 h. Then, the Al and Al-SiC composites were pressed under 125 MPa and finally sintered at 450 °C. Moreover, microsize and combination between micro and nano sizes Al-SiC samples were prepared by the same way. The effect of the Al matrix, SiC reinforcement sizes and the SiC volume fraction on the microstructure evolution, physical and mechanical properties of the produced composites was investigated. The BM and powder metallurgy techniques followed by sintering produce fully dense Al-SiC composite samples with different matrix and reinforcement sizes. The SiC particle size was observed to have a higher effect on the thermal conductivity, electrical resistivity, and microhardness of the produced composites than that of the SiC volume fraction. The decreasing of the Al and SiC particle sizes and increasing of the SiC volume fraction deteriorate the physical properties. On the other hand, the microhardness was enhanced with the decreasing of the Al, SiC particle sizes and the increasing of the SiC volume fraction.

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Interfacial design of Cu/SiC composites prepared by powder metallurgy for heat sink applications

Composites Part A Applied Science and Manufacturing ◽

10.1016/j.compositesa.2007.08.012 ◽

2007 ◽

Vol 38 (12) ◽

pp. 2398-2403 ◽

Cited By ~ 80

Author(s):

Th. Schubert ◽

A. Brendel ◽

K. Schmid ◽

Th. Koeck ◽

Ł. Ciupiński ◽

...

Keyword(s):

Powder Metallurgy ◽

Heat Sink ◽

Sic Composites

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The Effect of Sintering Temperature on Microstructure and Properties of Al – SiC Composites / Wpływ Temperatury Spiekania Na Mikrostrukture I Własnosci Kompozytów Al – SiC

Archives of Metallurgy and Materials ◽

10.2478/v10172-012-0148-7 ◽

2013 ◽

Vol 58 (1) ◽

pp. 43-48 ◽

Cited By ~ 10

Author(s):

B. Leszczynska-Madej

Keyword(s):

Powder Metallurgy ◽

Chemical Composition ◽

Sintering Temperature ◽

Single Action ◽

Microstructure And Properties ◽

Sic Composites ◽

Cold Pressed ◽

Manufacturing Parameters ◽

Rigid Die

Attempts have been made to describe the influence of sintering temperature on the microstructure and properties of Al - SiC composites. Mixtures of 100%Al and Al - 5% SiC, Al - 10% SiC were produced by tumbling for 30 minutes in the Turbula T2F mixer. The powders were subsequently cold pressed at pressure 300MPa in a rigid die on a single action press. The green compacts were sintered in nitrogen at 580°C and 620°C for one hour. The main objective of this work was to determine influence of chemical composition and the manufacturing parameters on microstructure and properties of Al - SiC composites produced by powder metallurgy technology.

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