FATIGUE BEHAVIOUR OF AL-12 % Si/SiC, COMPOSITE PRODUCED BY SQUEEZE CASTING TECHNIQUE

The applied squeeze casting technique makes possible the local strengthening with ceramic fibers or ceramic particles of elements with Al-alloy matrices. In this paper the elaborated technology of manufacturing of porous ceramic preforms from Saffil fibers is shown and technology of squeeze casting elaborated at Wrocław University of Technology, Chair Foundry, Polymers and Automation described. There were applied the preforms characterized by porosities of 90% and 80%, what after squeeze casting with liquid EN AC - 44200 Al alloy produces the composite materials containing 10 vol. and 20 vol.% of fiber strengthening. The structural phenomena at the interface of strengthened alloy investigated with the optical and electron microscopy are discussed and the mechanical properties of manufactured composite materials are shown.

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Hot tensile and fatigue behaviour of zinc–aluminum alloys produced by gravity and squeeze casting

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2004.07.023 ◽

2005 ◽

Vol 26 (6) ◽

pp. 479-485 ◽

Cited By ~ 30

Author(s):

Fatih Çay ◽

S. Can Kurnaz

Keyword(s):

Aluminum Alloys ◽

Squeeze Casting ◽

Fatigue Behaviour

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Physical Properties of Copper Based MMC Strengthened with Alumina

Archives of Foundry Engineering ◽

10.2478/afe-2014-0042 ◽

2014 ◽

Vol 14 (2) ◽

pp. 85-90 ◽

Cited By ~ 6

Author(s):

J. W. Kaczmar ◽

K. Granat ◽

A. Kurzawa ◽

E. Grodzka

Keyword(s):

Physical Properties ◽

Squeeze Casting ◽

Liquid Copper ◽

Microstructural Analysis ◽

Copper Matrix ◽

Ceramic Particles ◽

Casting Technique ◽

Eds Analysis ◽

Alumina Particles ◽

Porous Compacts

Abstract The aim of this work is the development of Cu-Al2O3 composites of copper Cu-ETP matrix composite materials reinforced by 20 and 30 vol.% Al2O3 particles and study of some chosen physical properties. Squeeze casting technique of porous compacts with liquid copper was applied at the pressure of 110 MPa. Introduction of alumina particles into copper matrix affected on the significant increase of hardness and in the case of Cu-30 vol. % of alumina particles to 128 HBW. Electrical resistivity was strongly affected by the ceramic alumina particles and addition of 20 vol. % of particles caused diminishing of electrical conductivity to 20 S/m (34.5% IACS). Thermal conductivity tests were performed applying two methods and it was ascertained that this parameter strongly depends on the ceramic particles content, diminishing it to 100 Wm-1K-1 for the composite material containing 30 vol.% of ceramic particles comparing to 400 Wm-1K-1 for the unreinforced copper. Microstructural analysis was carried out using SEM microscopy and indicates that Al2O3 particles are homogeneously distributed in the copper matrix. EDS analysis shows remains of silicon on the surface of ceramic particles after binding agent used during preparation of ceramic preforms.

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