Greil P, Höppel HW (2002)
Publication Type: Journal article
Publication year: 2002
Book Volume: 93
Pages Range: 812-818
Magnesium/ceramic composites with an interpenetrating microstructure were made by pressure infiltrating an open cellular ceramic preform. The low-density ceramic preform with a porosity of 82% was prepared by foaming a low-viscous polysiloxane/alumina suspension which formed an SiO2/Al2O3 microcomposite ceramic foam after thermal treatment in air at 1200°C. Foaming was achieved by an in situ blowing process during curing of the polysiloxane precursor at 200-300°C. The open cellular structure was characterized by a mean strut thickness of 130 μm, an average cell diameter of 800 μm and a high pore connectivity. The ceramic preforms were infiltrated with AZ 31 magnesium alloy by squeeze casting at 680°C applying a maximum pressure of 86 MPa. Interface bonding was achieved by the formation of spinel and cordierite in a reaction layer at the metal/ceramic interface. The dense metal/ceramic composite possesses significantly higher elastic modulus, yield strength and creep resistance than the monolithic alloy at room temperature and 135°C. The experimental results suggest that filler-loaded preceramic polymers have a high potential for optimization of lightweight metal cast components.
APA:
Greil, P., & Höppel, H.W. (2002). Polysiloxane-derived ceramic foam for the reinforcement of Mg alloy. Zeitschrift für Metallkunde, 93, 812-818.
MLA:
Greil, Peter, and Heinz Werner Höppel. "Polysiloxane-derived ceramic foam for the reinforcement of Mg alloy." Zeitschrift für Metallkunde 93 (2002): 812-818.
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