Abstract
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.
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© 2002 Carl Hanser Verlag, München
Artikel in diesem Heft
- Frontmatter
- Articles/Aufsätze
- Peierls barriers, kinks, and flow stress: Recent progress
- Positron annihilation spectroscopy – a non-destructive method for lifetime prediction in the field of dynamical material testing
- Diffusion bonding of gamma-based titanium aluminides
- A nanotheory of the intense slip localization causing metal fatigue
- Dislocation and surface structures of copper and very-low-carbon steel at low fatigue amplitudes
- Effect of hafnium on the castability of directionally solidified nickel-base superalloys
- Polysiloxane-derived ceramic foam for the reinforcement of Mg alloy
- Biomechanical behaviour of implant-reinforced subcapital humeral fractures
- Thermodynamic modeling of the Ni – In system
- Oxidation of metals investigated by in situ surface sensitive X-ray diffraction
- Embrittlement of Cu [001] symmetric tilt boundaries induced by Sb segregation
- The microstructure of a Mg-10 wt.% Al alloy
- Notifications/Mitteilungen
- Personal/Personelles
- Books/Bücher
- Books/DGM
- Conferences/Konferenzen
Artikel in diesem Heft
- Frontmatter
- Articles/Aufsätze
- Peierls barriers, kinks, and flow stress: Recent progress
- Positron annihilation spectroscopy – a non-destructive method for lifetime prediction in the field of dynamical material testing
- Diffusion bonding of gamma-based titanium aluminides
- A nanotheory of the intense slip localization causing metal fatigue
- Dislocation and surface structures of copper and very-low-carbon steel at low fatigue amplitudes
- Effect of hafnium on the castability of directionally solidified nickel-base superalloys
- Polysiloxane-derived ceramic foam for the reinforcement of Mg alloy
- Biomechanical behaviour of implant-reinforced subcapital humeral fractures
- Thermodynamic modeling of the Ni – In system
- Oxidation of metals investigated by in situ surface sensitive X-ray diffraction
- Embrittlement of Cu [001] symmetric tilt boundaries induced by Sb segregation
- The microstructure of a Mg-10 wt.% Al alloy
- Notifications/Mitteilungen
- Personal/Personelles
- Books/Bücher
- Books/DGM
- Conferences/Konferenzen