Thermal Expansion Behavior of Al Hybrid Composite Reinforced with Aluminum Borate Whisker and Magnetic Ceramic Particle

Gang Li; Zhen Jia Li; Wei Dong Fei

doi:10.4028/www.scientific.net/KEM.280-283.1697

Paper Titles

β-SiAlON Bonded Corundum Material and Its Application as Sliding Gate Plate for Continuous Casting
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Corrosion Behavior of BF Slag to SiAlON Bonded Corundum Refractories
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Slurry Erosive Wear Characteristics of Engineering Ceramics for Hydraulic Machinery
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Oxidation Properties of Three Dimensional (3-D) Carbon Fiber Preform Coated by SiC-SiO₂
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Thermal Expansion Behavior of Al Hybrid Composite Reinforced with Aluminum Borate Whisker and Magnetic Ceramic Particle
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Dry Friction and Wear Properties of Aluminum Matrix Composites Reinforced with 3D Network Ceramics
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Oxidation Process of FeNi42Cr6 Alloy Array Materials
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Phase Changes in Fe-Si Powder Mixtures by Mechanical Alloying and Subsequent Heat Treatment
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Formation of Fe-6.5wt%Si Sheets by Powder Rolling and Sintering
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Thermal Expansion Behavior of Al Hybrid Composite Reinforced with Aluminum Borate Whisker and Magnetic Ceramic Particle

Abstract:

Magnetic ceramic particles (NiFe2O4) and aluminum borate whiskers reinforced aluminum matrix composite was fabricated by squeeze casting technique, which had lower coefficients of thermal expansion (CTEs). The components and microstructure were characterized by X-ray diffraction (XRD), optical microscopy (OM) and scanning electron microscopy (SEM). The results showed that the CTE of the composite was lower than that of the composite only reinforced by aluminum borate whisker, and with increasing the number of thermal cycling, the CTE of the composite became low. The results indicated that the lower CTEs of composite resulted from ferromagnetic-paramagnetic transformation of the magnetic ceramic particles.