Al2O3/ADC12 Composites Fabricated by Decomposition-Synthesis Method and their Mechanical Behaviors

Lan Jiang; Yu Juan Shi; Jian Ding; Chun Bing; Gao Feng Fu

doi:10.4028/www.scientific.net/AMR.391-392.364

Paper Titles

The Effects of Fiber Orientation on the Vibration Modal Behavior of Carbon Fiber Plain Woven Fabric/Epoxy Resin Composites
p.345

Modal and Harmonic Response Analysis of Composite Resin Concrete
p.349

The Research of the Harmful Substances about Aggregate in Concrete
p.354

Bending Properties of Five-Layer Biaxial Weft Knitted Fabric Reinforced Composite Materials
p.359

Al₂O₃/ADC12 Composites Fabricated by Decomposition-Synthesis Method and their Mechanical Behaviors
p.364

Synthesis of Li₄Ti₅O₁₂ Anode Material for Lithium-Ion Batteries
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Preparation of Two-Package Inorganic Insulation Coating
p.373

Preparation of LiFePO₄/C Composite Powders
p.377

Research Development on the Preparation of Gold-Coated Magnetic Nanoparticles
p.381

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 391-392Al2O3/ADC12 Composites Fabricated by...

Al₂O₃/ADC12 Composites Fabricated by Decomposition-Synthesis Method and their Mechanical Behaviors

Abstract:

Aluminium matrix composites reinforced by Al₂O₃ particles has been produced by adding NH₄AlO(OH)HCO₃ into molten ADC12 Al-Si alloy, where the γ-Al₂O₃ reinforcement particles are formed by decomposing reaction of NH₄AlO(OH)HCO₃ during stirring. The results show that the Al₂O₃ particles are distributed more uniformly in the matrix than that by direct adding of Al₂O₃ particles. Hardness and wear properties have also been examined and the results show that the hardness of the composites increases with increasing volume fraction of the reinforced particles. Wear rate of the composites decreases with increasing volume fraction of the reinforced particles and increases with the applied load. The mechanical properties of the composites prepared by adding of NH₄AlO(OH)HCO₃ are superior and more wearable than that prepared by direct adding of Al₂O₃ particles. Wearing mechanism of the surfaces of the unreinforced alloy and composites is dominantly abrasive.