Effect of ZnAl 2 O 4 coating of whisker surface on Young's modulus of Al 18 B 4 O 33 w/Al composite

Abstract

Pure aluminium matrix composites reinforced by ZnAl₂O₄ coated Al₁₈B₄O₃₃ whiskers were fabricated by squeeze casting. The effect of ZnAl₂O₄ coating on the Young's modulus of the composite was investigated. The results show that the Young's modulus of the composite significantly increases with increasing ZnAl₂O₄ coating content. The influence mechanisms of ZnAl₂O₄ coating on the Young's modulus of the composite were analysed. The increase in load transfer area of whisker/matrix interface and the volume fraction of effective reinforcement with increasing ZnAl₂O₄ coating content can increase the Young's modulus of the composites. The steps can provide an additional load transfer from the matrix to whiskers during the tensile deformation of the composites.

Keywords

Al18B4O33 whiskers Composites Young's modulus ZnAl2O4 Coating

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