Effect of ZnAl₂O₄ coating of whisker surface on Young's modulus of Al₁₈B₄O₃₃w/Al composite

Abstract

Pure aluminium matrix composites reinforced by ZnAl 2 O 4 coated Al 18 B 4 O 33 whiskers were fabricated by squeeze casting. The effect of ZnAl 2 O 4 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 ZnAl 2 O 4 coating content. The influence mechanisms of ZnAl 2 O 4 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 ZnAl 2 O 4 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.

Power dissipation efficiency and temperature sensitivity coefficient of 2024Al/Al18B4O33w composite deformed at strain rate up to 10.0 s−1

“…Whisker reinforced aluminum matrix composites have extended accepted in applications [1][2][3][4][5]. However, the addition of reinforcements increases the resistance to plastic deformation and then brings the risk of damage during hot forging.…”