Strength of AC8A Aluminum Alloy Reinforced with Alumina Short Fiber Using Alumina Binder

摘要

Alumina short fiber preforms with Al_2O_3 binder were fabricated and infiltrated with AC8A aluminum alloy melt by squeeze casting. The effects of fiber volume fraction, temperature, and heat treatment on the tensile strength of the composites were investigated. Aging behavior was not changed by the reinforcement. The Al_2O_3 binder provided a satisfactory interfacial bond between the fiber and the matrix without interfacial reaction or fiber damage. The composites showed peak strength at the fiber volume fraction of 18 percent, and the strength of the T6 treated composite had a strong interfacial bond even at high temperatures.