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采用日本产ＡＧ－１０ＴＡ型电子万能试验机对挤压铸造ＺＡ２２／Ａｌ２Ｏ３短纤维复合材料的高温抗拉强度进行了测定，并用Ｆｒｉｅｎｄ修正的混合律模型对该试验结果进行了理论分析，结果表明ＺＡ２２／Ａｌ２Ｏ３短纤维复合材料及其基体的强度均随温度升高而下降，但ＺＡ２２合金基体的强度下降幅度更大。任一纤维体积分数的复合材料，均存在一临界转变温度Ｔｃｒｉｔ；超过该温度，复合材料强度大于基体强度。纤维体积分数越大，所需临界转变温度越低。在本试验中，Ｖｆ为１５％和２０％的复合材料的Ｔｃｒｉｔ分别为１２３℃和８７℃。任一温度下，复合材料均存在一临界纤维体积分数，超过该纤维体积分数，复合材料强度高于基体强度。温度越高，临界纤维体积分数越低。对ＺＡ２２／Ａｌ２Ｏ３短纤维复合材料来说，Ｆｒｉｅｎｄ模型中的经验参数Ｃ＊的取值随温度升高而降低。
The high temperature tensile strength of squeeze cast ZA22 / Al2O3 short fiber composites was measured by the Japan-made AG-10TA electronic universal testing machine, and the theoretical analysis was carried out by using Friend’s modified mixed-law model. The results show that ZA22 / Al2O3 short fiber composites and their matrix strength decreases with increasing temperature, but the strength of ZA22 alloy matrix decreased more. The composite material of any fiber volume fraction, there is a critical transition temperature Tcrit; beyond this temperature, the composite strength is greater than the substrate strength. The greater the fiber volume fraction, the lower the critical transition temperature required. In this test, the Tcrit for the composite with Vf of 15% and 20% were 123 ° C and 87 ° C, respectively. At any temperature, there is a critical fiber volume fraction in the composite, which exceeds the fiber volume fraction and the composite strength is higher than the matrix strength. The higher the temperature, the lower the critical fiber volume fraction. For ZA22 / Al2O3 short fiber composites, the empirical C * value in the Friend model decreases with increasing temperature.