通过实验对不同热处理制度时挤压态7090/SiCp复合材料的断裂韧性以及微观组织进行了研究.挤压态7090/SiCp复合材料经固溶和时效的热处理后,断裂韧性均有不同程度的提高.随着时效处理的进行,挤压态7090/SiCp复合材料的断裂韧性先升高后降低再升高,而470℃/1 h+490℃/lh双级固溶+120℃/28 h峰时效状态的复合材料强度最高,但KIc值较小.研究了7090/SiCp复合材料的断裂模式,结果可以看出复合材料的断裂是以穿晶断裂为主兼有沿晶断裂的混合型断裂.
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