为了制备晶粒细小、组织均匀的复合材料,提高材料的力学性能,用搅拌摩擦加工法制备碳纳米管增强铝基复合材料,并对不同碳纳米管含量的复合材料的微观结构、拉伸性能及断口形貌进行分析.结果表明:碳纳米管添加到铝基体中,搅拌摩擦中心区晶粒细小,碳纳米管与基体之间结合良好,未发现明显的缺陷;碳纳米管对基材有明显的强化作用,铝基复合材料抗拉强度随着碳纳米管含量的增加而提高;碳纳米管体积分数为7%时,抗拉强度达到201 MPa,是基材的2.2倍;复合材料在宏观上呈现脆性断裂特征,微观上呈现韧性断裂特征,其断裂机制以CNTs/Al界面脱粘、基体撕裂和增强体断裂为主.
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