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作 者:谢昆 王裕 宋腾飞 刘洋 蔡彬 Xie Kun, Wang Yu, Song Tengfei, Liu Yang, Cai Bin(Key Laboratory of Material Physics of Ministry of Education, School of Physics and Engineering, Zhengzhou Universit)
机构地区:[1]郑州大学物理工程学院,材料物理教育部重点实验室
出 处:《特种铸造及有色合金》2018年第9期994-997,共4页Special Casting & Nonferrous Alloys
基 金:国家自然科学基金资助项目(51371160)
摘 要:用羧基化方法对CNTs(碳纳米管)进行预处理,增强其分散性。通过粉末冶金法制备了CNTs含量为0~2.0%的铝基复合材料,并对热挤压前后的力学性能进行了测试。结果表明,复合材料的力学性能均随CNTs含量的增加而增加,CNTs含量为1.0%的铝基复合材料的抗拉强度可达158 MPa,比同样条件下不含CNTs的纯铝抗拉强度(113 MPa)高40%。当CNTs含量在1.0%以下时,CNTs/Al复合材料的硬度、屈服强度和抗拉强度均与CNTs含量的平方根成正比,这表明其主要强化机制应是CNTs的弥散强化。Carboxylation was used to enhance the dispersion of CNTs.The 0-2.0% CNTs were added to Al matrix by powder metallurgy method.The mechanical properties of as-sintered and as-hot extruded CNTs/Al composites were tested at room temperature.The results show that the mechanical properties of CNTs/Al composites are increased with increasing in CNTs content.The tensile strength of CNTs/Al composites with 1.0% CNTs reaches 158 MPa,which is 40% higher than that of pure Al(113 MPa)prepared by the same conditions.For CNT content less than 1.0%,the hardness,yield strength and tensile strength of CNTs/Al are all proportional to the square roots of the CNTs contents,indicating that the main strengthening mechanism is characteried by the CNTs dispersion strengthening.
关 键 词:粉末冶金 CNTs/Al复合材料 羧基化 力学性能
分 类 号:TG146.21[一般工业技术—材料科学与工程] TB331[金属学及工艺—金属材料]
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