碳纳米管/铝界面反应程度及其与复合材料力学性能的关系

摘要

The evolution of interfacial reaction degree with different sintering time of mass fraction 2％CNTs/5083Al composite was studied by the electrochemical dissolution-gas chromatography method.The relationship of interfacial reaction degree and mechanical performance was discussed.The results show that with sintering time increasing from 1 h to 6 h,interfacial reaction degree of 2％CNTs/5083Al composite increased from 5.5％ to 24.1％ and showed a certain linear relationship with sintering time when the composite was sintered at 570 ℃.Young's modulus,yield strength and tensile strength of the composite increased at first and then decreased,while the elongation decreased slightly at first and then increased continuously with the increase of sintering time.%采用电化学溶解-气相色谱标定方法,研究了不同烧结时间下质量分数2％ CNTs/5083Al复合材料中界面反应程度的变化规律,并探讨了界面反应程度与复合材料力学性能的关系.结果表明:在570℃烧结温度下,当烧结时间从1h延长到6h时,2％CNTs/5083Al复合材料的界面反应程度从5.5％增加到24.1％,并与烧结时间成一定的线性关系;随着烧结时间的延长,复合材料的杨氏模量、屈服强度与抗拉强度均呈先增加后降低的趋势,而伸长率呈先略微下降后持续增加的趋势.