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

CNTs/Al Interfacial Reaction Degree and the Relationship with Mechanical Performance of Composite

摘要: 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1 h延长到6 h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。

Abstract: 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.