Cu@rGo添加量对6061铝基复合材料组织与性能的影响
Effects of Cu@rGo Additions on Microstructure and Properties of 6061 Aluminum Matrix Composites
奚运涛 1常玉 1刘璐 2蒙敏然 3王雷1
作者信息
- 1. 西安石油大学 材料科学与工程学院西安市高性能油气田材料重点实验室, 陕西 西安 710065
- 2. 西安稀有金属材料研究院有限公司, 陕西 西安 710016
- 3. 中国石油长庆油田分公司企管法规部, 陕西 西安 710021
- 折叠
摘要
采用放电等离子烧结(SPS)方法制备了不同Cu@rGo添加量的石墨烯增强6061 铝基复合材料,探讨了不同Cu@rGo添加量对Cu@rGo/6061Al复合材料显微组织和力学性能的影响规律.利用维氏显微硬度计和电子万能实验机测试试样的显微硬度和拉伸性能,利用扫描电子显微镜(SEM)观察试样断口的微观形貌.结果表明,与 6061Al基体相比,添加Cu@rGo显著提高了Cu@rGo/6061Al复合材料的屈服强度和抗拉强度.但伸长率随着Cu@rGo添加量的增加呈先升高后下降趋势,拉伸断口形貌也表明随着Cu@rGo含量的增加,撕裂棱变少,韧窝组织由小而深逐渐向大且浅过渡,说明复合材料的塑性逐渐变差.综合分析表明,当 Cu@rGo 添加量为 0.05wt%和 0.1wt%时,Cu@rGo/6061Al复合材料的综合性能较好,抗拉强度和伸长率较6061Al基材的均显著提高.
Abstract
Graphene-reinforced 6061 aluminum matrix composites with different Cu@rGo additions were prepared by spark plasma sintering(SPS).The effects of different Cu@rGo additions on the microstructure and mechanical properties of Cu@rGo/6061Al composites were discussed.The microhardness and tensile properties of the specimens were tested using a Vickers microhardness tester and an electronic universal testing machine.The microscopic morphologies of the fractures of the samples were observed using a scanning electron microscope(SEM).The results show that the addition of Cu@rGo sig-nificantly improves the yield strength and tensile strength of Cu@rGo/6061Al composites compared to the 6061 Al matrix.However,the elongation first increases and then decreases with the increase of Cu@rGo additions.The tensile fracture morphologies also show that with the increase of Cu@rGo additions,the tearing edges decreases,and the dimple structure gradually transitions from small and deep to large and shallow.It shows that the plasticity of the composites gradually deterio-rates.The comprehensive analysis shows that when the Cu@rGo additions are 0.05wt%and 0.1wt%,the comprehensive properties of the Cu@rGo/6061Al composites are better,and the tensile strength and elongation are significantly improved compared with the 6061 aluminum alloy substrate.
关键词
还原氧化石墨烯/6061铝基复合材料/显微组织/力学性能Key words
rGo/6061 aluminum matrix composites/microstructure/mechanical properties引用本文复制引用
基金项目
国家自然科学基金(12102340)
中国石油科技创新基金研究项目(2018D-5007-0216)
西安石油大学青年科研创新团队建设项目(2019QNKYCXTD14)
出版年
2024
NETL
NSTL
万方数据