机械搅拌和烧结制备GNPs/Al复合材料力学性能  

Mechanical Properties of GNPs/Al Composites Prepared by Mechanical Stirring and Sintering

作　　者：于欢 周明哲[2] 夏金环 王荣荣[1] 马百常 周吉学 张素卿 吴建华 王西涛 Yu Huan;Zhou Mingzhe;Xia Jinhuan;Wang Rongrong;Ma Baichang;Zhou Jixue;Zhang Suqing;Wu Jianhua;Wang Xitao(Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials,Advanced Materials Institute,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,China;Central South University,Changsha 410083,China)

机构地区：[1]齐鲁工业大学(山东省科学院),山东省轻质高强金属材料重点实验室,山东省科学院新材料研究所,山东济南250014 [2]中南大学,湖南长沙410083

出　　处：《稀有金属材料与工程》2022年第8期3041-3048,共8页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(52004135,51804190);山东省自然科学基金(ZR2020QE147);山东省科学院青年基金(2020QN0020);山东省重点研发计划(2019JZZY020329,2019JZZY010364);济南市高校院所创新团队项目(2019GXRC030)。

摘　　要：采用机械搅拌和烧结工艺制备了GNPs/Al复合材料,实现了无损伤GNPs的完全铺展及在铝基体中均匀弥散分布。研究了GNPs对复合材料粉末冷压-烧结致密化行为的作用机制,阐明了GNPs对复合材料强度和塑性的作用机理,探讨了烧结时间对GNPs/Al复合材料力学性能的影响规律。结果表明,GNPs质量分数小于0.5%,烧结态GNPs/Al复合材料相对密度达到98%以上。烧结态Al-0.5%GNPs屈服强度达到204 MPa,相对于纯铝提高了18.6%。以Al-0.5%GNPs为例,烧结6 h后,复合材料硬度HV为602.7 MPa,烧结4 h后屈服强度为173 MPa,压缩应变40%时未发生明显破坏。GNPs/Al composites were prepared by mechanical stirring and sintering method. The complete spreading of non-destructive GNPs and uniform distribution of GNPs in aluminum matrix were realized. The effect mechanism of GNPs on the densification behavior of composite powder during cold pressing and sintering was studied. The effect mechanism of GNPs on the strength and plasticity of composite was clarified. The effect of sintering time on the mechanical properties of GNPs/Al composite was discussed. The results show that the relative density of sintered GNPs/Al composite is more than 98% when the content of GNPs is less than 0.5 wt%. The yield strength of as sintered Al-0.5 wt%GNPs reaches 204 MPa, which is 18.6% higher than that of pure aluminum. Taking Al-0.5 wt%GNPs as an example, after sintering for 6 h, the hardness HV of the composite is 602.7 MPa;after sintering for 4 h, the yield strength is 173 MPa. No obvious failure occurs at the compression strain being 40%.

关 键 词：粉末冶金 金属基复合材料 石墨烯 强化机制 

分 类 号：TB333[一般工业技术—材料科学与工程]