摘要
为了改善Al-Zn合金组织,有效调控合金的溶解速率,采用光学显微镜(OM)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)和电化学工作站等测试手段,研究了不同Sn含量对铸态Al-Zn合金微观组织和电化学性能的影响规律。结果表明:合金主要由Al基体相、Al0.71-Zn0.29相和Sn相组成,随着Sn含量的增加,析出相在晶界处的含量明显增加,尺寸逐渐增大,且由颗粒状逐渐转变为长条状;当Sn含量从0.1wt%增加到2wt%时,合金的平均晶粒尺寸从194.54μm减小到65.33μm,溶解速率和电化学活性不断提高;Sn含量继续增加,合金的平均晶粒尺寸逐渐增大,溶解速率和电化学活性下降。
In order to improve the microstructure of the Al-Zn alloy,the dissolution rate of the alloy canbe effectively controlled.The influence of different Sn content on microstructure and electrochemical properties of as-cast Al-Zn alloy was studied by means of optical microscope(OM),X-ray diffractometer(XRD),scanning electron microscope(SEM),energy dispersive spectrometer(EDS)and electrochemical workstation.The results show that the alloy is mainly composed of Al matrix phase,Al 0.71 Zn 0.29 phase and Sn phase,with the increase of Sn element content,the content of the precipitated phase at the grain boundary is increased obviously,the size is gradually increased,and the grain is gradually changed into a strip shape.When the Sn content increased from 0.1wt%to 2wt%,the average grain size of the alloy decreased from 194.54μm to 65.33μm,and the dissolution rate and the electrochemical activity of the alloy were continuously improved.As Sn content continued to increase,the average grain size of the alloy gradually increased,while dissolution rate and electrochemical activity decreased.
作者
周勇
赵飞
高倩
孙良
董会
翟文彦
ZHOU Yong;ZHAO Fei;GAO Qian;SUN Liang;DONG Hui;ZHAI Wenyan(School of Material Science and Engineering,Xi’an Shiyou University,Xi’an 710065)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2019年第S02期406-409,共4页
Materials Reports
基金
西安石油大学研究生创新与实践能力培养项目(YCS17211038)
西安石油大学“材料科学与工程”省级优势学科资助(YS37020203)~~
