Microstructure and corrosion behavior of Al3Ti/ADC12 composite modified with Sr

作     者：bao-biao yu hong yan qing-jie wu zhi hu fan-hui chen Bao-biao Yu;Hong Yan;Qing-jie Wu;Zhi Hu;Fan-hui Chen

作者机构：School of Mechanical and Electrical EngineeringNanchang UniversityNanchang 330031China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2018年第25卷第7期

页      面：840-848页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by the National Natural Science Foundation of China(No.51364035) the Natural Science Foundation of Jiangxi Province(No.20171BAB206034) 

主　　题：Sr modification A13Ti/ADC 12 composite microstxucture corrosion behavior 

摘      要：In this study, we investigated the effect of the addition of Sr （0wt%, 0. lwt%, 0.2wt%, and 0.3wt%） on the microstaalcture and cor- rosion behavior of A13Ti/ADC12 composite by optical microscopy, X-ray diffraction, sca^lning electron microscopy, mid energy diffraction spectroscopy. The results reveal that the c^-A1 phases were nearly spherical mid 40 gin in size and that the eutectic Si phases became round in the composite when the Sr content reached 0.2wt%. The A13Ti paxticles were distributed uniformly at the grain boundary. The results of the corrosion examination reveal that the A13Ti/ADC12 composite exhibited a minimum corrosion rate of 0.081 g.m 2,hl for an Sr content of 0.2wt%, which is two thirds of that of umnodified composite （0.134 g.m4.h 1）. This improved corrosion resistaalce was due to galvamc cor- rosion, which resulted from the low area ratio of the cathode to anode regions. This caused a low-density corrosion current in the composite, thereby yielding optimum corrosion resistmlce.