Microstructure and mechanical properties of Fe/NbC composite layer prepared by in-situ reaction

作     者：Le Chen Ji-lin Li Meng-jun Wang Jie Zheng Yao Zhu Zhuo-lin Liu Bing-gui Lü Le Chen;Ji-lin Li;Meng-jun Wang;Jie Zheng;Yao Zhu;Zhuo-lin Liu;Bing-gui Lü

作者机构：School of Materials Science and EngineeringCentral South UniversityChangsha 410083China School of Materials Science and EngineeringXi'an University of TechnologyXi'an 710048China Institute of New MaterialsGuangdong Academy of SciencesGuangzhou 510650China Guangdong Provincial Key Laboratory of Metal Toughening Technology and ApplicationGuangzhou 510650China Guangdong Guangyun New Material Co.Ltd.Yunfu 527527GuangdongChina Yunfu Guangyun Technology R&D Co.Ltd.Yunfu 527527GuangdongChina 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2023年第20卷第4期

页      面：356-364页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 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(Nos.U20A20235,52171127) Guangdong East Northwest New R&D Institution Construction(No.2019B090905009) Guangdong Aluminum Strip and Foil Processing Enterprise Research Institute(No.2014B090903012) Development and Electrochemical Performance of Magnesium Alloy Anode Material for Battery(No.2020GDASYL-20200103137) Qingyuan Science and Technology Plan Project(No.2021SJXM030)。 

主　　题：in-situ reaction NbC reinforcement layer microstructure mechanical property 

摘      要：NbC ceramic surface-reinforced steel matrix composites were prepared by an in-situ reaction method at different temperatures(1,050℃,1,100℃and 1,150℃)for different times(1 h,2 h and 3 h).The phase constitution,microstructure and fracture morphology of NbC ceramic surface-reinforced steel matrix composites were analyzed by XRD,SEM and EDS,and the effects of the in-situ reaction temperature and time on the mechanical properties were systematically studied.The results indicate that the NbC reinforcement layer is formed through the reaction between Nb atoms and carbon atoms diffused from the steel matrix to the Nb plate.The thickness of this reinforcement layer increases as the reaction time prolongs.Additionally,an increase in reaction temperature results in a thicker reinforcement layer,although the rate of increase gradually decreases.The relationship among the thickness of the Nb C reinforcement layer,the reaction time and temperature was established by data fitting.The optimal tensile performance is achieved at 1,100℃for 1 h,with a tensile strength of 228 MPa.It is also found that the defects between the reinforcement layer and the steel matrix are related to reaction temperature.At 1,100℃,these defects are minimal.Fracture mostly occurs in the NbC reinforced layer of the composites,and the fracture mode is characterized by typical intergranular brittle fracture.