Fe−C micro-alloying effect on properties of Zr_(53)Al_(11.6)Ni_(11.7)Cu_(23.7)bulk metallic glass  

Fe−C微合金化对Zr_(53)Al_(11.6)Ni_(11.7)Cu_(23.7)块体金属玻璃性能的影响

作　　者：Da-wei DING JING TAN An-hui CAI Yong LIU Hong WU Qi AN Peng-wei LI Yan ZHANG Qing YANG 丁大伟;谭靖;蔡安辉;刘咏;吴宏;安琪;李鹏伟;张焱;阳清(中国科学院物理研究所,北京100190;松山湖材料实验室,东莞523808;湖南理工学院机械工程学院,岳阳414000;中南大学粉末冶金国家重点实验室,长沙410083)

机构地区：[1]Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]Songshan Lake Materials Laboratory,Dongguan 523808,China [3]College of Mechanical Engineering,Hunan Institute of Science and Technology,Yueyang 414000,China [4]State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China

出　　处：《Transactions of Nonferrous Metals Society of China》2021年第9期2750-2761,共12页中国有色金属学报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(No.51871234);the National Key Research and Development Program of China(No.2016YFB-0300500);the Open Fund of Key Laboratory of Materials Preparation and Protection for Harsh Environment(Nanjing University of Aeronautics and Astronautics),China,and Ministry of Industry and Information Technology,China(No.XCA19013-04).

摘　　要：(Zr_(53)Al_(11.6)Ni_(11.7)Cu_(23.7))_(1−x)(Fe_(77.1)C_(22.9))_(x)(x=0−2.2,at.%)bulk metallic glasses(BMGs)were prepared by copper mold suction casting method.Their glass forming ability and physical and chemical properties were systematically investigated.The glass forming ability is firstly improved with increasing x,and then decreased when x exceeds 0.44 at.%.Both glass transition temperature and crystallization temperature are increased,while the supercooled liquid region is narrowed,with Fe−C micro-alloying.The hardness,yielding and fracture strength,and plasticity firstly increase and then decrease when x reaches up to 1.32 at.%.The plasticity of the BMG(x=1.32 at.%)is six times that of the Fe-free and C-free BMG.In addition,by the Fe−C micro-alloying,the corrosion potential is slightly decreased,while the corrosion current density increases.The pitting corrosion becomes increasingly serious with the increase of Fe and C content.采用水冷铜模吸铸法制备(Zr_(53)Al_(11.6)Ni_(11.7)Cu_(23.7))1−x(Fe_(77.1)C_(22.9))_(x)(x=0~2.2,摩尔分数,%)块体金属玻璃,系统研究其玻璃形成能力和物理化学性能。结果表明,随着x的增大,玻璃形成能力得到提高,但当x大于0.44%时,玻璃形成能力降低;Fe−C的添加使玻璃转变温度和晶化温度同时升高,但使过冷液相区变窄。块体金属玻璃的硬度、屈服和断裂强度以及塑性首先随Fe−C含量的增加而增加,但当x增加到1.32%时,这些性能下降;含1.32%Fe−C的块体金属玻璃的塑性应变是不含Fe和C的块体金属玻璃的6倍。Fe−C微合金化后,块体金属玻璃的腐蚀电位轻微下降,然而腐蚀电流密度增加;随着Fe−C合金含量的增加,点蚀变得越来越严重。

关 键 词：Zr-based metallic glass corrosion property thermal property mechanical property Fe−C micro-alloying 

分 类 号：TG139.8[一般工业技术—材料科学与工程]