Oxidation behavior of NbMoTaWV refractory high entropy alloy at 1000-1400 °C

被引：4
|
作者：
Ding, Yi [1 ,2 ]
Cheng, Yanhai [2 ]
Zhang, Ping [3 ]
Wang, Xin [1 ]
Liang, Xiubing [1 ]
机构：
[1] PLA Acad Mil Sci, Def Innovat Inst, Beijing 100071, Peoples R China
[2] China Univ Min & Technol, Sch Mech Engn, Xuzhou 221116, Jiangsu, Peoples R China
[3] China Univ Min & Technol, Sch Mat & Phys, Xuzhou 221116, Jiangsu, Peoples R China
来源：
CAILIAO GONGCHENG-JOURNAL OF MATERIALS ENGINEERING | 2023年 / 51卷 / 05期
关键词：
refractoryhigh entropyalloy; hightemperature oxidation; oxidation behavior; oxidation kinetics; microstructure; elementdiffusion;
D O I：
10.11868/j.issn.1001-4381.2021.000301
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
high temperature oxidation behavior of NbMoTaWV refractory high entropy alloy (RHEA)preparedbyarcmeltingwasstudiedbystaticoxidationexperiment,XRDandFSEM.The resultsrevealthattheNbMoTaWV RHEAisnotprotectiveduetoseverecracksintheoxidelayerat 1000 degrees C and1200 degrees C.Themassgainfollowsalinearoxidationlaw.Moltenoxidesformedat1400 degrees C, whichreleasethegrowthstressoftheoxidelayerandfilltheholesleftbythevolatilizationofMoand V oxides.IntheoxidationprocessofNbMoTaWV,oxygendiffusesintothe matrixandfirstoxidizes with NbandTainthediffusionlayertogenerateneedle-rodlikeoxidationproducts,andthenoxidizes withotheralloyelements.Inthesubsequentoxidationprocess,theoxidesof W aredissolvedin Nb and Taoxides,whilethegranularmixedoxidesof Moand V volatilizeathightemperatures.
引用
收藏
页码：94 / 103
页数：10
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