Anomalies in the short-range local environment and atomic diffusion in single crystalline equiatomic CrMnFeCoNi highentropy alloy  

作　　者：Alevtina Smekhova Daniel Gaertner Alexei Kuzmin Ana Guilherme Buzanich Goetz Schuck Ivo Zizak Gerhard Wilde Kirill V.Yusenko Sergiy Divinski 

机构地区：[1]Helmholtz-Zentrum Berlin für Materialien und Energie(HZB),D-12489 Berlin,Germany [2]Institute of Materials Physics,University of Münster,D-48149 Münster,Germany [3]Institute of Solid State Physics,University of Latvia,LV-1063 Riga,Latvia [4]Bundesanstalt für Materialforschung und–prüfung(BAM),D-12489 Berlin,Germany

出　　处：《Nano Research》2024年第6期5336-5348,共13页纳米研究（英文版）

基　　金：the Helmholtz-Zentrum Berlin for the provision of access to synchrotron radiation facility and allocation of synchrotron radiation at the BAMline and KMC-3(CryoEXAFS end-station)beamlines of BESSY II at HZB.;Yu.Chumlyakov(Tomsk State University,Russia)is acknowledged for the growth of single crystals.A.S.also acknowledges personal funding from CALIPSOplus project(Grant Agreement No.730872 from the EU Framework Programme for Research and Innovation HORIZON 2020);A.K.is thankful for the financial support from the Latvian Council of Science project No.lzp-2023/1-0476.S.D.acknowledges financial support by the German Research Foundation(DFG),project DI 1419/24-1.G.W.acknowledges financial support by DFG via SPP2006,project WI 1899/32-2.;Institute of Solid State Physics,University of Latvia as the Center of Excellence has received funding from the EU Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No.739508,project CAMART2.

摘　　要：Multi-edge extended X-ray absorption fine structure(EXAFS)spectroscopy combined with reverse Monte Carlo(RMC)simulations was used to probe the details of element-specific local coordinations and component-dependent structure relaxations in single crystalline equiatomic CrMnFeCoNi high-entropy alloy as a function of the annealing temperature.Two representative states,namely a high-temperature state,created by annealing at 1373 K,and a low-temperature state,produced by long-term annealing at 993 K,were compared in detail.Specific features identified in atomic configurations of particular principal components indicate variations in the local environment distortions connected to different degrees of compositional disorder at the chosen representative temperatures.The detected changes provide new atomistic insights and correlate with the existence of kinks previously observed in the Arrhenius dependencies of component diffusion rates in the CrMnFeCoNi high-entropy alloy.

关 键 词：high-entropy alloys DIFFUSION short-range order extended X-ray absorption fine structure(EXAFS) reverse Monte Carlo 

分 类 号：TG139[一般工业技术—材料科学与工程]