Developing Core-Shell Nano-Structures in FeCrAl-ODS Ferritic Alloys with the Co-Addition of Ni and Zr

作     者：Wenquan Ding Jieli Ma Yong Jiang Yiren Wang Huiqun Liu Wenquan Ding;Jieli Ma;Yong Jiang;Yiren Wang;Huiqun Liu

作者机构：Key Laboratory for Nonferrous Materials of Ministry of EducationSchool of Materials Science and EngineeringCentral South UniversityChangsha410083China National Key Laboratory for Powder MetallurgyCentral South UniversityChangsha410083China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2024年第37卷第2期

页      面：364-372页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：This work was financially supported by the National MCF Energy R&D Program of China(No.2018YFE0306100).The computational resources at Hefei Advanced Computing Center and the High Performance Computing Center of Central South University are also highly appreciated 

主　　题：FeCrAl Oxide-dispersion-strengthened(ODS)alloy Mechanical alloying Nano-oxides Core-shell 

摘      要：A new Ni+Zr co-alloyed FeCrAl-ODS(oxide-dispersion-strengthened)ferritic alloy was fabricated by ball-milling and *** electron microscopy and atom probe tomography,the dispersive formation of high density core-shelled nano-particles of various sizes was confirmed with a common B2-NiAl *** which,median-sized nano-particles(20-50 nm)typically have an Y_(4)Al_(2)O_(9)nano-core of~20 nm,ultra-fine nano-particles(~20)nm have an Y_(4)Zr_(3)O_(12)nano-core of~10 nm,and larger-sized nano-particles(50-100 nm)incorporate an ultra-fine Y_(4)Al_(2)O_(9)nano-core and a few ultra-fine Y_(4)Zr_(3)O_(12)*** these nano-phases were highly coherent with the ferritic *** large Y--Al-O nano-oxides were *** total number density of ultra-fine nano-particles was estimated as~2×10^(23)m^(-3)with a mean size of 6.3 nm only,and accordingly,the new alloy achieved an excellent combination of strength and ductility at high temperatures.