A novel medium-entropy(TiVNb)_(2)AlC MAX phase:Fabrication,microstructure,and properties
作者机构：School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and EngineeringUniversity of Science and Technology of ChinaShenyang 110016China Science and Technology on Advanced Functional Composites LaboratoryAerospace Research Institute of Material and Processing TechnologyBeijing 100076China
出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)
年 卷 期：2023年第137卷第6期
页 面：91-99页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
主 题：Medium-entropy ceramics MAX phases Microstructure Thermal properties Mechanical properties
摘 要：Medium-or high-entropy materials have great potential for applications due to their diverse compo-sitions and unexpected physicochemical ***,a novel medium-entropy(TiVNb)_(2)AlC was synthesized via hot pressing at 1400℃from three individual M_(2)AlC(M=Ti,V,Nb)MAX *** microstructure of(TiVNb)_(2)AlC was characterized from the microscale to the atomic scale by scanning electron microscope microscopy(SEM),scanning transmission electron microscopy(STEM),and energy dispersive spectroscopy(EDS).The results showed that Ti,V,and Nb atoms were fully solid-soluble in the M-sites of the M_(2)AlC MAX *** with three individual MAX phases,the thermal conduc-tivity of(TiVNb)_(2)AlC was reduced greatly in the temperature range of 293-1473 K,and its mechanical properties(including Young’s modulus,Vickers hardness,and bending strength)were all increased due to the solid solution strengthening and electronic mechanism.
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