A comprehensive study for microstructure and properties of Mo2TiAlC2 MAX phase: Linking first-principle simulation and experimental approach

IF 4.2 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-03-04 DOI:10.1016/j.ijrmhm.2025.107134

Jiachen Zhang , Qingze Na , Pengfa Feng , Yufei Zuo , Fanshu Geng , Tiantian Ma , Rui Li , Guojun Zhang , Haijun Su

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Abstract

In this paper, the MAX Mo₂TiAlC₂ bulk, a new layered ternary carbide with excellent mechanical properties, was synthesized via hot-pressing sintering. The phase and microstructure of MAX Mo₂TiAlC₂ were revealed with respect to the effects of different soaking durations by means of X-ray diffraction patterns and scanning electron microscopy. Moreover, its unique layered structure was disclosed by means of high-resolution transmission electron microscopy. The compressive strength, flexural strength and fracture toughness of MAX Mo₂TiAlC₂ with different soaking durations were measured by means of compression tests and three-point bending tests. The spectacular mechanical properties in different directions caused by the lamellar structure and the unique atomic bonding were discussed by combining the first-principles calculations with the fracture morphology.

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来源期刊

$International Journal of Refractory Metals & Hard Materials$

International Journal of Refractory Metals & Hard Materials 工程技术-材料科学：综合

CiteScore

7.00

自引率

13.90%

发文量

236

审稿时长

35 days

期刊介绍： The International Journal of Refractory Metals and Hard Materials (IJRMHM) publishes original research articles concerned with all aspects of refractory metals and hard materials. Refractory metals are defined as metals with melting points higher than 1800 °C. These are tungsten, molybdenum, chromium, tantalum, niobium, hafnium, and rhenium, as well as many compounds and alloys based thereupon. Hard materials that are included in the scope of this journal are defined as materials with hardness values higher than 1000 kg/mm2, primarily intended for applications as manufacturing tools or wear resistant components in mechanical systems. Thus they encompass carbides, nitrides and borides of metals, and related compounds. A special focus of this journal is put on the family of hardmetals, which is also known as cemented tungsten carbide, and cermets which are based on titanium carbide and carbonitrides with or without a metal binder. Ceramics and superhard materials including diamond and cubic boron nitride may also be accepted provided the subject material is presented as hard materials as defined above.