Sintering Mechanism, Microstructure Evolution, and Mechanical Properties of Ti-Added Mo2FeB2-Based Cermets

Shen, Yi; Huang, Zhifu; Zhang, Lei; Li, Kemin; Cao, Zhen; Xiao, Peng; Jian, Yongxin

doi:10.3390/ma13081889

Cited by 10 publications

(3 citation statements)

References 46 publications

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“…Fe(MoB) 2 maintained tetragonal symmetry with a P 4/ mbm space group. The lattice parameters of Fe(MoB) 2 are a = b = 5.809(5) Å and c = 3.143(8) Å, and the unit cell volume is V = 106.06 Å 3 , which is close to that of previous experimental works. , Compared with the ground-state structure in previous reports, the average deviation of the lattice parameters in our results is approximately 1.1% . The crystal structure information is compiled in Table S1, and the polyhedral crystal models of Fe(MoB) 2 are presented in Figure b,c.…”

Section: Resultssupporting

confidence: 85%

Synthesis, Characterization, and First-Principles Analysis of the MAB-Like Ternary Transition-Metal Boride Fe(MoB)₂

et al. 2022

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Novel transition-metal borides have attracted considerable attention because they exhibit high stability under extreme conditions. Compared with binary borides, ternary transition-metal borides (TTMBs) exhibit novel boron substructures and diverse properties, which result in excellent designability. In this study, we synthesized the MAB-like (where M = iron, A = molybdenum, and B = boron) phase Fe(MoB) 2 using a high-pressure and high-temperature method. Fe(MoB) 2 exhibited ferromagnetic metastable characteristics with a saturation magnetization of 8.35 emu/g at room temperature. Microhardness measurement revealed an indentation hardness of 10.72 GPa, which was higher than those of conventional magnetic materials. First-principles calculations revealed excellent mechanical properties, which mainly originated from the strong covalent short B 2 chains. Furthermore, magnetism was attributed to the Fe 3d electrons. Numerous d−d hybridizations existed between the Fe 3d e g and Mo 4d orbitals, and the antibonding/nonbonding state difference for up/down-spin electrons in the hybridization orbitals led to the local magnetic moment of Fe(MoB) 2 . The magnetic anisotropy energy analyses reveal that Fe(MoB) 2 prefers the easy magnetization axis along the z direction, and Mo atom acts as a medium to realize the exchange action between two Fe atoms. The B−B and Fe−B bonds were considerably stronger than the Fe−Mo and Mo−B bonds, and Fe(MoB) 2 exhibited a class of atomically laminate composed of FeB 2 and Mo layers. These results may provide guidance for the design of novel multifunctional TTMBs by adjusting the interactions between binary metal components.

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Section: Resultssupporting

confidence: 85%

Synthesis, Characterization, and First-Principles Analysis of the MAB-Like Ternary Transition-Metal Boride Fe(MoB)₂

et al. 2022

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“…As shown, Mo powder has a hammer ball morphology, and the morphology of Fe powder is spherical, while the FeB powder has an irregular morphology. Table 1 shows the characteristics of raw powders [ 23 ]. As shown, the Mo/B atomic ratio of 0.9 is fixed and Mo content is changed.…”

Section: Methodsmentioning

confidence: 99%

“…At present, many research groups have conducted research on Mo 2 FeB 2 based cermets, investigating the microstructure evolution and mechanical properties of cermets with doped elements, such as Cr, V, Mn, Ti and C [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ]. There are also some research studies on the preparation of cermets [ 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Mo Content on In-Situ Anisometric Grains Growth and Mechanical Properties of Mo2FeB2-Based Cermets

Shen¹,

Xie²,

Sun³

et al. 2022

Materials

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Mo2FeB2-based cermets have wide applications in fields of wear resistance, corrosion resistance and heat resistance due to their simple preparation process, low-cost raw materials, and prominent mechanical properties. Herein, Mo2FeB2-based cermets with xMo (x = 43.5, 45.5, 47.5, 49.5, wt.%) were prepared by means of the vacuum liquid phase sintering technique. Investigations on the microstructure and mechanical properties of Mo2FeB2-based cermets with Mo addition were performed. Experimental results show that, with Mo content increasing, the average particle size decreases gradually, revealing that the grain coarsening of Mo2FeB2-based cermets is controlled by interface reaction. In addition, Mo2FeB2 grains gradually transform from an elongated shape to a nearly equiaxed shape. The improvement of Mo2FeB2 hard phase on the morphology is mainly due to the inhibition of solution–precipitation reaction by increasing Mo. Furthermore, the relative density of cermets decreases due to the reduced Fe content. When Mo content is 47.5 wt.%, a relatively small grain size of Mo2FeB2 is obtained (about 2.03 μm). Moreover, with the increase in Mo content, hardness and transverse rupture strength (TRS) of Mo2FeB2-based cermets increase firstly and then decrease. Whereas, with increasing Mo content, the fracture toughness deteriorates gradually. When Mo content is 47.5 wt.%, the comprehensive mechanical properties of cermets are the best. The optimal raw material ratio for the preparation of Mo2FeB2-based cermets in this study is determined to be 47.5 wt.% Mo–6.0 wt.% B-Fe.

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Effect of Boron and Carbon on the Surface-Alloyed Layers with Fe(15−x)MoTiBxMn2C (x = 0,1,2,3)-Based Covered Electrodes

Recep,

Engin,

Bülent

et al. 2023

J. of Materi Eng and Perform

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Sintering Mechanism, Microstructure Evolution, and Mechanical Properties of Ti-Added Mo2FeB2-Based Cermets

Cited by 10 publications

References 46 publications

Synthesis, Characterization, and First-Principles Analysis of the MAB-Like Ternary Transition-Metal Boride Fe(MoB)₂

Synthesis, Characterization, and First-Principles Analysis of the MAB-Like Ternary Transition-Metal Boride Fe(MoB)₂

Effect of Mo Content on In-Situ Anisometric Grains Growth and Mechanical Properties of Mo2FeB2-Based Cermets

Effect of Boron and Carbon on the Surface-Alloyed Layers with Fe(15−x)MoTiBxMn2C (x = 0,1,2,3)-Based Covered Electrodes

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Sintering Mechanism, Microstructure Evolution, and Mechanical Properties of Ti-Added Mo2FeB2-Based Cermets

Cited by 10 publications

References 46 publications

Synthesis, Characterization, and First-Principles Analysis of the MAB-Like Ternary Transition-Metal Boride Fe(MoB)2

Synthesis, Characterization, and First-Principles Analysis of the MAB-Like Ternary Transition-Metal Boride Fe(MoB)2

Effect of Mo Content on In-Situ Anisometric Grains Growth and Mechanical Properties of Mo2FeB2-Based Cermets

Effect of Boron and Carbon on the Surface-Alloyed Layers with Fe(15−x)MoTiBxMn2C (x = 0,1,2,3)-Based Covered Electrodes

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Synthesis, Characterization, and First-Principles Analysis of the MAB-Like Ternary Transition-Metal Boride Fe(MoB)₂

Synthesis, Characterization, and First-Principles Analysis of the MAB-Like Ternary Transition-Metal Boride Fe(MoB)₂