Production of Mo2MB2-type (M = Ni, Fe, Co) ternary boride containing alloys by self-propagating high temperature synthesis

Moghaddam, Sevinch Rahimi; Kaya, Faruk; Derin, Bora

doi:10.1016/j.jestch.2019.07.004

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…Furthermore, the microhardness of the three kinds of the coatings was obviously higher than that of the 316L stainless-steel substrate (251.16 ± 21.30 HV0.3), and the microhardness of the MoB/NiCr coating was 2.6 times higher than that of the 316L stainless-steel substrate. The reasons for this phenomenon in this study are that the presence of binary or ternary boride phases, with their excellent mechanical properties, can increase the microhardness values in the coatings [16,28]. The borides (TiB2, CoMoB, CoMo2B2, NiMo2B2) were in situ synthesized in the coatings (as shown in Figures 10-13), which would improve the microhardness of the coatings in this study.…”

Section: Microstructure Of As-sprayed Coatingsmentioning

confidence: 90%

Microstructure, Mechanical Properties, Abrasive Wear, and Corrosion Behavior in Molten Zinc of Boride-Based Coatings in Situ Synthesized by an HVOF Spraying Process

Chen

Bai

et al. 2019

Coatings

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Hot-dip galvanizing has been used for anti-corrosion of various steel products; however, the corrosion of molten zinc in the galvanizing industry is the key problem to be solved. Three kinds of Mo–B–Co–Cr, Mo–B–Ni–Cr, and Ti–B–Co–Cr mixture powders were deposited on the surface of a 316L stainless-steel substrate by a HVOF spraying method to prepare MoB/CoCr, MoB/NiCr, and TiB/CoCr coatings. The microstructure, mechanical properties, abrasive wear, and corrosion behavior in molten zinc of the in situ synthesized boride-based coatings were investigated. The experimental results showed that MoB/NiCr coating with a denser microstructure had the lowest porosity (0.811%). The in situ synthesized boride-phase compositions of MoB/CoCr, MoB/NiCr, and TiB/CoCr coatings were CoMoB and CoMo2B2, NiMo2B2, and TiB2, respectively. The MoB/NiCr coating had the highest boride content among the coatings. The presence of binary (TiB2) or ternary boride phases (CoMoB, CoMo2B2, and NiMo2B2) with their excellent mechanical properties could obviously increase the microhardness values in the coatings. The in situ synthesized borides in the coatings also could improve the wear resistance properties; MoB/NiCr coating with shallower grooves and smaller craters/pits had the smoothest worn surface and the lowest weight loss (6.8 ± 0.84 mg) among the coatings. After immersion test in molten zinc for 360 h, no presence of zinc or intermetallic compounds in the three kinds of the coatings (MoB/CoCr, MoB/NiCr, and TiB/CoCr), and the element compositions of the three kinds of coatings after the immersion test were the same as the as-sprayed coatings. Compared to the other coatings, MoB/NiCr coatings had the higher durability in molten zinc.

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Section: Microstructure Of As-sprayed Coatingsmentioning

confidence: 90%

Microstructure, Mechanical Properties, Abrasive Wear, and Corrosion Behavior in Molten Zinc of Boride-Based Coatings in Situ Synthesized by an HVOF Spraying Process

Chen

Bai

et al. 2019

Coatings

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“…MoCoB‐based cermet is composed of a 3D network, which is linked by boron atoms with alternating transition metals and boron layers, endowing MoCoB with excellent mechanical properties and low density (8.9 g/cm 3 ) 6 . Moghaddam 7 used self‐propagating high‐temperature synthesis (SHS) method to fabricate the MoCoB‐based cermets and found Mo 2 CoB 2 acts as the reinforcement phase. Yang 8 searched ICSD database and studied 26 transition metal ternary borides (M I M II B and M I 2 M II B 2 ), which indicates MoCoB borides show superior mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

The mechanical properties and electronic structures of V, Cr, Mn, Fe, Ni atoms doped MoCoB by first‐principles calculation

Xin,

Zhang,

Yan

et al. 2023

Int J Applied Ceramic Tech

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MoCoB‐based cermets have been regarded as the potential substitution of WC cermets with high hardness, high melting point and high oxidation resistance. Ternary borides‐based cermets are widely used in extreme environment, such as high‐pressure environment. Therefore, it is significant to explore the mechanical properties and electronic structures of transition elements X (X = V, Mn, Fe, Ni) atoms doped MoCoB under high pressure, which are performed by first‐principles calculations to provide guidance for industry applications. The analysis of cohesive energy and formation enthalpy indicates high pressure leads to unstable states with lower lattice constants and crystal volumes. The deviation of cohesive energy and formation enthalpy indicate Mo4Co3FeB4 and Mo4Co3NiB4 have similar stability. The shear modulus, Young's modulus and bulk modulus increase under high pressure, which consists with the increasing of covalence. The variation of ductility and anisotropy indicate similar upward trend, which is verified by Poisson's ratio, B/G ratio and anisotropy index AU. The analysis of overlap population indicates high pressure leads to the increasing of covalence of B‐Co covalent bonds and the decreasing of the covalence of B‐Mo covalent bonds. The analysis of electronic structures indicates the high pressure leads to higher hybridization and lower density of states of metallic bonds. The analysis of charge density difference consists with the variation of mechanical properties, implying shorter bond length and higher bonds strength under high pressure.

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On the Production of W–Fe–B Ternary Compounds by Self-propagating High-Temperature Synthesis

Soylu

Kaya

Sezen

et al. 2022

Metall Mater Trans B

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Production of Mo2MB2-type (M = Ni, Fe, Co) ternary boride containing alloys by self-propagating high temperature synthesis

Cited by 5 publications

References 16 publications

Microstructure, Mechanical Properties, Abrasive Wear, and Corrosion Behavior in Molten Zinc of Boride-Based Coatings in Situ Synthesized by an HVOF Spraying Process

Microstructure, Mechanical Properties, Abrasive Wear, and Corrosion Behavior in Molten Zinc of Boride-Based Coatings in Situ Synthesized by an HVOF Spraying Process

The mechanical properties and electronic structures of V, Cr, Mn, Fe, Ni atoms doped MoCoB by first‐principles calculation

On the Production of W–Fe–B Ternary Compounds by Self-propagating High-Temperature Synthesis

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Production of Mo2MB2-type (M = Ni, Fe, Co) ternary boride containing alloys by self-propagating high temperature synthesis

Cited by 5 publications

References 16 publications

Microstructure, Mechanical Properties, Abrasive Wear, and Corrosion Behavior in Molten Zinc of Boride-Based Coatings in Situ Synthesized by an HVOF Spraying Process

Microstructure, Mechanical Properties, Abrasive Wear, and Corrosion Behavior in Molten Zinc of Boride-Based Coatings in Situ Synthesized by an HVOF Spraying Process

The mechanical properties and electronic structures of V, Cr, Mn, Fe, Ni atoms doped MoCoB by first‐principles calculation

On the Production of W–Fe–B Ternary Compounds by Self-propagating High-Temperature Synthesis

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Production of Mo2MB2-type (M = Ni, Fe, Co) ternary boride containing alloys by self-propagating high temperature synthesis