Electrochemical boriding of molybdenum in molten borax

Kahvecioğlu, Özgenur; Sista, V.; Eryilmaz, O. L.; Erdemir, Ali

doi:10.1179/1743294414y.0000000446

Cited by 9 publications

(3 citation statements)

References 36 publications

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“…[1][2][3][4][5][6] The process method, duration, temperature and type of boron source are the main effective parameters in boronising treatment. [7][8][9][10][11][12][13][14][15] In addition to these parameters, certainly the most important factor is the chemical composition and impurity level of the substrate material (e.g. steel).…”

Section: Introductionmentioning

confidence: 99%

Characterisation of boride layer formed on Fe–Mo binary alloys

Azakli

Cengiz

Tarakçı

2016

Surface Engineering

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The influence of molybdenum on the boronising behaviour of iron (with addition of 1, 2, 4, 8 and 16 wt-% Mo) was investigated by performing pack boronising at 1100°C for 3 h. The borided samples were characterised using SEM-EDS, EPMA, XRD, microhardness tester and profilometer. FeB and Fe 2 B polyphase exists in all boronised pure Fe and Fe-Mo alloys. Mo 2 FeB 2 precipitates were detected in the boride layer and transition zone. The increasing content of Mo in Fe-Mo alloys resulted in a decrease in the boride layer thickness. The average microhardness value of boride layers formed on pure Fe and Fe-16Mo alloys were measured as 1750 and 2050 HV, respectively, while approximate microhardness value of Mo 2 FeB 2 precipitates was measured as 2600 HV. It was also observed that the increasing Mo content in Fe-Mo alloys resulted in an increment in the surface roughness from approximately 0.8 to 2.7 μm.

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Section: Introductionmentioning

confidence: 99%

Characterisation of boride layer formed on Fe–Mo binary alloys

Azakli

Cengiz

Tarakçı

2016

Surface Engineering

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“…Akca et al [19] studied the forming of boride on Mo by HAPC using the pack of composition 90SiC-5KBF4-5B4C (wt %), where the temperature (1000 °C, 1100 °C) and time (2-8 h) were investigated. In addition, electrochemical boriding of molybdenum was also studied [20]. The formed boride layers consisted of two distinct Mo2B4.027 and Mo2B5 phases.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of MoB Coating on Mo Substrate

Wang

Shi

Yan

et al. 2018

Metals

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Abstract:A molybdenum boride (MoB) coating was prepared on molybdenum (Mo) by an in-situ chemical vapor deposition method. To develop a fuller understanding of the effect of depositional conditions on the growth of MoB coating formed on Mo substrate, this paper studied the phase composition and microstructure of the coating at varied conditions. At the same time, the relationships between the growth of the coating in thickness and depositional conditions were also investigated. The phase composition of the coating, which was prepared using 0.2 wt % boron (B), was composed of MoB and Mo 2 B phases. The single MoB phase was obtained using a high B content (above 0.2 wt %). The microstructure of the coating showed that MoB coating could be prepared at temperatures over 900 • C. With the increase of temperature and time, the thickness of the coating increased. The growth of the coating was also influenced by the content of NaF. With increasing content, the thickness of the coating first increased, and then decreased. In addition, the prepared coating had a high hardness (3130.85 HV), and the mass change of the coated sample was only 4.92 mg/cm 2 after isothermal oxidation at 600 • C for 100 h. The MoB coating could provide a good oxidation resistance for Mo at 600 • C.

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“…7 In order to further reduce the preparation temperature, solid-state metathesis (SSM) process was proposed to prepare molybdenum borides using MoCl 5 and MgB 2 at above 800 °C, 8 which is by far the most common and effective method for preparing molybdenum borides nanoparticles. 8,14,[16][17][18][26][27][28][29] There are also some other methods for preparing molybdenum borides, such as chemical vapor deposition 10,30 and detonation spray process 31 to prepare molybdenum borides films on Mo foil, MoAlB precursor etching treatment to synthesize lamellar MoB, 9,32 borothermal reduction of molybdenum oxide 2,33 and electrodeposition in molten salt 20,[34][35][36][37][38][39] to synthesize several molybdenum borides (Fig. 1).…”

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confidence: 99%

Preparation of MoB₂ Nanoparticles by Electrolysis of MoS₂/B Mixture in Molten NaCl-KCl at 700 °C

Liu¹,

Ma²,

Li³

et al. 2021

J. Electrochem. Soc.

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MoB2 is synthesized by the electrochemical reduction of solid MoS2/B mixture in molten NaCl-KCl at 700 oC. Unlike the traditional methods, the electrolysis method employs the low-cost MoS2 feedstock and the boronization reaction happens at a low temperature of 700 oC. The electrochemically induced boronization involves two steps: the electrochemical desulfurization to generate Mo and the reaction of Mo with B to form MoB2. The S2- released from the reduction of MoS2 transfers to the carbon anode and is oxidized to sulfur gas, realizing a green synthetic process. In addition, the influences of molar ratio of MoS2 and amorphous boron and electrolysis cell voltage on the phase composition and morphology of electrolytic products were studied. The obtained MoB2 particles possess a uniform nodular morphology. Overall, this paper provides a straightforward and green process to prepare MoB2 nanoparticles using economically affordable raw materials at low temperature, and this method can be extended to prepare other borides.

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Electrochemical boriding of molybdenum in molten borax

Cited by 9 publications

References 36 publications

Characterisation of boride layer formed on Fe–Mo binary alloys

Characterisation of boride layer formed on Fe–Mo binary alloys

Preparation and Characterization of MoB Coating on Mo Substrate

Preparation of MoB₂ Nanoparticles by Electrolysis of MoS₂/B Mixture in Molten NaCl-KCl at 700 °C

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Electrochemical boriding of molybdenum in molten borax

Cited by 9 publications

References 36 publications

Characterisation of boride layer formed on Fe–Mo binary alloys

Characterisation of boride layer formed on Fe–Mo binary alloys

Preparation and Characterization of MoB Coating on Mo Substrate

Preparation of MoB2 Nanoparticles by Electrolysis of MoS2/B Mixture in Molten NaCl-KCl at 700 °C

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Preparation of MoB₂ Nanoparticles by Electrolysis of MoS₂/B Mixture in Molten NaCl-KCl at 700 °C