Formation of MoSi2 and Si/MoSi2 coatings on TZM (Mo–0.5Ti–0.1Zr–0.02C) alloy by hot dip silicon-plating method

Zhang, Yingyi; Cui, Kunkun; Fu, Tao; Wang, Jie; Shen, Fuqiang; Zhang, Xu; Yu, Laihao

doi:10.1016/j.ceramint.2021.05.020

Cited by 61 publications

(20 citation statements)

References 43 publications

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“…It is worth noting that the surface of the coating has no cracks, holes and other defects. They find that the surface silicon concentration and grain size increase with the increase of deposition temperature and holding time, and the same conclusion has been reached by Wang et al In addition, Zhang et al [91] also report a liquid deposition Si coating on TZM substrate. The results show that the surface roughness of the coating does not simply decrease with the increase of deposition time, as shown in Figure 17e-h.…”

Section: Oxidation Behavior and Mechanism Of Cvd Coatingssupporting

confidence: 64%

Oxidation Protection of High-Temperature Coatings on the Surface of Mo-Based Alloys—A Review

Shen

Zhang

et al. 2022

Coatings

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Molybdenum and its alloys, with high melting points, excellent corrosion resistance and high temperature creep resistance, are a vital high-temperature structural material. However, the poor oxidation resistance at high temperatures is a major barrier to their application. This work provides a summary of surface modification techniques for Mo and its alloys under high-temperature aerobic conditions of nearly half a century, including slurry sintering technology, plasma spraying technology, chemical vapor deposition technology, and liquid phase deposition technology. The microstructure and oxidation behavior of various coatings were analyzed. The advantages and disadvantages of various processes were compared, and the key measures to improve oxidation resistance of coatings were also outlined. The future research direction in this field is set out.

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Section: Oxidation Behavior and Mechanism Of Cvd Coatingssupporting

confidence: 64%

Oxidation Protection of High-Temperature Coatings on the Surface of Mo-Based Alloys—A Review

Shen

Zhang

et al. 2022

Coatings

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“…It's well known that the increase of oxide layer thickness is primarily caused by the internal diffusion of O 2 [49][50][51][52], and studies have shown that alloying with active elements can effectively reduce the internal diffusion rate of O 2 [53][54][55]. For example, appropriate adding rare earth elements, on the one hand, can separate oxygen atoms at the metal-oxide interfaces and oxide scale grain boundaries and react with O 2 , thus hindering the diffusion of O 2 [56][57][58][59].…”

Section: Effects Of Rare Earth Elements On Oxidation Behaviormentioning

confidence: 99%

Rare Earth Elements Enhanced the Oxidation Resistance of Mo-Si-Based Alloys for High Temperature Application: A Review

Wang

et al. 2021

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Traditional refractory materials such as nickel-based superalloys have been gradually unable to meet the performance requirements of advanced materials. The Mo-Si-based alloy, as a new type of high temperature structural material, has entered the vision of researchers due to its charming high temperature performance characteristics. However, its easy oxidation and even “pesting oxidation” at medium temperatures limit its further applications. In order to solve this problem, researchers have conducted large numbers of experiments and made breakthrough achievements. Based on these research results, the effects of rare earth elements like La, Hf, Ce and Y on the microstructure and oxidation behavior of Mo-Si-based alloys were systematically reviewed in the current work. Meanwhile, this paper also provided an analysis about the strengthening mechanism of rare earth elements on the oxidation behavior for Mo-Si-based alloys after discussing the oxidation process. It is shown that adding rare earth elements, on the one hand, can optimize the microstructure of the alloy, thus promoting the rapid formation of protective SiO2 scale. On the other hand, it can act as a diffusion barrier by producing stable rare earth oxides or additional protective films, which significantly enhances the oxidation resistance of the alloy. Furthermore, the research focus about the oxidation protection of Mo-Si-based alloys in the future was prospected to expand the application field.

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“…where h is convective heat transfer coefficient the surface of OSS, W/m 2 k; A is the heat transfer surface area of OSS, m 2 ; ∆T is the difference between the surface of OSS and the surrounding environment, K. h can be estimated as (7).…”

Section: Mathematical Model Of Temperature Loss Of Molten Steel 231 Heat Transfer Modelmentioning

confidence: 99%

“…The steel ladle insulation layer plays a vital role in the temperature preservation of molten steel. There are many types of steel ladle insulation materials, mainly including asbestos panel, ordinary ceramic fiber panel, calcium silicate panel, clay brick and other materials [6][7][8]. At present, 10 mm or 20 mm thick asbestos sheets are mainly used for steel ladle insulating layers.…”

Section: Introductionmentioning

confidence: 99%

Physical Experiment and Numerical Simulation on Thermal Effect of Aerogel Material for Steel Ladle Insulation Layer

et al. 2021

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The selection of lining material for a steel ladle is important to heat preservation of molten steel. Aerogel insulation materials have very low thermal conductivity, however, they are rarely used in steel ladles. In this paper, the application of a new silica aerogel material on the steel ladle insulation layer is tested, and a new calculation method is designed to study its insulation effect. In other words, the ladle wall temperature is obtained by finite element model (FEM) and experiments, then the heat emission from the ladle wall is calculated by the Boltzmann mathematical model according to the ladle wall temperature, and the temperature loss of molten steel is calculated inversely according to the heat emission of ladle wall. Compared with the original steel ladle (comparison ladle), the application effect is analyzed. Due to the stable heat storage of the ladle wall after refining, the validity of the models are verified in ladle furnace (LF) process. The results show that the new calculation method is feasible, and the relevant parameter settings in the FEM and Boltzmann mathematical model are correct. Finally, after using the new aerogel insulation material, the temperature of molten steel is reduced by 16.67 °C, and the production cost is reduced by CNY 5.15/ton of steel.

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Formation of MoSi2 and Si/MoSi2 coatings on TZM (Mo–0.5Ti–0.1Zr–0.02C) alloy by hot dip silicon-plating method

Cited by 61 publications

References 43 publications

Oxidation Protection of High-Temperature Coatings on the Surface of Mo-Based Alloys—A Review

Oxidation Protection of High-Temperature Coatings on the Surface of Mo-Based Alloys—A Review

Rare Earth Elements Enhanced the Oxidation Resistance of Mo-Si-Based Alloys for High Temperature Application: A Review

Physical Experiment and Numerical Simulation on Thermal Effect of Aerogel Material for Steel Ladle Insulation Layer

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