Low-Temperature Cyclic Oxidation Behavior of MoSi&lt;SUB&gt;2&lt;/SUB&gt;/SiC Nanocomposite Coating Formed on Mo Substrate

Yoon, Jin‐Kook; Lee, Kyunghwan; Kim, Gyeung-Ho; Han, Jun Hyun; Doh, Jung-Mann; Hong, Kwangjoon

doi:10.2320/matertrans.45.2435

Cited by 27 publications

(6 citation statements)

References 16 publications

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“…The mass change curve of coatings during oxidation is reported to basically follow the law of parabola, [ 62–64 ] and the fitting curve of mass gain of the coatings after oxidation for 0–40 h is shown in Figure 8. The mass gain of MS and MC coatings versus t 0.5 shows an approximate linear rule and the mutual relationship is given by the following equation.

Δ m_{s} = 0.488 \sqrt{t}

Δ m_{c} = 0.509 \sqrt{t}

…”

Section: Resultsmentioning

confidence: 99%

Microstructural Characterization and Anti‐Oxidation Properties of Molybdenum Disilicide Coating on Niobium by Spent MoSi₂‐Based Materials

et al. 2020

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MoSi2 coatings are prepared using spent and commercial MoSi2 powders as raw materials to protect niobium (Nb) substrate by spark plasma sintering (SPS) technique, and the microstructure and oxidation resistance of the coatings at 1500 °C are investigated. Results showed that obvious pores are found in MoSi2 coating using commercial MoSi2 (MC coating) after SPS while MoSi2 coating using spent MoSi2 (MS coating) is dense with low porosity. (Mo,Nb)5Si3 diffusion layer is generated between MS coating and the substrate with no gap or cracks, showing excellent metallurgical bonding. After long‐term oxidation at elevated temperature, pores and exposed Mo5Si3 can be observed in the oxide scale of MC coating, while dense and complete oxide scale is obtained by MS coating. Lowest mass gain (2.78 mg cm−2) is acquired by MS coating after oxidation at 1500 °C for 40 h because SiO2 oxide scale is completely formed on the dense and bentonite‐containing coating, blocking the diffusion of oxygen at high temperature. Compared with MC coating, no further oxidation occurs inside the MS coating or substrate, exhibiting better high‐temperature oxidation resistance.

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Δ m_{s} = 0.488 \sqrt{t}

Δ m_{c} = 0.509 \sqrt{t}

…”

Section: Resultsmentioning

confidence: 99%

Microstructural Characterization and Anti‐Oxidation Properties of Molybdenum Disilicide Coating on Niobium by Spent MoSi₂‐Based Materials

et al. 2020

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“…It is obvious that H 2 is often used as a carrier gas in the preparation of coatings. The images of the CVD coatings are shown in Figure 11 [71,72,75]. It can be seen that the coatings have a dense and homogeneous surface morphology with a granular structure, as shown in Figure 11a,b.…”

Section: Coatings Prepared By Plasma-spraying Technique 221 Microstructure and Growth Mechanism Of Plasma-spraying Coatingsmentioning

confidence: 98%

“…The principle behind chemical vapor deposition (CVD) technology is the process of using gaseous substances reacting with a solid substrate to generate solid deposits [69,70]. The process conditions and mechanical properties of the oxidation-resistant coatings prepared on molybdenum by the CVD technique as shown in Table 6 [71][72][73][74][75]. It is obvious that H 2 is often used as a carrier gas in the preparation of coatings.…”

Section: Coatings Prepared By Plasma-spraying Technique 221 Microstructure and Growth Mechanism Of Plasma-spraying Coatingsmentioning

confidence: 99%

“…Table 7 shows the microstructure evolution and mass gain of CVD coatings before and after oxidation under different conditions. Obviously, researchers mainly reported the oxidation of the coating at low temperature (500 • C to 1000 • C), and the oxidized coatings mainly consist of an oxide layer, intermediate layer and interface layer [71][72][73][74][75]78]. The images of CVD coatings after low-temperature cyclic oxidation are shown in Figure 13.…”

Section: Oxidation Behavior and Mechanism Of Cvd Coatingsmentioning

confidence: 99%

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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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“…Also the addition SiC had a significant influence on the behavior of MoSi 2 , by forming a protective SiO 2 layer leading to its exhibiting outstanding oxidation resistance [16]. As a matter of fact, MoSi 2 and SiC are compatible and stable up to 1600…”

Section: Introductionmentioning

confidence: 99%

Microstructures and Mechanical Properties of Hot-Pressed -Matrix Composites Reinforced with SiC and Particles

Zhou

2012

ISRN Materials Science

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MoSi 2 -matrix composites reinforced with Si 3 N 4 and SiC particles were fabricated by means of wet-mixing and heat-pressing process. Scanning electron microscope (SEM), X-ray diffractometry (XRD), polarizing microscopy, Vickers hardness tester, with a universal materials testing machine were used to investigate the morphology, grain size, hardness, fracture toughness, and bending strength of the synthesized composites. Notable effects on the bending strength and fracture toughness of MoSi 2 caused by the addition of SiC and Si 3 N 4 particles were found. The MoSi 2 composite with 20 vol.% SiC and 20 vol.% Si 3 N 4 particles has the highest strength and toughness, which is about 100% and 340%, respectively, higher than that of pure MoSi 2 . The grain size of MoSi 2 decreases gradually with the volume content of SiC and Si 3 N 4 particles increasing from 0% to 40%, and MoSi 2 -20 vol% SiC-20 vol% Si 3 N 4 composite exhibits the minimum grain size of MoSi 2 . The relationship between the grain size of MoSi 2 and bending strength is not entirely fit with Hall-Petch equation. The strengthening mechanisms of the composite include fine-grain strengthening and dispersion strengthening. The toughening mechanisms of the composite include fine grain, microcracking, crack deflection, crack microbridging, and crack branching.

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Low-Temperature Cyclic Oxidation Behavior of MoSi<SUB>2</SUB>/SiC Nanocomposite Coating Formed on Mo Substrate

Cited by 27 publications

References 16 publications

Microstructural Characterization and Anti‐Oxidation Properties of Molybdenum Disilicide Coating on Niobium by Spent MoSi₂‐Based Materials

Microstructural Characterization and Anti‐Oxidation Properties of Molybdenum Disilicide Coating on Niobium by Spent MoSi₂‐Based Materials

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

Microstructures and Mechanical Properties of Hot-Pressed -Matrix Composites Reinforced with SiC and Particles

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Low-Temperature Cyclic Oxidation Behavior of MoSi<SUB>2</SUB>/SiC Nanocomposite Coating Formed on Mo Substrate

Cited by 27 publications

References 16 publications

Microstructural Characterization and Anti‐Oxidation Properties of Molybdenum Disilicide Coating on Niobium by Spent MoSi2‐Based Materials

Microstructural Characterization and Anti‐Oxidation Properties of Molybdenum Disilicide Coating on Niobium by Spent MoSi2‐Based Materials

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

Microstructures and Mechanical Properties of Hot-Pressed -Matrix Composites Reinforced with SiC and Particles

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Product

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Microstructural Characterization and Anti‐Oxidation Properties of Molybdenum Disilicide Coating on Niobium by Spent MoSi₂‐Based Materials

Microstructural Characterization and Anti‐Oxidation Properties of Molybdenum Disilicide Coating on Niobium by Spent MoSi₂‐Based Materials