Preparation and investigation of MoSi2/SiC coating with high infrared emissivity at high temperature

Mao, Jiawei; Ding, Siyu; Li, Yongjia; Li, Shuhao; Liu, Fusheng; Zeng, Xian

doi:10.1016/j.surfcoat.2018.12.036

Cited by 44 publications

(9 citation statements)

References 38 publications

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“…Based on the thermal radiation theory, we consider that the high absorbance of the HEO powder is mainly due to the following reasons: lattice imperfection (oxygen vacancy) and small band gap ( E g ). − The smaller E g is beneficial to the transition of electrons from the valence band (VB) to the conduction band (CB), which will increase the concentration of free carriers in the band gap and improve the infrared emissivity. The value of E g can be evaluated by using Tauc’s equation: where α is the absorbance, h ν is the photon energy, and k is the material-dependent constant.…”

Section: Results and Discussionmentioning

confidence: 99%

Entropy-Assisted High-Entropy Oxide with a Spinel Structure toward High-Temperature Infrared Radiation Materials

Guo

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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Developing advanced materials with a high-entropy concept is one of the hot trends in materials science. The configurational entropy of high-entropy materials can be tuned by introducing different atomic species, which can also impart a result in excellent physical and chemical properties. In this work, we synthesized a solid-solution oxide (Cu, Mn, Fe, Cr) 3 O 4 by a simple and scalable solid-phase synthesis method. We extensively investigated the microstructure and chemical composition, indicating that (Cu, Mn, Fe, Cr) 3 O 4 has a single-phase spinel structure. Simultaneously, we reasonably evaluated the position occupied by the elements of (Cu, Mn, Fe, Cr) 3 O 4 in a spinel structure as (Cu 0.75 Fe 0.25 )(Fe 0.25 Cr 0.375 Mn 0.375 ) 2 O 4 . Here, we first evaluated the infrared radiation performance of (Cu, Mn, Fe, Cr) 3 O 4 . The new, high-entropy oxide (HEO) (Cu, Mn, Fe, Cr) 3 O 4 powder exhibits high infrared emissivity values of 0.879 and 0.848 in the wavelengths of 0.78−2.5 and 2.5−16 μm, respectively, and has excellent thermal stability. More importantly, the infrared emissivity values of as-prepared HEO coating reach 0.955 (0.78−2.5 μm) at room temperature and 0.936 (3−16 μm) at 800 °C. This work provides a viable strategy toward the laboratory mass production of this HEO for infrared radiation materials, which shows great potential in the energy-related applications.

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Section: Results and Discussionmentioning

confidence: 99%

Entropy-Assisted High-Entropy Oxide with a Spinel Structure toward High-Temperature Infrared Radiation Materials

Guo

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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“…In the process of plasma spraying, the temperature of the plasma arc was about 10,000 °C [ 28 ], which is much higher than the oxidation temperature of MoSi 2 . Therefore, the raw materials are oxidized to form Mo 5 Si 3 , SiO 2 and Mo according to the Equations (1) and (2) [ 29 , 30 , 31 , 32 ]. SiO 2 is an amorphous phase, and its amount is relatively small; therefore, no SiO 2 phase is detected in XRD patterns.…”

Section: Resultsmentioning

confidence: 99%

Effect of Spraying Power on Oxidation Resistance of MoSi2-ZrB2 Coating for Nb-Si Based Alloy Prepared by Atmospheric Plasma

Zhuo

Jiang

et al. 2020

Materials

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The MoSi2-ZrB2 coatings were prepared on Nb-Si based alloy by atmospheric plasma spraying with the spraying power 40, 43 and 45 kW. The effect of spraying power on the microstructure and oxidation resistance of MoSi2-ZrB2 coating at 1250 °C were studied. The results showed that the main constituent phases of coatings were MoSi2 at all spraying power. The coating became more compact as the spraying power increased. The coating prepared at 45 kW was dense and uniform, which exhibited the best oxidation resistance due to the formation of a dense and uniform glass layer consisting of SiO2 and ZrSiO4.

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“…Currently, diverse methods have been used to improve the high infrared radiation properties of coatings, such as compounding of radiation base materials, doping of impurity elements, and control of crystal morphology. 1,[13][14][15] Especially, ion doping may easily destroy the periodicity of the lattice and introduce surface oxygen vacancies (OVs) into the crystals, which are recognized as an efficient way to embellish the electronic structure and optical absorption property of materials. 16,17 As reported, the octahedral site preference energy of Ni 2+ is 22.8 kcal mol −1 , which is much higher than that of Cu 2+ (15.2 kcal mol −1 ) and Fe 3+ (0 kcal mol −1 ), 18,19 that is to say, the B site is more easily to be occupied by Ni 2+ if Ni 2+ and Cu 2+ are simultaneously introduced.…”

Section: Introductionmentioning

confidence: 99%

Band gap and oxygen vacancy engineering of honeycomb‐like CuFe₂O₄ spinels toward enhanced high infrared emissivity

et al. 2023

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Recently, copper ferrites have acquired widespread attraction in high infrared radiation fields owing to their remarkable cost efficiency. However, to achieve broader applications under various operating conditions, it is essential to further improve the infrared emissivity, particularly at high temperatures. Herein, the Ni‐doped CuFe2O4 (NCFO) honeycomb‐like frameworks, which are constructed with single‐crystal nano‐subunits, are successfully fabricated via the scalable sol–gel avenue. The unique porous honeycomb framework endows NCFO with enhanced infrared absorption and relieves the stress between coatings and substrates meanwhile. With both band gap and oxygen vacancy (OV) engineering of CuFe2O4 itself via smart Ni doping, a maximum lattice strain, the richest OVs, and the narrowest band gap (∼1.63 eV) are simultaneously achieved for the CuFe2O4 with 15% Ni doping (denoted as CNFO‐15). Benefiting from the synergy of these external and intrinsic contributions, the CNFO‐15 possesses an ultrahigh infrared emissivity (∼0.975) in the wavelength range of 3–5 µm at a test temperature of 800°C. Moreover, the CNFO‐15‐based coating displays superior infrared radiation performance with outstanding high‐temperature resistance. More meaningfully, the constructive design here will provide a distinctive perspective for future large‐scale fabrication of advanced high‐infrared‐emissivity coatings.

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Preparation and investigation of MoSi2/SiC coating with high infrared emissivity at high temperature

Cited by 44 publications

References 38 publications

Entropy-Assisted High-Entropy Oxide with a Spinel Structure toward High-Temperature Infrared Radiation Materials

Entropy-Assisted High-Entropy Oxide with a Spinel Structure toward High-Temperature Infrared Radiation Materials

Effect of Spraying Power on Oxidation Resistance of MoSi2-ZrB2 Coating for Nb-Si Based Alloy Prepared by Atmospheric Plasma

Band gap and oxygen vacancy engineering of honeycomb‐like CuFe₂O₄ spinels toward enhanced high infrared emissivity

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Preparation and investigation of MoSi2/SiC coating with high infrared emissivity at high temperature

Cited by 44 publications

References 38 publications

Entropy-Assisted High-Entropy Oxide with a Spinel Structure toward High-Temperature Infrared Radiation Materials

Entropy-Assisted High-Entropy Oxide with a Spinel Structure toward High-Temperature Infrared Radiation Materials

Effect of Spraying Power on Oxidation Resistance of MoSi2-ZrB2 Coating for Nb-Si Based Alloy Prepared by Atmospheric Plasma

Band gap and oxygen vacancy engineering of honeycomb‐like CuFe2O4 spinels toward enhanced high infrared emissivity

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Band gap and oxygen vacancy engineering of honeycomb‐like CuFe₂O₄ spinels toward enhanced high infrared emissivity