Enhanced thermal stability of Mo film with low infrared emissivity by a TiN barrier layer

Sun, Binghui; Wang, Lei; Sun, Ying; Gao, Junhua; Cao, Hongtao; Ren, Jie; Cui, Jin; Yuan, Xiuliang; Li, Aoyu

doi:10.1016/j.apsusc.2021.151368

Cited by 10 publications

(6 citation statements)

References 61 publications

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“…As a result, the IR radiation performance of MCFCCO in the 0.78−14 µm wave band remains stable, with only a slight decrease by 2.1% observed after annealing at 1300 °C for 100 h (Figure 3e,f). The slight change should be ascribed to the increased grain sizes, [ 61,62 ] as shown in Figures S17 and S18 and Table S5 (Supporting Information). The entropy‐stabilized effect is responsible for the high‐temperature robustness of the material, which overcomes the effect of enthalpy gain and leads to a decrease in Gibbs free energy.…”

Section: Resultsmentioning

confidence: 99%

High‐Entropy Engineering for Broadband Infrared Radiation

Wang

Liu

et al. 2023

Adv Funct Materials

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Developing high‐performance infrared (IR) radiation materials with desired broadband emissivity, excellent thermal stability, and scalable fabrication processes is highly desirable for energy‐saving applications and heat dissipation. However, it remains a grand challenge to concurrently meet these requirements in existing IR radiation materials. Herein, a high‐entropy (HE) approach is employed to advance the IR radiation performance of spinel oxide. This strategy efficiently narrows the bandgap due to the enhanced electron transitions and the introduction of oxygen vacancies (Ov), variable‐valence behavior, and orbital hybridization. In addition, the lattice distortion effect lowers the symmetry of lattice vibration. Therefore, the resulting HE spinel oxide exhibits near‐blackbody radiation performance, with its emissivity approximately three times higher than that of the binary spinel oxide. Moreover, the entropy‐dominating phase stabilization effect contributes to impressive thermal stability (stable at 1300 °C for 100 h). This makes it suitable for high‐temperature thermal radiation applications, such as energy conservation in industrial high‐temperature furnaces. More importantly, the HE spinel oxide can be readily spray‐coated on various substrates. And the coating on stainless steel reaches an outstanding emissivity of 0.943 in the 0.78−16 µm wavelength range. All these merits render the HE approach competitive for the development of high‐emissivity and thermally stable thermal radiation materials.

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Section: Resultsmentioning

confidence: 99%

High‐Entropy Engineering for Broadband Infrared Radiation

Wang

Liu

et al. 2023

Adv Funct Materials

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“…Figure presents the schematic diagram of the multilayer SSAC. In addition to the traditional four-layer structure, a TiN layer is inserted between the SS substrate and the IR layer, which acts as a barrier layer and prevents the elemental diffusion from the SS substrate to the above coating at high temperatures . In order to design the structure of multilayer SSACs, it is necessary to characterize the properties of each single layer.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The reason for the large blueshift at 700 °C of the SSAC deposited on the quartz glass substrate is a little complex. Several factors, such as the further densification of the SSAC, the improvement of Mo film’s reflectance induced by its recrystallization at 700 °C, , and the slight elemental diffusions at the transition region between the single layers, could all simultaneously contribute to the large-scale blueshift. The blueshift results in a decrease of absorptivity from 0.953 to 0.916 for the WN x -Si 3 N 4 SSAC deposited on the quartz glass substrate.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Compared with TiN nanoparticles, the TiN film exhibits great thermal stability above 700 °C. 34 The optical properties and the crystal structures of the prepared single layers were studied first. According to the optical parameters of each single layer, we made a film structural design and property optimization for the WN x -Si 3 N 4 SSAC.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, a TiN/Mo/WN x -Si 3 N 4 bilayer/SiO 2 SSAC (named WN x -Si 3 N 4 SSAC hereafter) is proposed and the TiN film (150 nm) is introduced as the diffusion barrier layer. Compared with TiN nanoparticles, the TiN film exhibits great thermal stability above 700 °C . The optical properties and the crystal structures of the prepared single layers were studied first.…”

Section: Introductionmentioning

confidence: 99%

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Optical Performance, Thermal Stability, and Failure Analysis of the WN_x-Si₃N₄ Multilayer Solar Selective Absorbing Coatings

Sun

Wang

Sun

et al. 2022

ACS Appl. Energy Mater.

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The development of high-temperature-tolerance solar selective absorbing coatings (SSACs) is beneficial to improve the conversion efficiency of concentrated solar power. In the present work, a TiN/Mo/WN x -Si 3 N 4 bilayer/SiO 2 cermet-based SSAC was developed, which was deposited on different substrates by magnetron sputtering. The designed WN x -Si 3 N 4 SSAC exhibits a high solar absorptivity of 0.952, accompanied by a relatively low emissivity of 0.059 at 25 °C and 0.134 deduced at 600 °C. Moreover, the WN x -Si 3 N 4 SSAC deposited on a stainless-steel (SS) substrate shows great thermal stability at 650 °C in vacuum. The solar absorptivity shows a slight decrease from 0.952 to 0.939 and the emissivity at 25 °C decreases from 0.059 to 0.045 after being annealed at 650 °C in vacuum. Furthermore, when being annealed at 700 °C in vacuum, the WN x -Si 3 N 4 SSAC deposited on the quartz glass substrate still keeps stable, but the coating on the SS substrate is dramatically destroyed. A comprehensive failure analysis was conducted utilizing FT-IR, SEM, Raman, and XPS characterizations. The degradation of the WN x -Si 3 N 4 SSAC deposited on the SS substrate at 700 °C is caused by the severe elemental diffusion between the absorbing layers and the antireflection layer. Moreover, the cracks induced by the thermal stress provide rapid channels for elemental diffusion.

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Low dielectric loss and infrared emissivity coating with enhanced mechanical property by grafting modification of EPDM

Zhou

Wang

Gao

et al. 2022

Infrared Physics & Technology

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Enhanced thermal stability of Mo film with low infrared emissivity by a TiN barrier layer

Cited by 10 publications

References 61 publications

High‐Entropy Engineering for Broadband Infrared Radiation

High‐Entropy Engineering for Broadband Infrared Radiation

Optical Performance, Thermal Stability, and Failure Analysis of the WN_x-Si₃N₄ Multilayer Solar Selective Absorbing Coatings

Low dielectric loss and infrared emissivity coating with enhanced mechanical property by grafting modification of EPDM

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Enhanced thermal stability of Mo film with low infrared emissivity by a TiN barrier layer

Cited by 10 publications

References 61 publications

High‐Entropy Engineering for Broadband Infrared Radiation

High‐Entropy Engineering for Broadband Infrared Radiation

Optical Performance, Thermal Stability, and Failure Analysis of the WNx-Si3N4 Multilayer Solar Selective Absorbing Coatings

Low dielectric loss and infrared emissivity coating with enhanced mechanical property by grafting modification of EPDM

Contact Info

Product

Resources

About

Optical Performance, Thermal Stability, and Failure Analysis of the WN_x-Si₃N₄ Multilayer Solar Selective Absorbing Coatings