Influence of temperature-induced copper diffusion on degradation of selective chromium oxy-nitride solar absorber coatings

Kotilainen, Minna; Honkanen, Mari; Mizohata, Kenichiro; Vuoristo, Petri

doi:10.1016/j.solmat.2015.10.034

Cited by 26 publications

(9 citation statements)

References 28 publications

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“…Kotilainen et al studied the influence of temperature-induced copper diffusion on the degradation of selective chromium oxynitride solar absorber coating. They recorded a diffusion of copper from the substrate into the coating and through the coating to the surface [14]. In our previous studies [15,16], the Rutherford Backscattering Spectrometry (RBS) and the Time of Flight Elastic Recoil Detection Analysis (TOF-ERDA) methods were very efficient to detect a very small amount of tungsten diffused from the back-reflection layer towards stainless-steel substrate, and some Cr diffused from inner layers, mainly the oxynitride layer, to the anti-reflection oxide layer.…”

Section: Introductionmentioning

confidence: 99%

CrAlSiN barrier layer to improve the thermal stability of W/CrAlSiNx/CrAlSiOyNx/SiAlOx solar thermal absorber

AL-Rjoub

Rebouta

Vieira

et al. 2019

Solar Energy Materials and Solar Cells

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A B S T R A C TThe influence of adding CrAlSiN barrier layer between the back-reflector tungsten (W) and stainless-steel substrate on thermal stability has been investigated. In previous work, after the annealing in vacuum at 600°C, tungsten diffusion from the back-reflection layer towards the stainless-steel substrate was found. In this study, a barrier layer was added and its influence upon the W diffusion was studied. Several designs of multilayer solar selective absorber for high temperature applications were used to test the thermal and chemical stability and oxidation resistance after vacuum annealing. These samples were characterized by Scanning Electron Microscopy (SEM), Rutherford Backscattering Spectrometry (RBS), X-ray diffraction (XRD), Fourier-transform Infrared Spectroscopy (FTIR) and UV-VIS-NIR spectroscopy. All absorber tandems show good thermal stability after vacuum annealing at 600°C and the changes in optical constants solar absorptance (α) and thermal emittance (ε) are negligible. In some cases, small changes in the reflectance curves after the first step of annealing were seen. Some changes were found in the oxide layer, due to the incomplete oxidized Si atoms, as confirmed by FTIR analyses. This cannot justify the increase of NIR reflectance observed in the optical stacks after annealing, which can be due to the phase changes of the back-reflector tungsten layer. All layers of stacks are amorphous, except the tungsten layer, which is polycrystalline and shows a columnar growth. The addition of a CrAlSiN P = 0.11 Pa barrier layer between tungsten and stainless-steel substrate proved to be a good solution to control the diffusion of W atoms towards the substrate, whereas using higher nitrogen partial pressure in the high and the low absorption layers reduce the diffusion of Cr from those layers to surface.

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Section: Introductionmentioning

confidence: 99%

CrAlSiN barrier layer to improve the thermal stability of W/CrAlSiNx/CrAlSiOyNx/SiAlOx solar thermal absorber

AL-Rjoub

Rebouta

Vieira

et al. 2019

Solar Energy Materials and Solar Cells

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“…Due to their high thermal conductivity and excellent corrosion resistance, Cu and its alloys are extensively used in many heat exchange applications. In particular, copper is commonly utilized as a substrate for solar selective absorbers in solar thermal collectors [1,2], while Cu alloys are widely used as combustion chamber liner materials in rocket engines [3]. During operation in these applications, copper components suffer from extremely high thermal loads.…”

Section: Introductionmentioning

confidence: 99%

“…Second, at elevated temperatures copper atoms become mobile, which induces their upward diffusion when Cu-based materials are used as substrates in multilayer structures [9]. As a result, Cu atoms penetrate through above layers and react with oxygen to form copper oxide hillocks on the surface [1,2]. This mechanism leads to material depletion and the formation of Kirkendall voids in the copper substrate causing porosity and loss of strength [1].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Thermal Cycling Resistance of AlxSi1−xN Coatings on Cu Substrates by Optimizing Al/Si Ratio

et al. 2019

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The effect of the elemental composition of AlxSi1−xN coatings deposited on Cu substrates by magnetron sputtering on their structure, mechanical properties and thermal cycling performance is studied. The coatings with Al-Si-N solid solution, two-phase (AlxSi1−xN nanocrystallites embedded in the SixNy tissue phase) and amorphous structure were obtained by varying Al/Si ratio. It is shown that polycrystalline coatings with a low Si content (Al0.88Si0.12N) are characterized by the highest thermal cycling resistance. While the coatings with a high and intermediate Si content (Al0.11Si0.89N and Al0.74Si0.26N) were subjected to cracking and spallation after the first cycle of annealing at a temperature of 1000 °C, delamination of the Al0.88Si0.12N coating was observed after 25 annealing cycles. The Al0.88Si0.12N coating also exhibited the best barrier performance against copper diffusion from the substrate. The effect of thermal stresses on the diffusion barrier performance of the coatings against copper diffusion is discussed.

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“…As one of the cermet coatings, AlCr based multi-layer solar selective absorbing coating is widely used to obtain high spectral selective property [3][4][5][6][7]. H.D.…”

Section: Introductionmentioning

confidence: 99%

The fabrications and optical properties of AlCrNO based Solar Selective Absorber Coatings by cathodic arc ion plating

Xu¹,

Gong²,

Niu³

et al. 2018

Proceedings of the 4th Annual International Conference on Material Engineering and Application (ICMEA 2017)

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Abstract-A series of AlCrNO based solar selective absorber coatings were deposited by cathodic arc ion plating on three kinds of different infrared reflectors (AlCr, Cu, Cr) and with different deposition currents respectively. The surface morphology, phase structure and surface roughness were characterized by field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and roughmeter respectively. The results show that the AlCr-AlCrNO based coating exhibited a high absorptance of 0.91 and an emittance of 0.52 when AlCr was served as infrared reflector. Meanwhile, a higher absorptance (α=0.92) of AlCr-AlCrNO based coating was obtained when varying deposition current from 50 A to 60 A. Moreover, the roughness is one of impacts on the emittance. Increasing the deposition current to 70 A brings about the raising of the roughness, increasing the emittance therefore.

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Influence of temperature-induced copper diffusion on degradation of selective chromium oxy-nitride solar absorber coatings

Cited by 26 publications

References 28 publications

CrAlSiN barrier layer to improve the thermal stability of W/CrAlSiNx/CrAlSiOyNx/SiAlOx solar thermal absorber

CrAlSiN barrier layer to improve the thermal stability of W/CrAlSiNx/CrAlSiOyNx/SiAlOx solar thermal absorber

Improvement of Thermal Cycling Resistance of AlxSi1−xN Coatings on Cu Substrates by Optimizing Al/Si Ratio

The fabrications and optical properties of AlCrNO based Solar Selective Absorber Coatings by cathodic arc ion plating

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