Low cost electroless nickel black coatings for photothermal conversion

Kumar, Sanjeet; Malhotra, L.K.; Chopra, K. L.

doi:10.1016/0165-1633(80)90003-9

Cited by 35 publications

(16 citation statements)

References 2 publications

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“…Many studies have investigated the origin of the broadband ultralow reflectance of porous NiP black surfaces in terms of the phosphorus concentration during electroless plating [15,17,24], oxidization process conditions [15,18], surface morphology [15,18,20], and composition after oxidation [1,19,25]. Those studies attributed the low reflectance of porous NiP black surfaces to optical absorption by the oxidized nickel surface and optical trapping by the microscopic surface morphology, which enhances the absorption.…”

Section: Introductionmentioning

confidence: 99%

“…Low-reflectance materials have many applications, such as in photothermal conversion of solar energy [1][2][3][4] and photothermal detectors [5][6][7][8][9]. Currently available broadband low-reflectance materials include gold black [7]; carbon nanotubes (CNTs) [8][9][10][11][12][13]; black nickels [3,4,14], including porous nickelphosphorus (NiP) black surfaces [1,[15][16][17][18][19][20]; and black paint.…”

Section: Introductionmentioning

confidence: 99%

“…Currently available broadband low-reflectance materials include gold black [7]; carbon nanotubes (CNTs) [8][9][10][11][12][13]; black nickels [3,4,14], including porous nickelphosphorus (NiP) black surfaces [1,[15][16][17][18][19][20]; and black paint. Antireflection textured surfaces [21][22][23] are also categorized as low-reflectance surfaces; the texture of a nondispersive material provides nearly perfect transmission rather than high absorption [23].…”

Section: Introductionmentioning

confidence: 99%

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Comprehensive characterization of broadband ultralow reflectance of a porous nickel–phosphorus black surface by numerical simulation

et al. 2012

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Porous nickel-phosphorus (NiP) black surfaces exhibit excellent low reflectance in the visible and near-IR regions. Through use of a model of the surface morphology and composition, the reflectance was numerically simulated by a three-dimensional finite-difference time-domain method to determine the origin of the low reflectance. In agreement with experimental results, the simulations showed a spectrally flat, quite low reflectance of <0.1% over the entire visible-near-IR region under certain conditions. The reflectance depended strongly on the thickness of the black nickel oxide layer and the aspect ratio of the three-dimensional surface morphology. A method of validating the reflectance of porous NiP black surfaces is suggested.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comprehensive characterization of broadband ultralow reflectance of a porous nickel–phosphorus black surface by numerical simulation

et al. 2012

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“…Consequently, the pores trap any incident light in wide spectral range. The black color of nickel-phosphorous coating is due to this unique surface morphology as well to the formation of nickel oxides (NiO, Ni 2 O 3 ) and some nickel phosphate [13,14].…”

Section: Morphological Studiesmentioning

confidence: 99%

Studies on black electroless nickel coatings on titanium alloys for spacecraft thermal control applications

et al. 2009

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A process of blackening of electroless nickel coating is investigated to produce ultra black coating on titanium alloys with higher optical properties. Process optimization was carried out by investigating the influence of various operating conditions, namely, processing time of etching solutions, thickness of electroless nickel deposit, temperature of blackening solutions, and pH of electroless nickel solution on the physico-optical properties of the black coating. It was observed that an optimum thickness of 35 ? 5 lm of electroless nickel is required to achieve the ultra high optical properties after blackening. Energy dispersive X-ray spectroscopy studies suggested that films containing *7% phosphorous are good for further blackening. Scanning electron and optical microscopic studies confirmed that the surface morphology played the major role to get the ultra high optical properties. The environmental tests, namely, humidity, corrosion resistance, thermal cycling, thermo vacuum performance, and thermal stability tests were used to evaluate the space worthiness of the coating. Optical properties of the coating were measured before and after each environmental test to ascertain its stability. The blackened electroless nickel provides higher optical properties in the order of *0.85; this coating has good adhesion, uniformity, and stability in adverse space conditions. Hence, these coatings were extremely suitable for spacecraft thermal control applications.

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“…Common methods for producing such coatings are anodizing the metal with an inorganic black coloring process [8,[11][12][13][14] and electroless deposition of nickel oxide coating [9,[15][16][17]. Both methods are time consuming and require several process steps, such as substrate surface pre-treatment.…”

Section: Introductionmentioning

confidence: 99%

Wet deposition of carbon nanotube black coatings for stray light reduction in optical systems

Azoubel

Cohen

Magdassi

2015

Surface and Coatings Technology

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Low cost electroless nickel black coatings for photothermal conversion

Cited by 35 publications

References 2 publications

Comprehensive characterization of broadband ultralow reflectance of a porous nickel–phosphorus black surface by numerical simulation

Comprehensive characterization of broadband ultralow reflectance of a porous nickel–phosphorus black surface by numerical simulation

Studies on black electroless nickel coatings on titanium alloys for spacecraft thermal control applications

Wet deposition of carbon nanotube black coatings for stray light reduction in optical systems

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