Surface roughness and thermal stability of graded cermet photothermal absorber coatings with very high absorptivities

Glen A. Nyberg; H. G. Craighead; R. A. Buhrman

doi:10.1016/0040-6090(82)90619-8

Surface roughness and thermal stability of graded cermet photothermal absorber coatings with very high absorptivities

Glen A. Nyberg, H. G. Craighead, R. A. Buhrman

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

MoAl₂O₃ and PtAl₂O₃ cermet coatings can be roughend by the use of a high substrate temperature during deposition. This effect can be used to raise significantly the efficiency of graded-index photothermal absorbers made from these coatings. Roughness lowers the stability in air of MoAl₂O₃ absorbers but has little effect on vacuum stability. The stability in air of PtAl₂O₃ absorbers is little affected by roughness. Thus roughened PtAl₂O₃ (MoAl₂O₃) absorbers seem to be extremely well suited for in-air (evaluated) collector applications operating at high temperatures and under a high concentrations of solar flux.

Original language	English (US)
Pages (from-to)	185-190
Number of pages	6
Journal	Thin Solid Films
Volume	96
Issue number	2
DOIs	https://doi.org/10.1016/0040-6090(82)90619-8
State	Published - Oct 8 1982

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Surfaces and Interfaces
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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10.1016/0040-6090(82)90619-8

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title = "Surface roughness and thermal stability of graded cermet photothermal absorber coatings with very high absorptivities",

abstract = "MoAl2O3 and PtAl2O3 cermet coatings can be roughend by the use of a high substrate temperature during deposition. This effect can be used to raise significantly the efficiency of graded-index photothermal absorbers made from these coatings. Roughness lowers the stability in air of MoAl2O3 absorbers but has little effect on vacuum stability. The stability in air of PtAl2O3 absorbers is little affected by roughness. Thus roughened PtAl2O3 (MoAl2O3) absorbers seem to be extremely well suited for in-air (evaluated) collector applications operating at high temperatures and under a high concentrations of solar flux.",

author = "Nyberg, {Glen A.} and Craighead, {H. G.} and Buhrman, {R. A.}",

note = "Funding Information: We thank Professor A. J. Sievers for very useful advice. This research was supported in part by the U.S. Department of Energy, Grant DE-FG02-FG02-80CS83113. Additional support was received from the National Science Foundation through the Cornell Materials Science Center. Copyright: Copyright 2014 Elsevier B.V., All rights reserved.",

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doi = "10.1016/0040-6090(82)90619-8",

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T1 - Surface roughness and thermal stability of graded cermet photothermal absorber coatings with very high absorptivities

AU - Nyberg, Glen A.

AU - Craighead, H. G.

AU - Buhrman, R. A.

N1 - Funding Information: We thank Professor A. J. Sievers for very useful advice. This research was supported in part by the U.S. Department of Energy, Grant DE-FG02-FG02-80CS83113. Additional support was received from the National Science Foundation through the Cornell Materials Science Center. Copyright: Copyright 2014 Elsevier B.V., All rights reserved.

PY - 1982/10/8

Y1 - 1982/10/8

N2 - MoAl2O3 and PtAl2O3 cermet coatings can be roughend by the use of a high substrate temperature during deposition. This effect can be used to raise significantly the efficiency of graded-index photothermal absorbers made from these coatings. Roughness lowers the stability in air of MoAl2O3 absorbers but has little effect on vacuum stability. The stability in air of PtAl2O3 absorbers is little affected by roughness. Thus roughened PtAl2O3 (MoAl2O3) absorbers seem to be extremely well suited for in-air (evaluated) collector applications operating at high temperatures and under a high concentrations of solar flux.

AB - MoAl2O3 and PtAl2O3 cermet coatings can be roughend by the use of a high substrate temperature during deposition. This effect can be used to raise significantly the efficiency of graded-index photothermal absorbers made from these coatings. Roughness lowers the stability in air of MoAl2O3 absorbers but has little effect on vacuum stability. The stability in air of PtAl2O3 absorbers is little affected by roughness. Thus roughened PtAl2O3 (MoAl2O3) absorbers seem to be extremely well suited for in-air (evaluated) collector applications operating at high temperatures and under a high concentrations of solar flux.

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Surface roughness and thermal stability of graded cermet photothermal absorber coatings with very high absorptivities

Abstract

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