Preparation and thermal stress analysis of AI2o3 insulation coatings on ss-304 tape

S. Ataoglu; L. Arda; N. Kadioglu; O. Cakiroglu; O. Bulut; A. N. Gulluoglu; I. Belenli

doi:10.1109/TASC.2009.2018447

Preparation and thermal stress analysis of AI_2o3 insulation coatings on ss-304 tape

S. Ataoglu, L. Arda, N. Kadioglu, O. Cakiroglu, O. Bulut, A. N. Gulluoglu, I. Belenli

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

2 Citations (Scopus)

Abstract

A1₂O₃ insulation coatings are grown on long-length stainless steel (SS) tapes using reel-to-reel sol-gel method for applications of HTS/LTS coils and magnets. Various ceramic solutions are prepared from Al based precursors, solvent and chelating agent, the coating are fabricated on SS substrates.Al₂O₃solution was successfully obtained using Al-sec-butoxide precursor, and iso- propanol and acetylacetone as solvent and chelating agents, respectively. In order to improve adhesion of Al₂ O₃ on the SS-304 tapes, triethanolamine was used in the solution. The residual stresses are investigated at different temperature ranges, between (630, 600, 580, and 550° C) and room temperature for different thicknesses (12, 10 and 7 μm). The maximum stress values are obtained as 0.756 GPa as tension on substrate (SS) for the 12 μm coating and 1.0 GPa as compression for the 7 μm A1₂O₃ coating at 630° C. The surface morphology and microstructure of samples are characterized by a scanning electron microscope (SEM). SEM observation revealed that coatings have crack and mosaic structure.

Original language	English
Article number	5153099
Pages (from-to)	2375-2378
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	19
Issue number	3
DOIs	https://doi.org/10.1109/TASC.2009.2018447
Publication status	Published - Jun 2009
Externally published	Yes

Keywords

Al O
Electrical insulation and superconducting magnet
Sol-gel
Thermal stress

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10.1109/TASC.2009.2018447

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title = "Preparation and thermal stress analysis of AI2o3 insulation coatings on ss-304 tape",

abstract = "A12O3 insulation coatings are grown on long-length stainless steel (SS) tapes using reel-to-reel sol-gel method for applications of HTS/LTS coils and magnets. Various ceramic solutions are prepared from Al based precursors, solvent and chelating agent, the coating are fabricated on SS substrates.Al2O3solution was successfully obtained using Al-sec-butoxide precursor, and iso- propanol and acetylacetone as solvent and chelating agents, respectively. In order to improve adhesion of Al2 O3 on the SS-304 tapes, triethanolamine was used in the solution. The residual stresses are investigated at different temperature ranges, between (630, 600, 580, and 550° C) and room temperature for different thicknesses (12, 10 and 7 μm). The maximum stress values are obtained as 0.756 GPa as tension on substrate (SS) for the 12 μm coating and 1.0 GPa as compression for the 7 μm A12O3 coating at 630° C. The surface morphology and microstructure of samples are characterized by a scanning electron microscope (SEM). SEM observation revealed that coatings have crack and mosaic structure.",

keywords = "Al O, Electrical insulation and superconducting magnet, Sol-gel, Thermal stress",

author = "S. Ataoglu and L. Arda and N. Kadioglu and O. Cakiroglu and O. Bulut and Gulluoglu, {A. N.} and I. Belenli",

year = "2009",

month = jun,

doi = "10.1109/TASC.2009.2018447",

language = "English",

volume = "19",

pages = "2375--2378",

journal = "IEEE Transactions on Applied Superconductivity",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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AU - Ataoglu, S.

AU - Arda, L.

AU - Kadioglu, N.

AU - Cakiroglu, O.

AU - Bulut, O.

AU - Gulluoglu, A. N.

AU - Belenli, I.

PY - 2009/6

Y1 - 2009/6

N2 - A12O3 insulation coatings are grown on long-length stainless steel (SS) tapes using reel-to-reel sol-gel method for applications of HTS/LTS coils and magnets. Various ceramic solutions are prepared from Al based precursors, solvent and chelating agent, the coating are fabricated on SS substrates.Al2O3solution was successfully obtained using Al-sec-butoxide precursor, and iso- propanol and acetylacetone as solvent and chelating agents, respectively. In order to improve adhesion of Al2 O3 on the SS-304 tapes, triethanolamine was used in the solution. The residual stresses are investigated at different temperature ranges, between (630, 600, 580, and 550° C) and room temperature for different thicknesses (12, 10 and 7 μm). The maximum stress values are obtained as 0.756 GPa as tension on substrate (SS) for the 12 μm coating and 1.0 GPa as compression for the 7 μm A12O3 coating at 630° C. The surface morphology and microstructure of samples are characterized by a scanning electron microscope (SEM). SEM observation revealed that coatings have crack and mosaic structure.

AB - A12O3 insulation coatings are grown on long-length stainless steel (SS) tapes using reel-to-reel sol-gel method for applications of HTS/LTS coils and magnets. Various ceramic solutions are prepared from Al based precursors, solvent and chelating agent, the coating are fabricated on SS substrates.Al2O3solution was successfully obtained using Al-sec-butoxide precursor, and iso- propanol and acetylacetone as solvent and chelating agents, respectively. In order to improve adhesion of Al2 O3 on the SS-304 tapes, triethanolamine was used in the solution. The residual stresses are investigated at different temperature ranges, between (630, 600, 580, and 550° C) and room temperature for different thicknesses (12, 10 and 7 μm). The maximum stress values are obtained as 0.756 GPa as tension on substrate (SS) for the 12 μm coating and 1.0 GPa as compression for the 7 μm A12O3 coating at 630° C. The surface morphology and microstructure of samples are characterized by a scanning electron microscope (SEM). SEM observation revealed that coatings have crack and mosaic structure.

KW - Al O

KW - Electrical insulation and superconducting magnet

KW - Sol-gel

KW - Thermal stress

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Preparation and thermal stress analysis of AI_2o3 insulation coatings on ss-304 tape

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