TY - JOUR
T1 - Preparation and thermal stress analysis of AI2o3 insulation coatings on ss-304 tape
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
UR - http://www.scopus.com/inward/record.url?scp=68649089207&partnerID=8YFLogxK
U2 - 10.1109/TASC.2009.2018447
DO - 10.1109/TASC.2009.2018447
M3 - Article
AN - SCOPUS:68649089207
SN - 1051-8223
VL - 19
SP - 2375
EP - 2378
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 3
M1 - 5153099
ER -