Oxidation kinetics of Cr-coated zirconium alloy: Effect of coating thickness and microstructure; Corrosion Science; Vol. 175

Oxidation kinetics of Cr-coated zirconium alloy: Effect of coating thickness and microstructure; Corrosion Science; Vol. 175

Detalhes bibliográficos
Parent link:	Corrosion Science Vol. 175.— 2020.— [108883, 9 p.]
Autor Corporativo:	Национальный исследовательский Томский политехнический университет Инженерная школа ядерных технологий Отделение экспериментальной физики
Outros Autores:	Kashkarov E. B. Egor Borisovich, Sidelev D. V. Dmitry Vladimirovich, Syrtanov M. S. Maksim Sergeevich, Tang Chong, Steinbrueck M. Martin
Resumo:	Title screen Cr coatings with the thickness of 4.5–9.0??m and dense/columnar microstructure were deposited onto Zr alloy by cooled or hot target magnetron sputtering. Steam oxidation tests were performed under temperature ramp from 500 to 1200?°C and isothermal treatment at 900?1200?°C for 10?30?min. The measurements of mass gain showed different oxidation kinetics depending on microstructure and thickness of the as-deposited Cr coatings. The dense microstructure is favorable to prevent alloy oxidation as long as the Cr layer is intact. The higher activation energy of 202?kJ/mol is observed for the dense 4.5??m-thick Cr coating while thicker columnar coatings have 177?183?kJ/mol. The time of transition from protective to non-protective behavior increases with coating thickness. It was shown that the 9??m-thick Cr coating with columnar microstructure better protects the zirconium alloy from oxidation at 1200?°C for 10?min in comparison with thinner coatings. The fast inter-diffusion of Cr and Zr at coating/alloy interface significantly affects the oxidation kinetics of Cr-coated zirconium alloy at temperatures above 1100?°C and long oxidation time. Режим доступа: по договору с организацией-держателем ресурса
Idioma:	inglês
Publicado em:	2020
Assuntos:	электронный ресурс труды учёных ТПУ LOCA steam oxidation chromium coatings zirconium alloys magnetron sputtering microstructure hot target sputtering окисление хромовые покрытия циркониевые сплавы магнетронное распыление
Acesso em linha:	https://doi.org/10.1016/j.corsci.2020.108883
Formato:	MixedMaterials Recurso Electrónico Capítulo de Livro
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663472

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