Thin polycrystalline diamond films protecting zirconium alloys surfaces: from technology to layer analysis and application in nuclear facilities

0454671 - FZÚ 2016 RIV NL eng J - Journal Article
Ashcheulov, Petr - Škoda, R. - Škarohlíd, J. - Taylor, Andrew - Fekete, Ladislav - Fendrych, František - Vega, R. - Shao, L. - Kalvoda, L. - Vratislav, S. - Cháb, Vladimír - Horáková, K. - Kůsová, Kateřina - Klimša, Ladislav - Kopeček, Jaromír - Sajdl, P. - Macák, J. - Johnson, S. - Kratochvílová, Irena
Thin polycrystalline diamond films protecting zirconium alloys surfaces: from technology to layer analysis and application in nuclear facilities.
Applied Surface Science. Roč. 359, Dec (2015), s. 621-628. ISSN 0169-4332. E-ISSN 1873-5584
R&D Projects: GA ČR(CZ) GA15-05095S; GA TA ČR TA04020156; GA MŠMT LO1409; GA MŠMT(CZ) LM2011029
Grant - others:SAFMAT(XE) CZ.2.16/3.1.00/22132
Institutional support: RVO:68378271
Keywords : metal coatings * thin polycrystalline diamond film * impedance spectroscopy * Raman spectroscopy * XPS
Subject RIV: JI - Composite Materials
Impact factor: 3.150, year: 2015

Zirconium alloys can be effectively protected against corrosion by polycrystalline diamond (PCD) layers grown in microwave plasma enhanced linear antenna chemical vapor deposition apparatus. Standard and hot steam oxidized PCD layers grown on Zircaloy2 surfaces were examined and the specific impact of polycrystalline Zr substrate surface on PCD layer properties was investigated. It was found that the presence of the PCD coating blocks hydrogen diffusion into the Zircaloy2 surface and protects Zircaloy2 material from degradation. PCD anticorrosion protection of Zircaloy2 can significantly prolong life of Zircaloy2 material in nuclear reactors even at temperatures above Zr phase transition temperatures.
Permanent Link: http://hdl.handle.net/11104/0255329