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Title:Characterization of Iron-Chromium-Aluminum surface coated Zircaloy-2 under high temperature steam
Author(s):Zhong, Weicheng
Department / Program:Nuclear, Plasma, & Rad Engr
Discipline:Nuclear, Plasma, Radiolgc Engr
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:M.S.
Genre:Thesis
Subject(s):Cladding
FeCrAl
Zircaloy
coating
oxidation
Abstract:Iron-Chromium-Aluminum (FeCrAl) thin films have been deposited on Zircaloy-2 (Zry2) and yttria-stabilized zirconia (YSZ) by magnetron sputtering, and they have been tested with respect to the oxidation weight gain in high temperature steam. In 700C steam environment, the FeCrAl-coated Zry2 samples have significantly reduced the oxidation rate, compared to the uncoated Zry2. Alumina was promoted for FeCrAl with high Al composition, and a parabolic alumina growth rate under 700_C steam exposure was quantified by AES depth profile. Zirconia formation was inhibited by the FeCrAl coating. A thicker film proved to be more protective, and delayed zirconia formation for a longer time. In 1100C steam environment, a complete film loss was observed due to the low eutectic temperature (950C) of the Fe-Zr binary system.
Issue Date:2016-04-29
Type:Thesis
URI:http://hdl.handle.net/2142/90654
Rights Information:Copyright 2016 Weicheng Zhong
Date Available in IDEALS:2016-07-07
Date Deposited:2016-05


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