Characterization of Iron-Chromium-Aluminum surface coated Zircaloy-2 under high temperature steam

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.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Nuclear, Plasma, Radiolgc Engr

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2016

Author dc:creator

• Zhong, Weicheng

Contributors dc:contributor

• Heuser, Brent J.

• Cladding
• FeCrAl
• Zircaloy
• coating
• oxidation

Statement dc:rights

• Copyright 2016 Weicheng Zhong

Language dc:language

en

Handle dc:identifier

http://hdl.handle.net/2142/90654

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/90654