Microstructure evolution and failure mechanism of Cr-coated Zry-4 in air and steam at 1200 °C

Rong Chen; Qing Li; Huan Chen; Ruiqian Zhang; Taihong Huang; Dehao Kong; Zhennan Yang; Jianrui Wang; Peng Song; Jiansheng Lu

Journal of Materials Research and Technology (May 2024)

Microstructure evolution and failure mechanism of Cr-coated Zry-4 in air and steam at 1200 °C

Rong Chen,
Qing Li,
Huan Chen,
Ruiqian Zhang,
Taihong Huang,
Dehao Kong,
Zhennan Yang,
Jianrui Wang,
Peng Song,
Jiansheng Lu

Affiliations

Rong Chen: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
Qing Li: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China; Corresponding author.
Huan Chen: Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China
Ruiqian Zhang: Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China
Taihong Huang: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
Dehao Kong: Faculty of Civil Aviation and Aeronautics, Kunming University of Science and Technology, Kunming, 650093, China
Zhennan Yang: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
Jianrui Wang: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
Peng Song: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China; Faculty of Civil Aviation and Aeronautics, Kunming University of Science and Technology, Kunming, 650093, China; Corresponding author.
Jiansheng Lu: Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China

Journal volume & issue: Vol. 30
pp. 4412 – 4423

Abstract

Read online

The dense and uniform Cr coating is successfully applied to the Zry-4 (zircaloy-4) substrate using multi-arc ion plating as an accident-tolerant fuel cladding. The isothermal oxidation behavior of the Cr-coated Zry-4 is investigated in air and steam at 1200 °C. The mass gain, microstructure evolution and phase composition of the Cr-coated Zry-4 after different oxidation times are compared. The mass gain of Cr-coated Zry-4 in air is higher than in steam. In air, the dense Cr2O3 layer consisted of bulk Cr2O3, while protruding flake Cr2O3 is found on the surface of the Cr coating in steam. The degradation process and oxidation failure mechanism of the Cr-coated Zry-4 in air and steam at 1200 °C are analyzed.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

About the journal

Abstract

Keywords