Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 465, Issue -, Pages 531-539Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2015.06.030
Keywords
Accident tolerance fuel; Fuel cladding; 3D laser coating; High temperature oxidation; Adhesion
Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2012M2A8A5000702]
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A 3D laser coating technology using Cr powder was developed for Zr-based alloys considering parameters such as: the laser beam power, inert gas flow, cooling of Zr-based alloys, and Cr powder control. This technology was then applied to Zr cladding tube samples to study the effect of Cr coating on the high-temperature oxidation of Zr-based alloys in a steam environment of 1200 degrees C for 2000s. It was revealed that the oxide layer thickness formed on the Cr-coated tube surface was about 25-times lower than that formed on a Zircaloy-4 tube surface. In addition, both the ring compression and the tensile tests were performed to evaluate the adhesion properties of the Cr-coated sample. Although some cracks were formed on the Cr-coated layer, the Cr-coated layer had not peeled off after the two tests. (C) 2015 Elsevier B.V. All rights reserved.
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