Chromium coatings deposited by cooled and hot target magnetron sputtering for accident tolerant nuclear fuel claddings

Research output: Contribution to journalArticle

Abstract

The paper describes the oxidation of E110 alloy with Cr coatings in air atmosphere at 1100 °C for 20 min. The coatings were deposited using magnetron sputtering systems of the classical construction (with cooled targets in a dual configuration) and with a single hot target. The influence of magnetron type on energetic characteristics of the deposition and coating growth was described. The as-deposited and oxidized samples were analyzed by X-ray diffraction, scanning electron microscopy and glow discharge optical emission spectroscopy. The oxidation resistance of the Cr-coated alloy is strongly affected by microstructure and thickness of the deposited films. The Cr coatings obtained by hot target sputtering had a columnar microstructure, the mass gain of these samples was decreased from 9.18 to 3.22 mg/cm2 with coating thickness from 1.8 to 4.5 μm. The minimal mass gain (2.86 mg/cm2) and the best protective properties were belong to the Cr coating with a dense microstructure and thickness of 3.1 μm that was deposited by dual magnetron sputtering. The adhesion behavior of Cr-coated Zr alloy strongly depends on oxidation states of Cr coating and Zr substrate as well as interface reactions.

Original languageEnglish
Article number125618
JournalSurface and Coatings Technology
Volume389
DOIs
Publication statusPublished - 15 May 2020

    Fingerprint

Keywords

  • Chromium coatings
  • High-temperature oxidation
  • Hot target
  • Magnetron sputtering
  • Nuclear fuel claddings
  • Zirconium alloys

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this