Erosion and modifications of tungsten-coated carbon and copper under high heat flux

Xiang Liu, S. Tamura, Kazutoshi Tokunaga, N. Yoshida, Fu Zhang, Zeng Yu Xu, Chang Chun Ge, N. Noda

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Tungsten-coated carbon and copper was prepared by vacuum plasma spraying (VPS) and inert gas plasma spraying (IPS), respectively. W/CFC (Tungsten/Carbon Fiber-Enhanced material) coating has a diffusion barrier that consists of W and Re multi-layers pre-deposited by physical vapor deposition on carbon fiber-enhanced materials, while W/Cu coating has a graded transition interface. Different grain growth processes of tungsten coatings under stable and transient heat loads were observed, their experimental results indicated that the recrystallizing temperature of VPS-W coating was about 1400 °C and a recrystallized columnar layer of about 30 μm thickness was formed by cyclic heat loads of 4 ms pulse duration. Erosion and modifications of W/CFC and W/Cu coatings under high heat load, such as microstructure changes of interface, surface plastic deformations and cracks, were investigated, and the erosion mechanism (erosion products) of these two kinds of tungsten coatings under high heat flux was also studied.

Original languageEnglish
Pages (from-to)1887-1894
Number of pages8
JournalPlasma Science and Technology
Volume5
Issue number4
DOIs
Publication statusPublished - Dec 1 2003

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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