Development of high-grade VPS-tungsten coatings on F82H reduced activation steel

Tomonori Tokunaga, Hideo Watanabe, Naoaki Yoshida, Takuya Nagasaka, Ryuta Kasada, Young Ju Lee, Akihiko Kimura, Masayuki Tokitani, Masatoshi Mitsuhara, Tatsuya Hinoki, Hideharu Nakashima, Suguru Masuzaki, Takeshi Takabatake, Nobuyoshi Kuroki, Koichiro Ezato, Satoshi Suzuki, Masato Akiba

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Vacuum plasma sprayed tungsten (VPS-W) coating formed on F82H steel kept at about 873 K in conventional plasma spray conditions has inhomogeneous texture; it is a mixture of disorganized areas composed of large unmelted grains, fine randomly oriented grains and pores, and well-ordered areas composed of columnar grains. Heat load tests indicate that elimination of the disorganized area is necessary to improve the heat load resistance of VPS-W. One can get W coating with a texture of homogeneous columnar crystal grains by eliminating the unmelted large particles. Optimization of the W powder size was also effective to reduce the number of randomly oriented fine grains and pores.

Original languageEnglish
Pages (from-to)S287-S291
JournalJournal of Nuclear Materials
Issue number1-3 SUPPL.1
Publication statusPublished - 2013


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