Recent progress of tungsten R&D for fusion application in Japan

Y. Ueda, H. T. Lee, N. Ohno, S. Kajita, A. Kimura, R. Kasada, T. Nagasaka, Y. Hatano, A. Hasegawa, H. Kurishita, Y. Oya

Research output: Contribution to journalConference article

32 Citations (Scopus)

Abstract

The status of ongoing research projects of tungsten R&D in Japan is summarized in this paper. For tungsten material development, a new improved fabrication technique, the so-called superplasticity-based microstructural modification, is described. This technique successfully improved fracture strength and ductility at room temperature. Recent results on vacuum plasma spray W coating and W brazing on ferritic steels and vanadium alloys are explained. Feasibility of these techniques for the manufacture of the blanket is successfully demonstrated. The latest findings on the effect of neutron damage in tungsten on T retention and on the change in mechanical and electrical properties are described. Retention characteristics for neutron-damaged W were different compared to those for ion-damaged W. Upon neutron irradiation, tungsten alloys containing transmutation elements of W (Re and Os) show changes in properties that are different compared with those shown by pure W. The effects of mixed plasma exposure (D/He/C) are described. Both D/He and D/C mixed ion irradiations significantly affect ion-driven permeation in W. He bubble dynamics play a key role in nano-structure formation on the W surface.

Original languageEnglish
Article number014029
JournalPhysica Scripta T
VolumeT145
DOIs
Publication statusPublished - 2011 Dec 1
Event13th International Workshop on Plasma-Facing Materials and Components for Fusion Applications, PFMC-13 and 1st International Conference on Fusion Energy Materials Science, FEMaS-1 - Rosenheim, Germany
Duration: 2011 May 92011 May 13

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Mathematical Physics
  • Condensed Matter Physics

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    Ueda, Y., Lee, H. T., Ohno, N., Kajita, S., Kimura, A., Kasada, R., Nagasaka, T., Hatano, Y., Hasegawa, A., Kurishita, H., & Oya, Y. (2011). Recent progress of tungsten R&D for fusion application in Japan. Physica Scripta T, T145, [014029]. https://doi.org/10.1088/0031-8949/2011/T145/014029