Behavior of actively cooled mock-ups with plasma sprayed tungsten coating under high heat flux conditions

K. Tokunaga, Y. Kubota, N. Noda, Y. Imamura, A. Kurumada, N. Yoshida, T. Sogabe, T. Kato, B. Schedler

Research output: Contribution to journalConference articlepeer-review

30 Citations (Scopus)


High density tungsten is coated by vacuum plasma spraying technique (VPS) on tiles, 20 mm × 20 mm × 10 mm. Substrate materials are carbon/carbon composite (CX-2002U), isotropic fine-grained graphite (IG-430U). Thickness of the tungsten-coating layer is 0.5 mm. The tungsten-coated tiles are jointed by Ti brazing on the OFHC surface with a cooling tube. In addition, VPS-W coated TZM also has been brazed. Thermal response and thermal fatigue lifetime tests using an electron beam facility have been carried out on the tungsten coated mock-ups under the active cooling condition. Heat flux is changed from 1 to 10 MW/m2. The heat flux experiments have been carried out under the condition that the water flow velocity, pressure and temperature are 15.0 m/s, 0.5 MPa and 293 K, respectively. The use of high density VPS-W improves the performance of mock-ups under steady state heat flux condition. In addition, in the case of high density W coated CX-2002U on OFHC and W coated TZM on OFHC, it is demonstrated that the mock-up successfully withstood 100 cycles of heat loads at 10 MW/m2 at steady state.

Original languageEnglish
Pages (from-to)133-138
Number of pages6
JournalFusion Engineering and Design
Volume81 A
Issue number1-4
Publication statusPublished - Feb 2006
EventProceedings of the Seventh International Symposium on Fusion Nuclear Technology ISFNT-7 Part A -
Duration: May 22 2005May 27 2005

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • General Materials Science
  • Mechanical Engineering


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