American Nuclear Society
Home

Home / Store / Journals / Electronic Articles / Fusion Science and Technology / Volume 61 / Number 3 / Pages 236-239

Thermal Fatigue Tests of Vacuum Plasma-Sprayed Tungsten Tiles for Plasma-Facing Material

F. L. Chong, J. L. Chen, X. B. Zheng

Fusion Science and Technology / Volume 61 / Number 3 / Pages 236-239

April 2012

Format:

Price:$30.00
Member Price:$27.00
Member Savings:$3.00

Tungsten coating as a plasma-facing material on copper alloys is an important issue of a tokamak fusion device. Tungsten tile was created by means of plasma-spraying technology. The properties of the tungsten coating are as follows: low porosity of 4.7%, [approximately]92% of the theoretical tungsten bulk density, and high thermal conductivity of [approximately]79.7 W/mK, which are interesting properties for the plasma-facing material. To alleviate the stress concentration, the tile was designed with rounded edges with a radius of 5 mm. The fatigue performance of the tungsten tile was tested at 5 MW/m2 in an electron beam facility. No damage was observed after 38 cycles at 250 s per cycle. It is concluded that the rounded-edge design is helpful in reducing the maximum stress and in improving the resistant heat load property, which was proved by finite element analysis.

 
 
 
Questions or comments about the site? Contact the ANS Webmaster.
advertisement