论文部分内容阅读
Tungsten has been decided as the plasma facing material (PFM) for some high heat flux regions of the divertor in the International Thermo-Nuclear Experimental Reactors (ITER),because of tungstens highest melting point of all metals and low vapor pressure,especially,having very low erosion rate and low tritium retention comparing with low Z materials for PFM.But,it is not easy to shape tungsten into the form needed for heavy weight and brittleness of tungsten.Therefore,tungsten coating on copper substrate attracts much attention,for which can provide simultaneously the joining of the W with the heat sink.Plasma spraying is a well-established and widely used process for coating for its economical alternative,high deposition rate and a better chance of in-situ repair after damaging of the coating.Therefore,plasma-sprayed tungsten (PS-W) coatings have been attracting growing attentions for PFM in fusion devices.