Изменение поверхности вольфрама при облучении водородной плазмой

Abstract

In this work has been investigated changes of the structure and the erosion of the tungsten surface at the hydrogen plasma irradiation. It was shown that at the irradiation observed changes of the surface as the development of the relief as a result of the nonuniform surface etch. Metallographic analysis showed after irradiation of the tungsten samples at T = 1000 °C and 1500 °C degree of development of the relief lower compared with the sample of tungsten irradiated at T = 700 °C. However, on the samples observed the fine cracks, thus with the growth of temperature the size and cracking to increases. It has been determined after the hydrogen plasma irradiation the surface roughness is changed depending on the irradiation temperature. It is shown that with the growth of the target temperature and the ion energy is increased degree of surface erosion. Noticeable erosion of tungsten due to irradiation of the plasma flow, which simulating of the stationary mode plasma occurs only at relatively high temperatures of the target.