High temperature materials problems in fusion reactors

The high-temperature materials problems in fusion reactors are considered, in particular the influence of radiations or materials properties. The primary effects induced by neutron and ion bombardment or high temperature structural materials (displacement damage, nuclear transmutation reactions, surface reactions) are examined. The radiation effects and their influence on the physical and mechanical properties of the materials, the surface erosion effects and neutron-induced activity are studied. The corrosion resistance of structure materials is strongly affected by impurities as hydrogen, oxygen and carbon. These impurities originate from the plasma, the nuclear reactions and outside sources. The corrosion of materials in liquid helium, in lithium containing fluoride salts and in helium is also investigated