초록 ▼

The process for making a structural element subjected to a high thermal stress and made of a material of high thermal conductivity such as molybdenum, tungsten, copper, aluminum or an alloy of these metals with a protective layer protecting the surface of the structural element comprises treating th

The process for making a structural element subjected to a high thermal stress and made of a material of high thermal conductivity such as molybdenum, tungsten, copper, aluminum or an alloy of these metals with a protective layer protecting the surface of the structural element comprises treating the surface of the structural element to remove surface impurities present and then coating the surface with an amorphous hydrogen containing carbon layer. For reduction, i.e. removal, of the surface impurities the structural element can advantageously be exposed to a hydrogen flow containing hydrogen atoms and/or ions at a temperature of from 100°C. to 600°C. at a pressure of from 10-2 to 102 Pa. The hydrogen atoms and/or the hydrogen ions coming in contact with the surface of the structural element are formed by contact dissociation at at least one hot surface or by glow discharge or by electron cyclotron resonance and the volatile products are pumped away. The layer of amorphous carbon is formed by subsequently directing a hydrocarbon ion stream at the cleaned surface at pressures from 10-2 to 102 Pa.

대표청구항 ▼

In a method for protecting a structural element, subject to a high thermal stress from at least brief exposure to electromagnetic radiation, with a layer covering the surface of said structural element, the improvement wherein said surface of said structural element which is made of a metallic mater

In a method for protecting a structural element, subject to a high thermal stress from at least brief exposure to electromagnetic radiation, with a layer covering the surface of said structural element, the improvement wherein said surface of said structural element which is made of a metallic material of high thermal conductivity and selected from the group which consists of molybdenum, tungsten, copper, aluminum and the alloys CuBe and TiZrMo is treated to remove surface impurities present on said surface and then an amorphous hydrogen-containing carbon layer is applied to coat the treated surface, and thereafter the treated structural element is subjected to said electromagnetic radiation.