| abstract |
The present invention relates to the provision of materials intended for use in an oxidative medium at high temperatures, including the manufacture of high-temperature electric heaters, parts, sensors and tools operating at temperatures of up to 1900 DEG C and higher. On the basis of silicides - solid solutions (Mo,W)5Si3 and (Mo,W)Si2 as well as Novotny phase (Mo,W)5Si3C containing molybdenum and tungsten, a heat-resistant material is proposed, which makes it possible to produce parts fully made therefrom and a broad range of other heat-resistant materials for the provision of protective coatings and soldered joints: "REFSIC" composite materials, carbon, silicon carbide materials, refractory metals and their alloys. Extensive property-varying potentialities by controlling the phase composition, a large diversity of the structural features of single-layered and multilayered protective coatings make it possible to control the heat-resistance, resistance to thermal shocks and resistance to combined thermal deformations of the coating as such and of parts produced by soldering other high-temperature materials with the help of the proposed heat-resistant material. The proposed electric heaters can have working parts and current lead-in wires made from the above-mentioned high-temperature materials, having soldered joints and protective coatings prom the proposed material in different combinations of materials and heater designs. <IMAGE> |