| 摘要 |
<p>The present invention pertains to the production of materials used in high-temperature oxidising media, wherein said materials can be used in the production of high-temperature electric heaters as well as in the production of parts, sensors and instruments operating at temperatures of 1900 °C and above. These materials, which essentially contain tungsten and molybdenum silicides MeSi2-Me5Si3 as well as silicon carbide, are characterised in that they exhibit high levels of heat-resistance, of resistance to thermal shocks, of high-temperature strength and of wear resistance. Doping with rhenium, tantalum, titanium, zirconium, niobium and hafnium silicides increases the mechanical properties of these materials. These materials, which have a desired porosity, can be used for increasing the specific electric resistance and for reducing thermal conductivity relative to high-density materials, while having a reduced density.</p> |
