Heat resistant and oxidation proof materials

Claim 1

AN ELECTRIC HEATING RESISTOR HAVING A SUBSTANTIAL PORTION THEREOF FORMED FROM PARTICLES CONSISTING ESSENTIALLY OF FINELY DIVIDED SILICON CARBIDE AND A FINELY DIVIDED AND EVENLY DISTRIBUTED METAL SILICIDE COMPONENT, THE AMOUNT OF SAID SILICIDE COMPONENT BEING AT LEAST 1% BUT NOT MORE THAN 60% BY VOLUME OF SAID RESISTOR PORTION AND SUFSAID RESISTOR PORTION CONSISTING OF A RIGID SKELETON OF SAID SILICON CARBIDE PARTICLES IN DIRECT CONTACT WITH EACH OTHER AND HAVING VOIDS THEREBETWEEN, SAID VOIDS BEING SUBSTANTIALLY FILLED WITH SAID METAL SILICIDE COMPONENT LEAVING A TOTAL POROSITY BELOW 15% BY VOLUME OF SAID PORTION OF THE HEATING RESISTOR, SAID SILICIDE COMPONENT BEING CONSTITUTED OF AT LEAST ONE SILICIDE OF THE GROUP CONSISTING OF MOSI2 AND MOSI2 IN COMBINATION WITH AT LEAST ONE SILICIDE OF THE GROUP OF ELEMENTS CONSISTING OF W, CR, TA, NB, V, HF, ZR, TI, AL, BE, B, CA AND CE, THE COMPOSITION OF THE SILICIDE COMPONENT BEING 10 TO 70% BY WEIGHT OF SI, 20 TO 80% BY WEIGHT OF MO, W, CR, TA, NB, V, HF, ZR AND TI, AND UP TO 30% BY WEIGHT OF AL, BE, B, CA AND CE, SAID SILICIDE COMPONENT CONTAINING SUFFICIENT MOSI2 SO THAT THE SILICIDE COMPONENT PER SE RESISTS OXIDATION FOR A PROLONGED TIME AT 1550*C., THE SILICON CARBIDE CONTENT OF SAID PORTION OF SAID HEATING RESISTOR BEING AT LEAST 40% AND NOT MORE THAN 99% BY VOLUME OF THE SOLID PART OF SAID PORTION.