EUTECTIC POWDERS FOR CERAMICS PRODUCTION AND WELD AND METHOD OF PRODUCING THE SAME

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The sintering of ceramics such as B4C and SiC, etc. generally uses single-phase powders as additives, the present invention uses eutectic powders such as the eutectic powders of TMB2/SiC, TMB2/SiC/B4C, VC/VB2/SiC, TMB2/SiC/MeB6, SiC/MeB6/B4C, C/TMB2/SiC/B4C, and TMB2/SiC/MeB6/B4C as sintering additives of B4C and SiC, etc. ceramics. The powders are the mixture powders obtained from uniformly mixing any components which form eutectic reaction, selected from C, Me, TM, MgO, TMO2, Me2O3, Me4Al2O9, MgAl2O4, MeAlO3, Me3Al5O12, TMN, TMC, TMB2, TMB, MeB6, MeB6, MeN, Al2O3, SiC and B4C, or the mixture powders having eutectic composite microstructure and obtained by high-temperature melting above powders as raw materials, crushing and grinding to granularity of 0.5-50 microns, wherein TM=Sc, Si, Ce, Al, V, Cr, Ti, Zr, W, Mo, Nb, Ta, Hf; Me= Sc, Al, Ca, Cr, Y, La, RE, and RE represents rear earth elements.