摘要
By the method of TG-DSC(thermo gravimetric analysis -differential scanning calorimeter) , the chemical reactions of Fe-Si3 N4 bonded SiC during the sintering process in nitriding furnace have been studied. Analyses have been conducted on the reason of disintegration of specimens when ferro-silicon was added greater than 15% and on the method to reduce damage. The result indicated that there are mainly three important reactions occurred during the nitriding process of samples, they are: the oxidation of carbon, the melting of ferro-silicon and the nitriding of ferro -silicon. Controlling the balance of partial pressure of N2 and slowing down the rate of temperature rising can reduce the disintegration of samples .
By the method of TG-DSC(thermo gravimetric analysis -differential scanning calorimeter) , the chemical reactions of Fe-Si3 N4 bonded SiC during the sintering process in nitriding furnace have been studied. Analyses have been conducted on the reason of disintegration of specimens when ferro-silicon was added greater than 15% and on the method to reduce damage. The result indicated that there are mainly three important reactions occurred during the nitriding process of samples, they are: the oxidation of carbon, the melting of ferro-silicon and the nitriding of ferro -silicon. Controlling the balance of partial pressure of N2 and slowing down the rate of temperature rising can reduce the disintegration of samples .
