Removal of binder from silicon nitride specimens

Conclusions A study was made of the effects of temperature and holding time upon the process of binder removal from silicon nitride specimens prepared by the thermoplastic slip-casting technique. It was established that, to obtain high-quality blanks, treatment should be performed under isothermal conditions at a temperature of 80–100°C, which ensures that a large proportion of the binder used is removed through the liquid phase. In the manufacture of parts calling for close size limits, it is necessary to allow for the appreciable shrinkage exhibited by castings during the binder removal operation.Translated from Poroshkovaya Metallurgiya, No. 7 (151), pp. 99–101, July, 1975.