The effect of supplementary process on grain size of boron carbide

In this paper, the effect of a supplementary process on the grain size of B۴C ceramic along with boronoxide and carbon impurities at various temperatures by pressureless sintering has been investigated. First, thesamples were subjected to uniaxial pressure and then were sintered by pressureless sintering method at ۲۱۰۰,۲۱۷۵, and ۲۲۵۰ °C. After that, the average grain size of the samples was calculated. The results of the samplesshowed that the supplementary washing process for removing boron oxide resulted in improved sinterabilityand reduced boron carbide grain size. Also, the presence of carbon in the primary powder increased sinterabilityand prevented the growth of the boron carbide grain.

کلیدواژه ها:

Boron Carbide ، Pressurless Sintering ، Boron Oxide ، Carbon ، Average Grain Size