THE EFFECT OF QUENCHING MEDIA ON THE HEAT-TRANSFER COEFFICIENT OF POLYCRYSTALLINE ALUMINA

Surface heat transfer coefficient values were measured for polycrystal line alumina quenched into water, into oil, and into liquid nitrogen. Since the measurements of the surface heat transfer coefficient h for alumina (and ceramics in general) are very limited, we compare our mea surements with calculations of h for the water quench and with measure ments of h on non-ceramic materials for the oil and liquid nitrogen qu enches.