Dendritic Growth in <TEX>$14.6K_2O-85.4SiO_2$</TEX> Glass

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J. Korean Ceram. Soc. > Volume 22(3); 1985 > Article

Journal of the Korean Ceramic Society 1985;22(3): 41.

$14.6K_2O-85.4SiO_2$ 유리에서 Dendrite의 성장

김성식, 박현수¹, 김종희

한국과학기술원 재료공학과
¹전남대학교 공대무기재료공학과

Dendritic Growth in $14.6K_2O-85.4SiO_2$ Glass

ABSTRACT

An experimental study has been carried out to investigate the effect of growth rate V and time on secondary dendrite arm spacing of cristobalite dendrites in $14.6K_2O-85.4SiO_2$ glass by means of x-ray diffractormetry optical microscopy and scanning electron microscopy The scanning lectron microscopy reveals a two-phase layer of dendritic crystals and interstitial melt which grow from the surface at a constant rate. Based on this experiment secondary arm spacing is proportional to V-0.24 and dendrite coarsening during isothermal holding shows that the secondary arm spacing increases with increasing heat-treatment time.