Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Dendritic Growth in $14.6K_2O-85.4SiO_2$ Glass

$14.6K_2O-85.4SiO_2$ 유리에서 Dendrite의 성장

  • 김성식 (한국과학기술원 재료공학과) ;
  • 박현수 (전남대학교 공대무기재료공학과) ;
  • 김종희 (한국과학기술원 재료공학과)
  • Published : 1985.03.01
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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.

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References

  1. Solidification Processing M.C. Flemings
  2. J. Japan Inst. Metals v.33 Dendrite morphology and arm spacing of steels A. Suzuki;Y. Nagaoka
  3. J. Crystal Growth v.29 Dendritic structure in unidirectionally solidified cyclohexanol T. Okamoto;K. Kishitake;I. Bessho
  4. Acta Met. v.13 Transprent compounds that freeze like metals K.A. Jackson;J.D. Hunt
  5. Met. Trans. v.3 no.3 Experimental observations of dendritic growth G.R. Kotler;K.W. Casey;G.S. Cole
  6. Met. Sci. v.13 no.1 Some observations on dendritic morphology and dendrite arm spacings M.A. Taha
  7. Trans. Met. Soc. AIME. v.239 Influence of coarsening on dendrite arm spacing of aluminum-copper alloys T.Z. Kattamic;J.C. Coughm;M.C. Flemings
  8. Kristallografiya v.1 The estimation of the times of transformation of inclusions and dendritic crystals A.A. Chernov
  9. Kristallografiya v.1 The mechanism of the tranfsormation of dendritic crystals M.O. Khya
  10. Scripta Met. v.2 M. Kahlweit
  11. M.S. Thesis Crystallization of K₂O-SiO₂-TiO₂glasses S.S. Kim
  12. J. Non-Crystalline Solids v.23 Diffusion-controlled crystal growth in K₂O-SiO₂ G.W. Scherer;D.R. Uhlnann