焼結・粒成長する多孔体組織における相連続性の計算機モデリング

概要

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A Monte Carlo simulation method using a three dimensional lattice was developed to analyze the connectivity of pores in sintered materials. The changes in porosity (f_V), mean orain diameter (D_S), intercept length of pores (D_V), contiguity of the solid phase (C) and fraction of connected pores (f_<V,C>) with the number of Monte Carlo steps (MCS) were analyzed as a function of initial porosity (f_<V,0>) and initial grain diameter (D_<S,0>). In many cases, f_<V,C> decreased with MCS down to 0%, particularly at small and intermediate values of f_<V,0> and D_<S,0>. However, in some cases of large f_<V,0> and D_<S,0> an f_<V,C> of 100% was maintained irrespective of MCS, which means that all pores may remain connected in the material. Systematic plots of D_V, D_S and C_<VS> f_<V,0> × f_<V,C>, which indicate the amount (%) of connected pores, arc found to be useful for designing sintering and grain growth processes of porous materials.
社団法人日本セラミックス協会の論文
2003-03-01