Oriented nucleation and crystal growth of Sr-fresnoite (Sr2TiSi2O8) in 2SrO·TiO2·2SiO2 glasses with additional SiO2

CrystEngComm ◽  
2018 ◽  
Vol 20 (23) ◽  
pp. 3234-3245 ◽  
Author(s):  
Wolfgang Wisniewski ◽  
Jovana Dimitrijevic ◽  
Christian Rüssel
Keyword(s):  
Phase Separation ◽  
Crystal Growth ◽  
Bulk Nucleation ◽  
Crystallisation Temperature ◽  
Growth Selection ◽  
Temperature Constant ◽  
Nucleation Growth

The oriented nucleation of Sr-fresnoite is barely affected by increasing the amount of SiO2 in glasses of the mol composition 2SrO·TiO2·2SiO2 + xSiO2 (x = 0 to 1.5) while keeping the crystallisation temperature constant. Bulk nucleation, growth selection and phase separation occur in the bulk.

Oriented nucleation and crystal growth of Ge-fresnoite (Ba2TiGe2O8) in 2BaO·TiO2·2GeO2 glasses with additional GeO2

CrystEngComm ◽  
2018 ◽  
Vol 20 (36) ◽  
pp. 5409-5421 ◽  
Author(s):  
Wolfgang Wisniewski ◽  
Jovana Dimitrijevic ◽  
Christian Rüssel
Keyword(s):  
Crystal Growth ◽  
Crystallization Temperature ◽  
Nucleation And Growth ◽  
Bulk Nucleation ◽  
Growth Selection ◽  
Temperature Constant

The oriented nucleation of Ge-fresnoite is clearly affected by increasing the amount of GeO2 in glasses of the mol composition 2BaO·TiO2·2GeO2 + xGeO2 (x = 0.0–1.5) while keeping the crystallization temperature constant. Bulk nucleation and growth selection occur in the bulk.

Phase separation in undercooled molten Pd80Si20: Part I

1999 ◽  
Vol 14 (9) ◽  
pp. 3653-3662 ◽  
Author(s):  
K. L. Lee ◽  
H. W. Kui
Keyword(s):  
Growth Rate ◽  
Phase Separation ◽  
Crystal Growth ◽  
Grain Refinement ◽  
Crystallization Temperature ◽  
Sharp Decrease ◽  
Nucleation And Growth ◽  
Crystal Growth Rate ◽  
Large Undercooling ◽  
Kinetic Crystallization

Three different kinds of morphology are found in undercooled Pd80Si20, and they dominate at different undercooling regimens ΔT, defined as ΔT = T1 – Tk, where T1 is the liquidus of Pd80Si20 and Tk is the kinetic crystallization temperature. In the small undercooling regimen, i.e., for ΔT ≤ 190 K, the microstructures are typically dendritic precipitation with a eutecticlike background. In the intermediate undercooling regimen, i.e., for 190 ≤ ΔT ≤ 220 K, spherical morphologies, which arise from nucleation and growth, are identified. In addition, Pd particles are found throughout an entire undercooled specimen. In the large undercooling regimen, i.e., for ΔT ≥ 220 K, a connected structure composed of two subnetworks is found. A sharp decrease in the dimension of the microstructures occurs from the intermediate to the large undercooling regimen. Although the crystalline phases in the intermediate and the large undercooling regimens are the same, the crystal growth rate is too slow to bring about the occurrence of grain refinement. Combining the morphologies observed in the three undercooling regimens and their crystallization behaviors, we conclude that phase separation takes place in undercooled molten Pd80Si20.

Light Scattering in the Course of a Polymerization-Induced Phase Separation by a Nucleation-Growth Mechanism

1998 ◽  
Vol 31 (23) ◽  
pp. 8173-8182 ◽  
Author(s):  
Guillermo E. Eliçabe ◽  
Hilda A. Larrondo ◽  
Roberto J. J. Williams
Keyword(s):  
Phase Separation ◽  
Light Scattering ◽  
Growth Mechanism ◽  
Polymerization Induced Phase Separation ◽  
Nucleation Growth

Phase separation by coupled single-crystal growth and polycrystalline fingering in Al-Ge: Theory

1988 ◽  
Vol 60 (15) ◽  
pp. 1514-1517 ◽  
Author(s):  
S. Alexander ◽  
R. Bruinsma ◽  
R. Hilfer ◽  
G. Deutscher ◽  
Y. Lereah
Keyword(s):  
Phase Separation ◽  
Crystal Growth ◽  
Single Crystal ◽  
Single Crystal Growth

scholarly journals Simulations of Phase-field Models for Crystal Growth and Phase Separation

2014 ◽  
Vol 7 ◽  
pp. 72-78 ◽  
Author(s):  
Alain Cartalade ◽  
Amina Younsi ◽  
Élise Régnier ◽  
Sophie Schuller
Keyword(s):  
Phase Separation ◽  
Crystal Growth ◽  
Phase Field ◽  
Phase Field Models

Phase-Separation-Induced Crystal Growth for Large-Grained Cu2ZnSn(S,Se)4 Thin Film

2018 ◽  
Vol 10 (41) ◽  
pp. 35069-35078 ◽  
Author(s):  
Lijian Huang ◽  
Song Wei ◽  
Daocheng Pan
Keyword(s):  
Thin Film ◽  
Phase Separation ◽  
Crystal Growth

Two Types of Phase Separation and Crystal Nucleation-Growth Mechanisms for Machinable Glass Ceramic

2007 ◽  
Vol 544-545 ◽  
pp. 929-932
Author(s):  
Xin Pei Ma ◽  
Guang Xin Li ◽  
Jian Feng Yang ◽  
Zhi Hao Jin
Keyword(s):  
Phase Separation ◽  
Fine Particles ◽  
Glass Ceramics ◽  
Nucleation And Growth ◽  
Crystal Nucleation ◽  
Growth Mechanisms ◽  
Phase Precipitation ◽  
Atom Diffusion ◽  
Two Phases ◽  
Nucleation Growth

Machinable mica glass ceramics with more ZnO and B2O3 showed the phase separation by spinodal decomposition. the size of two phases formed by phase separation is in micron meter order. The nucleation and growth of crystal is performed through the diffusion of atoms. Another kind of materials with no ZnO and B2O3 addition behaves different mechanism of phase separation in terms of nucleation and growth. Many fine particles are obtained after the phase separation , the size of which is less than 100nm in diameter. Subsequently nucleation and growth in the crystallization is accomplished by aggregation and unification of the granular phase precipitation. The mechanism of the aggregation and unification nucleation-growth is different from one controlled by atom diffusion in nature. The different mechanisms in crystal nucleation and growth, caused by the composition changing.

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