Results 211 to 220 of about 26,124 (259)
Some of the next articles are maybe not open access.
On the heterogeneous nucleation of martensite
Materials Science and Engineering: B, 1995Martensitic nucleation near inhomogeneities is modeled using linear elasticity. The coherent strain energy due to the formation of a martensite embryo decreases when the inhomogeneity is elastically stiffer than the matrix and vice versa. A maximum reduction of 20% in strain energy is calculated for the case when the embryo is formed near a free ...
H.Y. Yu, S.C. Sanday, B.B. Rath
openaire +1 more source
Kinetics of Heterogeneous Nucleation
The Journal of Chemical Physics, 1950Consider a phase transition α⇄β. Stable β-embryos can be retained in the temperature range of α-stability in cavities of suitable extraneous solids present in the system. Retained β-embryos may nucleate the α→β-transformation in the range of β-stability. Using these concepts a theory for the effect of thermal history upon the kinetics of
openaire +1 more source
Heterogeneous Nucleation of Nitrogen
2007Homogeneous and heterogeneous vapor–liquid nucleation experiments of nitrogen are carried out using a cryogenic nucleation pulse chamber. For the latter water ice crystals are used as heterogeneous seeds. The onset of nucleation is detected by constant angle Mie scattering at pressures from 2 to 25 kPa and temperatures from 50 to 70 K.
Guram Chkonia +3 more
openaire +1 more source
Heterogeneous nucleation and adsorption
Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 2003This paper discusses the heterogeneous nucleation of solidification, treating the fundamental process as taking place by adsorption on the surface of the heterogeneous nucleant. A theoretical framework for adsorption and nucleation catalysis is described, and some related experimental results are discussed.
openaire +1 more source
Heterogeneous nucleation of Mg–Al alloys
Scripta Materialia, 2006Grain size is one of the most important microstructural characteristics determining the mechanical properties and therefore the service performance of polycrystalline materials. Heterogeneous nucleation involves the addition or in situ formation of potent nuclei in the system to promote nucleation events, leading to a fine grain structure.
Lu, L., Dahle, A. K., St John, D. H.
openaire +3 more sources
Heterogeneous and homogeneous nucleation of strontium sulphate
Talanta, 1966Heterogeneous and homogeneous nucleation processes of strontium sulphate have been studied, using a homogeneous precipitation technique together with electronic particle counting. Four different heterogeneous nucleation processes were observed in solutions purified by conventional filtration.
D H, Klein, J A, Driy
openaire +2 more sources
Generalized Gibbs’ approach in heterogeneous nucleation
The Journal of Chemical Physics, 2013Heterogeneous nucleation (condensation and boiling) on planar solid surfaces is described taking into account changes of the state parameters of the critical clusters in dependence on supersaturation. The account of the variation of the state parameters of the cluster phase on nucleation is performed in the framework of the generalized Gibbs’ approach.
Alexander S, Abyzov +1 more
openaire +2 more sources
Heterogeneous nucleation on a substrate
Bulletin de la Société française de Minéralogie et de Cristallographie, 1969Nucleation theory in the case of condensation on a substrate is reviewed. The thermodynamics of adsorbed layer formation is briefly discussed. It was shown that three distinctly different condensation regions exist : a) that of medium supersaturation and an adsorbed layer which is less than a monolayer, b) very high supersaturation and an ...
openaire +2 more sources
Surface area controlled heterogeneous nucleation
The Journal of Chemical Physics, 2012Heterogeneous nucleation of liquid from a gas phase on nanoparticles has been studied under various saturation ratios and nuclei size. The probability of liquid droplet nucleation, especially at a low degree of deviation from equilibrium, was measured for both atmospheric aerosol particles and engineered nanoparticles Cr2O3.
Brian, Steer +3 more
openaire +2 more sources
Nanoscale-Agglomerate-Mediated Heterogeneous Nucleation
Nano Letters, 2017Water vapor condensation on hydrophobic surfaces has received much attention due to its ability to rapidly shed water droplets and enhance heat transfer, anti-icing, water harvesting, energy harvesting, and self-cleaning performance. However, the mechanism of heterogeneous nucleation on hydrophobic surfaces remains poorly understood and is attributed ...
Hyeongyun Cha +5 more
openaire +2 more sources