Free energy of a second nucleation contrasted with that of Forming a new growth step,it is showed that when carbon\|hydrogen radical concentration is higher,carbon\|hydrogen radical on substrate will heap up, at this time a second nucleation can form.
Rhythmic bunching phenomena of the growth step was observed, its terrace width between the growth steps is approximately 80μm and the growth step height ranges from 20 to 50nm. A micro-spiral that lies on the large terrace was also observed.
The result of this experiment indicates two conclusions,one of which is that concentric annuluses appearing in PHB spherocrystal in orthogonal polarized light are as a result of difference in height of 200nm～500nm between growth steps by reason of step-like or auger-type growing of PHB spherocrystal.
At hight supersaturations the EAFP crystals grow very fast and the density of growth steps is very high. At higher supersaturations the formation and development of 2 - D step dominate the growth of EAFP surface. At lower supersaturations the anisotropic spiral dislocations are major growth on the EAFP crystal surface.
The surface free energy was estimated from the growth step morphology.
Experimentally observed deviations from the classical rate laws of radical polymerization in solution can be treated as solvent interactions concerning the growth step.
Avrami's model of the kinetics of crystallization is the generally accepted starting point for the analysis of nucleation and primary crystallization in the growth step.
A subsequent growth step was employed under conditions that favor a high lateral growth rate in order to promote the coalescence of the initial islands and provide optimal material properties.
The fabrication of such devices avoids the growth of thick layers of quaternary material with a low Ga and As fraction, and simplifies the fabrication to one planar epitaxial growth step and one non-critical conventional etch.
The prediction and observation of growth ledges at various moving interphase boundaries in solid-solid phase transformations has become increasingly widespread since first proposed in the early 1960's by Aaronson.
More complex transformations are employed to examine the possible role of growth ledges to account for microstructure development.
The augite and pigeonite lattices are apparently coherent, and no growth ledges were observed at the interfaces.
Precipitation on growth ledges of planar, low energy interphase boundaries in Fe-C-X alloys
This paper is concerned with a detailed investigation into the formation of particulate precipitates on the mobile growth ledges of low-energy austenite-ferrite boundaries in an Fe-10%Cr-0.2%C alloy.
By observing the deep etched specimens and electrolylic extract powder of the as-cast high speed steels in the scanning electron microscope, it has been found that, the eutectic carbides exhibit a number of forms as the composition of the high speed steel changes, a carbide "wall" existing around the skeleton eutectic and an obvious growth step on a piece of feathery eutectic carbide, the δ-eutectoid carbides exhibiting fibered bunch-like appearance, etc.
The relationship between the dislocations, the inclusions and the growth striations in YAG single crystals were studied with birefringence topography. The experimental evidence shows that the inclusions are adsorped preferentially at the outcrops of dislocations at the solid-liquid interface and the relative sizes of the inelusions correspond to the heights of growth-steps which are related to the normal components of Burgers vectors of dislocations.
By observing the deep etched specimens and electrolylic extract powder of the asteast high speed steels in the scanning electron microscope,it has been found that, the euteetic carbides exhibit a number of forms as the composition of the high sped steel changes,a carbide“wall”existing around the skeleton eutectic and an obvious growth stepon a piece of feathery eutcetic earbide,the δ—eutectoid carbides exhibiting fibered bunch-like appearance,etc.