Some observations on growth and etching of crystals with the diamond or zincblende structure

Billig, F.; Holmes, P.J.

doi:10.1107/s0365110x55001084

Cited by 22 publications

(8 citation statements)

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“…4 does not help in learning the origin of the serrations, but it does help to explain the wide variance of edge structure. These conclusions concerning the evolution of the serrations differ from those of Billig and co-workers (5,(7)(8)(9) who suggested that the serrations were the result of a periodic reversal in growth brought about by the necessity of maintaining a constant mean growth rate and a constant heat loss. The reason why the peaks merge seems to be that minor differences in thermal geometry cause the growth of some to be more rapid than that of others.…”

Section: Discussioncontrasting

confidence: 78%

A Study of Growth Processes in Germanium Dendrites Using Pulse Electroplating Techniques

Smith¹

1961

J. Electrochem. Soc.

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Section: Discussioncontrasting

confidence: 78%

A Study of Growth Processes in Germanium Dendrites Using Pulse Electroplating Techniques

Smith¹

1961

J. Electrochem. Soc.

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“…They explain this by an alternate disappearance and creation of 141° re-entrants, schematically shown in Figure 4.8. TPRE mechanism was shown experimentally for germanium crystals [42,48,49]. Figure 4.4 (c) shows several parallel twin boundaries crossing through the silicon plate and parallel to the outer {111}Si plate bounding planes.…”

Section: Plate-like Structure and Tpre Mechanismmentioning

confidence: 88%

Eutectic Modification of Al-Si casting alloys

Barrirero

2019

Linköping Studies in Science and Technology. Dissertations

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“…The boule center is a complex polycrystalline region with twins and grain boundaries. The growth tip is highly twinned with finer grains that eventually give way to the preferred <110>-<112>-type growth directions observed for this crystal structure [57,60,76]. Within the large single grains having <110>-type growth direction, the number density of Te-particles and the size distributions are nominally constant with little variation from growth tip to growth heel.…”

Section: Position Dependence (Xr) Vs Overall Datamentioning

confidence: 87%

Property Improvement in CZT via Modeling and Processing Innovations . Te-particles in vertical gradient freeze CZT: Size and Spatial Distributions and Constitutional Supercooling

Henager

Alvine

Bliss

et al. 2014

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A section of a vertical gradient freeze CZT boule approximately 2100-mm 3 with a planar area of 300mm 2 was prepared and examined using transmitted IR microscopy at various magnifications to determine the three-dimensional spatial and size distributions of Te-particles over large longitudinal and radial length scales. The boule section was approximately 50-mm wide by 60-mm in length by 7-mm thick and was doubly polished for TIR work. Te-particles were imaged through the thickness using extended focal imaging to locate the particles in thickness planes spaced 15-µm apart and then in plane of the image using xy-coordinates of the particle center of mass so that a true three dimensional particle map was assembled for a 1-mm by 45-mm longitudinal strip and for a 1-mm by 50-mm radial strip. Te-particle density distributions were determined as a function of longitudinal and radial positions in these strips, and treating the particles as vertices of a network created a 3D image of the particle spatial distribution. Teparticles exhibited a multi-modal log-normal size density distribution that indicated a slight preference for increasing size with longitudinal growth time, while showing a pronounced cellular network structure throughout the boule that can be correlated to dislocation network sizes in CZT. Higher magnification images revealed a typical Rayleigh-instability pearl string morphology with large and small satellite droplets. This study includes solidification experiments in small crucibles of 30:70 mixtures of Cd:Te to reduce the melting point below 1273 K (1000˚C). These solidification experiments were performed over a wide range of cooling rates and clearly demonstrated a growth instability with Te-particle capture that is suggested to be responsible for one of the peaks in the size distribution using size discrimination visualization. The results are discussed with regard to a manifold Te-particle genesis history as 1) Teparticle direct capture from melt-solid growth instabilities, 2) Te-particle formation from dislocation core diffusion and the formation and breakup of Te-tubes, and 3) Te-particle formation due to classical nucleation and growth as precipitates. Fourier transform (averaged) of the spatial arrangement of the data. The 1D arrangement of peaks in the Fourier transform indicate a horizontal spacing of approximately 145 microns. Figure 20. An image manipulated to show the large r 3 Te-particles bonded to the nearest r 1 Te-particles using stick bonds out to 250 µm. The closest r 1 to r 3 distance in this volume element is 18 µm.

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Some observations on growth and etching of crystals with the diamond or zincblende structure

Cited by 22 publications

References 0 publications

A Study of Growth Processes in Germanium Dendrites Using Pulse Electroplating Techniques

A Study of Growth Processes in Germanium Dendrites Using Pulse Electroplating Techniques

Eutectic Modification of Al-Si casting alloys

Property Improvement in CZT via Modeling and Processing Innovations . Te-particles in vertical gradient freeze CZT: Size and Spatial Distributions and Constitutional Supercooling

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