Results 241 to 250 of about 654,760 (291)

Automatic Pole Figure Recorder

Review of Scientific Instruments, 1954
A device has been developed for the direct recording in stereographic projections of pole figure data as they are supplied from a Geiger counter x-ray diffraction apparatus. The specimen is rotated systematically in a suitable goniometer about two axes in synchronism with movements of the chart and printer on the recorder. When the diffracted intensity
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Instrumentation for RHEED Pole Figure

2013
In this chapter, we describe the major reflection high-energy electron diffraction (RHEED) hardware components: a vacuum system, an electron gun, a sample manipulator, a step motor, a phosphor screen, and a charge-coupled device camera. Most molecular beam epitaxy (MBE) laboratories with in situ RHEED characterization capability are equipped with this ...
Gwo-Ching Wang, Toh-Ming Lu
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Automatic Pole Figure Plotter

Review of Scientific Instruments, 1965
A simple recording apparatus has been developed which automatically plots preferred orientation information obtained by x-ray diffraction in pole figure from. It is used with spiral scanning, counter tube, preferred orientation x-ray goniometers. The apparatus consists of an X-Y recorder, a spiral time base signal generator, and an encoder which ...
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Spurious Areas in Pole Figures

Journal of Applied Physics, 1954
Spurious maxima are frequently observed in pole figures determined by x-ray diffraction techniques employing the Geiger-counter spectrogoniometer. Their origin must be fully understood in order to avoid misleading interpretations of the pole-figure data.
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Averaging Techniques and Ultrasonic Pole Figures

1988
There is considerable interest in the evaluation of texture via ultrasonic measurements because of the advantages when compared to evaluation by diffraction techniques. First, ultrasonic measurements are much more rapid and have the potential of being used concurrently while processing.
Smith, J., Li, Y., Thompson, R. Bruce
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Optimization of X-Ray Pole Figure Measurement

Materials Science Forum, 2004
The traditionally applied registration method of the back-reflection pole figure is based on the equiangular measurement lattice. It determines also the equiangular character of presentation of measurement results in form of stereographic projection, termed as the pole figure.
Leszek Tarkowski, L. Laskosz, Jan T. Bonarski   +2 more
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X-ray pole figures for oriented PVC

Polymer, 1999
Abstract X-ray pole figures were obtained for samples of lightly plasticised poly(vinyl chloride) which had been subjected to monoaxial (draw ratio 2) and biaxial (draw ratio 2×2) orientation at 70°C. These pole figures confirmed the presence of crystallite orientation and suggested the presence of two distributions of crystallites, having the a ...
M. Gilbert, D.H. Ross, A. Bowen
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The Validity of the Pole Figure

Journal of Applied Physics, 1945
A [110] pole figure for cold-rolled and annealed silicon steel, constructed from data obtained with an integrating x-ray camera, is compared with a stereographic projection of [110] poles for one hundred individual grains in the same samples. From this comparison, it is concluded that pole figures are accurate enough to determine preferred orientations
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Illustration of Texture with Ultrasonic Pole Figures

1987
Materials are most often used in the form of polycrystalline aggregates. Preferential orientation of the grains or crystallites within such an aggregate is known as “texture”, and almost all methods of fabrication will tend to develop a texture to some degree. To differentiate among textures, it is desirable to describe and quantify them. One technique
Smith, J., Thompson, R. Bruce, Rehbein, David, Nagel, T., Armstrong, P., Eash, D.   +5 more
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Crystallite Orientation Analysis from Incomplete Pole Figures

Advances in X-ray Analysis, 1974
AbstractThe use of incomplete pole figures results in the loss of orthogonality relations among the associated Legendre functions, and necessitates explicitly evaluating integrals of products of these functions. The required indefinite integrals of associated Legendre functions and their products have been evaluated for cubic crystallographic symmetry ...
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