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X-ray diffraction phase analysis of the crystalline phase of polytetrafluoroethylene
Crystallography Reports, 2010Samples of ultradispersed polytetrafluoroethylene, which were prepared with the use of different technological approaches, were studied by X-ray diffraction. The samples were found to belong to the monoclinic system. For some samples, basal reflections, which can be related to paraffins, were found for the first time. This indicates that polymer chains
Yu. A. Lebedev +4 more
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Computer-Aided Qualitative X-Ray Powder Diffraction Phase Analysis
Advances in X-ray Analysis, 1982AbstractThis paper describes a set of interactive computer programs written in FORTRAN IV and implemented on a POP 11/34 equipped with RLO-2 ten Mbyte discs and an RSX-11M operating system to assist in x-ray diffraction phase analysis. The packing of the data base will be described along with the various interactive programs that access it.
Raymond P. Goehner, Mary F. Garbauskas
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Quantitative Phase Analysis in Titanium by X-Ray Diffraction
Advances in X-ray Analysis, 1957AbstractIn view of present difficulties encountered in met alio graphic methods of phase analysis of titanium and its alloys, the possibility of utilizing integrated X-ray intensities for phase analysis was investigated. Power Formula variables were calculated for titanium, and relative areas of three alpha and one beta peak were determined. Recorded X-
Ralph H. Hiltz, Stanley L. Lopata
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Standardless Quantitative X-Ray Phase Analysis – Estimation of Precision
Powder Diffraction, 1989AbstractQuantitative phase analysis of n-phase mixtures can be performed if at least n samples composed of no more than n identical phases are available. The fact that there is no need for pure phases (analytical standards) constitutes the main advantage of the method presented here.
L.S. Zevin, Sh.L. Zevin
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High-temperature X-ray diffraction phase analysis of YNi2B2C
Physica C: Superconductivity, 1996Abstract High-temperature X-ray diffraction of polycrystalline YNi 2 B 2 C has been used to determine the thermal-expansion coefficients of YNi 2 B 2 C and its decomposition temperature for temperature sweeps from room temperature up to 1200°C. The lattice parameters a and c exhibit a thermal expansivity of different magnitude and thus indicate ...
M. Buchgeister, W. Pitschke
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Qualitative Phase Analysis Using an X-Ray Powder Diffractometer
Advances in X-ray Analysis, 1980During the past three years we have undertaken the development of a complete X-Ray Powder Diffraction, facility with the goal of fully integrating experimental and analytical procedures. Such an approach potentially offers substantially improved performance over previously existing systems by virtue of its internal self-consistency and it opens the ...
W. N. Schreiner +2 more
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Mössbauer and X-ray phase analysis of carburized steel
Hyperfine Interactions, 199457Fe backscattering Mossbauer phase analysis of the ASTM A295-70 type chromium bearing steel gas was performed for samples with varying phase composition achieved by gas carburization up to 3 wt% C followed by standard hardening, i.e. austenitizing and quenching procedures.
T. Zemčík +3 more
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Variation of the X-ray quantitative phase analysis method
Inorganic Materials, 2009A method to determine the composition of the phase coequilibrium with one of the components in the system under study is proposed. It is based on the use of diffraction pattern data for test samples whose representative points are located at different sides of the point of the phase in question.
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Theoretical analysis of x-ray CT phase-contrast imaging
SPIE Proceedings, 2008Recently phase contrast imaging has attracted much attention. An obvious advantage of using X-rays for imaging the internal structure of relatively thick samples lies in its high degree of penetration of solid objects. However, often leads to poor image contrast for soft tissue.
Sheng Feng, Song Liu, Xuelong Zhang
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Methods of mixing in quantitative X-ray phase analysis
Journal of Applied Crystallography, 1979The mass absorption factor μ*0j of an unknown sample can be determined by mixing of the sample with a substance for which the mass absorption coefficient μ*0K is known, and then measuring the intensity of the analytical lines of the mixture and the sample.
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