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Showing 1 to 13 of 13 for “"High Temperature X-ray Diffraction"”.
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Determination of the CTE tensor of materials from high temperature X-ray diffraction
… well for approximating thermal expansion in high-symmetry crystals, but for low-symmetry crystals (monoclinic, triclinic), anisotropy in a system shows a deviation from averages. The Coefficient of Thermal Expansion Analysis Suite (CTEAS) has been developed to calculate and visualize thermal …
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Experimental Determination of Smectite Hydration States Under Simulated Diagenetic Conditions (high-Temperature, X-Ray Diffraction, Dehydration)
… contact with saline solutions were determined at temperatures and hydraulic pressures that simulate burial diagenetic environments. A high-pressure high-temperature X-ray cell, mounted on an automated General Electric XRD3 X-ray diffractometer, was used to monitor the basal reflections.
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Reactions in the system MgO-Al2O3-Si02 as examined by continuous high-temperature x-ray diffraction
Made available in DSpace on 2014-12-04T19:14:04Z (GMT). No. of bitstreams: 1 6104299.pdf: 2565544 bytes, checksum: f577bec4bf4bcf65086284d6db429e81 (MD5) Previous issue date: 1961
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Volume Changes Accompanying the Melt-Crystal Transition in Binary Borate Melts
… the crystal growth range. The elevated temperature specific volumes of the crystals were calculated using x-ray unit cell densities and volume thermal expansion coefficients obtained by high-temperature x-ray diffraction analysis. Melt specific volumes had been previously determined.
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Thermal expansion behavior of Mo-Si-B system intermetallics
… oxidizing and aggressive environments at temperatures above 1000 0C. Mo-Si-B system intermetallics have been attracting attention as promising candidate materials for such applications, especially materials containing Mo5Si3 (T1) phase. However, Mo5Si3 single crystal has significant …
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High Temperature X-Ray Decomposition Studies of Alpha Phase Nickel-Silicon and Beta Phase Copper-Aluminum-Nickel Alloys
In-situ high temperature X-ray diffraction studies have been performed in order to study the transformation mechanisms and associated kinetics regarding the decomposition and precipitation processes of two metallic alloys of commercial significance: Ni-12.5 at% Si and Cu-28.15 at% Al-3.88 at% Ni. …
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Thermal expansion and thermal conductivity of (Ca<sub>1-x</sub>,Mg<sub>x</sub>)Zr₄(PO₄)₆ where x = 0.0-0.4
… rod dilatometer and axial thermal expansion by high temperature X-ray diffraction and least squares refinement. Thermal diffusivity was determined with the laser flash method and specific heat by differential scanning calorimetry. Thermal conductivity was found by the product of the thermal …
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Phase equilibria, thermal expansion and symmetry relations within the HfO2-Ta2O5-TiO2-temperature system
… approach to the rapid production of the high temperature HfO2-Ta2O5-TiO2 phase diagrams is presented that highlights the combined use of: (i) in-situ high temperature X-ray diffraction (up to 3000 ˚C), (ii) Thermal expansion measurements (iii) extraction of atomic motifs with associated …
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Structural variations of feldspars at high pressure and high temperature
… behavior of feldspars as a function of pressure, temperature and composition. In this thesis, high-pressure and high-temperature X-ray diffraction data were collected for feldspars over a range of compositions which has led to the development a structural model that allows one to predict the …
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The high temperature structural evolution of hafnia
… the phase transformations in HfO2 occur at higher temperatures. Even though this phase transformation has been extensively studied in ZrO2 , the respective transformation in HfO2 is relatively unstudied and the properties that are reported are inconsistent. Much of the difficulty associated …
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Preparation and characterisation of double doped-CeO₂ systems
… and a variant of the Pechini method. X-ray diffraction of the oxide powders indicates that they are single-phase cubic fluorite materials. High temperature x-ray diffraction studies show that there is no evolution of secondary phases up to the maximum temperature of testing, 1273 K. …
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Thermal expansion and phase transformation behavior in the rare-earth titanate system
… towards the central Ti cation with increasing temperature. This information was paired with insights into the volume expansion, structural elements, and geometric units between the orthorhombic and hexagonal phases to describe a potential pathway between two crystallographic cells which have no …
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Materials development for multicomponent systems with variable oxidation states
… calcination/crystallization atmosphere and temperature, were investigated. Additionally, the electrochemical performance of the LiMn2O4 (LMO4) composition was evaluated and compared against commercial LiMn2O4 powders. Moreover, for powders in the M1Ti2(PO3)4 (M1= Li, Na, K,) family, their …