Results 261 to 270 of about 286,218 (312)
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Journal of Materials Science, 1991
A new precipitate phase (designated X phase) other than the S(Al2CuMg) precipitate phase has been discovered in the 2124 aluminium alloy. Using selected-area electron diffraction analysis, dynamical diffraction simulation, energy dispersion analysis of X-rays and high-resolution electron microscopy, it is suggested that the X phase has an orthorhombic ...
Yan Jin, Chunzhi Li, Minggao Yan
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A new precipitate phase (designated X phase) other than the S(Al2CuMg) precipitate phase has been discovered in the 2124 aluminium alloy. Using selected-area electron diffraction analysis, dynamical diffraction simulation, energy dispersion analysis of X-rays and high-resolution electron microscopy, it is suggested that the X phase has an orthorhombic ...
Yan Jin, Chunzhi Li, Minggao Yan
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Alpha phase precipitation in delta phase plutonium
Journal of Nuclear Materials, 1967Abstract An investigation has been made of the effect of cold treatment at −80° C upon the α phase precipitation in a Pu-3 at % Ga alloy cast into moulds held at various temperatures between 70° C and 670° C. The casting conditions produced a cored δ phase structure in which the cold treatment transformed the solutedeficient regions to the α phase ...
R.A. Knight +3 more
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A precipitation phase discriminator for IMPROVER
2021<p>Knowledge of the expected precipitation phase is crucial for mitigating the impacts snow and ice on national infrastructure. This is sensitive to the altitude of the modelled forecast grid point which varies between models.</p><p>The IMPROVER project aims to blend probabilistic model variables from different
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Phase Characterization of Precipitated Zirconia
Journal of the American Ceramic Society, 1994The phase compositions of undoped and europium‐doped zirconia samples, obtained by precipitation and thermal treatment from 350° to 1000°C, have been investigated by powder X‐ray diffractometry, infrared spectroscopy, and cathodoluminescence spectroscopy.
Gutzov, Stoyan +3 more
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Energy & Fuels, 2006
It is shown by sequential reprecipitation that both n-C5 and n-C7 Athabasca asphaltene contain significant amounts of precipitant solubles, comprising resins and low-molecular-weight asphaltene-like substances in about the same percentage amounts relative to the residual precipitated insoluble asphaltene.
Otto P. Strausz +4 more
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It is shown by sequential reprecipitation that both n-C5 and n-C7 Athabasca asphaltene contain significant amounts of precipitant solubles, comprising resins and low-molecular-weight asphaltene-like substances in about the same percentage amounts relative to the residual precipitated insoluble asphaltene.
Otto P. Strausz +4 more
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Coarsening of Second-Phase Precipitates
2023In Chap. 1 we established that a system is unstable thermodynamically until its free energy has reached a minimum. On the other hand, a particle of the second phase has substantial amount of excess free energy associated with its interfacial area, a conclusion which we reached in the Gibbsian theory of capillarity; see Sect. 4.2.1.
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Transactions of the Indian Institute of Metals, 2020
In the current work, a phase field model is used to study the effect of atomic mobility inside the precipitate phase on coarsening behaviour in two-dimensional (2D) systems. In all the coarsening theories until now, the diffusivity inside the precipitate phase has not been explicitly considered which would imply that there is no chemical potential ...
A. Sai Deepak Kumar +3 more
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In the current work, a phase field model is used to study the effect of atomic mobility inside the precipitate phase on coarsening behaviour in two-dimensional (2D) systems. In all the coarsening theories until now, the diffusivity inside the precipitate phase has not been explicitly considered which would imply that there is no chemical potential ...
A. Sai Deepak Kumar +3 more
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Solid‐phase precipitation of CdTe nanoparticles in glass
physica status solidi (b), 2003AbstractGrowth of CdTe nanoparticles in glass is studied through the analysis of optical absorption spectroscopy with the help of a quantized state effective mass model. Glass includes nanoparticles with an initial size of ∼1.6 nm on cooling to room temperature from the melt at ∼1000 °C.
Allahverdi, C, Yukselici, Mehmet Hikmet
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Advances in Materials Technology for Power Plants, 2019
Abstract Alloy 718 is one of the most useful heat-resistant alloys for important device components that require high-temperature properties. In order to obtain excellent mechanical properties, it is necessary to form fine grains, for which the pinning effect of the δ phase can be used in some cases. To precipitate a sufficient amount for
Takuji Otake +2 more
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Abstract Alloy 718 is one of the most useful heat-resistant alloys for important device components that require high-temperature properties. In order to obtain excellent mechanical properties, it is necessary to form fine grains, for which the pinning effect of the δ phase can be used in some cases. To precipitate a sufficient amount for
Takuji Otake +2 more
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Precipitation of Metastable Carbonate Phases from Seawater
Nature, 1970BECAUSE of the widespread occurrence of carbonates in marine sediments there has been a continuing interest in the mineralogy of carbonate phases that can be chemically precipitated from seawater1–9. The discovery of metastable carbonate minerals (aragonite and high-magnesium calcites) of non-skeletal origin occurring as cementing material in submarine
K M, Towe, P G, Malone
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