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Showing 1 to 20 of 446 for “"precipitate"”.
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Novel precipitate structures in alloys under irradiation
We investigate the fundamentals of precipitate stability under energetic particle irradiation, towards the goal of better controlling the microstructures of driven alloys. First we focus on an irradiation-induced precipitatewithin- precipitate structure, which is referred to as “cherry-pit” …
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The potential for superlattice precipitate reinforcement in titanium-iron alloys
… the concept of alloys featuring ordered B2 precipitates within a BCC matrix offers a promising possibility due to the potential synergistic benefits of a matrix with superlattice precipitates. The titanium-iron system is selected for this purpose, particularly as both are abundant elements, …
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Oxygen precipitate studies in silicon for gettering in solar cell applications
Oxygen precipitates in silicon can be used (in a process called internal gettering) as sites of heterogeneous nucleation of precipitates of iron and other transition metal that are harmful to solar cell device operation. Oxygen precipitate densities in p- (10¹⁴ boron atoms/cm³) wafers were …
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The role of interfacial structure in the evolution of precipitate morphology
Three aspects of precipitate growth by a ledge mechanism in a Ni-45wt%Cr alloy were investigated. The strain energy for ledge formation and ledge growth kinetics and the emission of structural defects were studied experimentally during the growth of bcc laths from an fcc matrix. The elastic strain …
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Structure and precipitate morphology relationships in a 68Cr-32Ni binary system
Causes for the differences in precipitation morphology observed and investigation.
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Ion-precipitate flotation removal of cyanide complexes in steel plant waste waters, The
Includes bibliographical references.
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An Investigation of the Vacancy Annealing Kinetics and Precipitate Structure in Quenched Gold
Made available in DSpace on 2014-12-10T17:57:43Z (GMT). No. of bitstreams: 1 6511870.pdf: 2419480 bytes, checksum: f4b610fd7ffaf9e405942567edeeabb6 (MD5) Previous issue date: 1965
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The role of defects during precipitate growth in a Ni-45wt% Cr alloy
… between an fcc matrix and a lath-shaped bcc precipitate in Ni-45 wt% Cr were investigated. The interfacial structure on the side facet of the precipitate consists of regular structural ledges and misfit dislocations. No regular defect structure can be found on the habit plane, or broad face, …
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Polycrystal Modeling of Precipitate Effects on the Mechanical Behavior of an Aluminum -Copper Alloy
… aging conditions and the correct trends due to precipitate-induced anisotropy were predicted.
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Interfacial structure of delta phase in Inconel 718 and the selection of precipitate habit planes
… between a γ (fcc) matrix and plate-shaped precipitates of the δ (orthorhombic) phase in Inconel 718. Based upon transmission electron microscopy (TEM) observations, the average habit plane was confirmed to be (111)<sub>γ</sub> which is consistent with previous reports. A parallel array of …
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Phase field model for precipitates in crystals
Oxygen precipitate caused by oxygen supersaturation is the most common and important defects in Czochralski (CZ) silicon. The presence of oxygen precipitate in silicon wafer has both harmful and beneficial effects on the microelectronic device production. Oxygen precipitates are useful for …
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Kinetics of carbide dissolution in chromium + molybdenum steels during oxidation
… 8500C to study their oxidation resistance and a precipitate-free zone formation. Alloy design was carried out using a thermodynamic software Thermo-Calc. Carbides in these alloys were expected to dissolve during oxidation, releasing chromium required for the protective oxide formation. …
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The Effects on Gluten Strength and Bread Volume of Adding Soybean Peroxidase Enzyme to Wheat Flour
… of yeast bread. A pH 4.8 isoelectrically precipitated fraction from soybeans was used because it produced the most precipitate and had about the same peroxidase activity as the other fractions. Gluten strength was determined using a farinograph for seven treatment groups: control …
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Pore-scale characterization of transverse mixing-induced calcium carbonate precipitation of relevance to geological carbon sequestration
… the reaction between carbonate and calcium to precipitate calcium carbonate in an experimental model. This model is a small micro-fluidic device that incorporates a flow channel with an imprinted homogeneous pore structure to replicate the porous nature of groundwater flow. Sodium carbonate and …
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Addition of Soybean Lipoxygenase to All-Purpose Flour and its Effects on Dough Gluten Strength and Bread Quality
… the use of isoelectric precipitation. The pH 4.8 precipitate was found to yield the greatest LOX activity when compared with other fractions (p<0.05). The addition of pH 4.8 precipitate improved rheological properties of bread dough, examined in a farinograph, when compared to the all-purpose …
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Aromatization of light olefins and paraffins on pure and hybrid ZSM-5 catalysts
… in a bench scale propane steam-cracker, ZnO precipitate in the amount of 5wt.-% or ZnO/Al$\sb2$O$\sb3$ co-precipitate in the amounts of 5-20wt.-%, provided optimum catalytic activity. Furthermore, it was established that for the co-precipitate, a Zn/Al atomic ratio equal to or greater than …
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Quantitative non-destructive study of sub-micron defects in very large scale integrated-circuit silicon using transmitted and reflected infra-red laser scattering
… Infra-Red Microscope (SIRM) and the Optical Precipitate Profiler (OPP) to detect oxygen precipitate defects in silicon were investigated. Two sets of specimens were made and studied. One set had wafers containing the same bulk defect density, but had different precipitate growth thermal …
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Mechanical Properties and Microstructure of Copper Alloys and Copper Alloy-Stainless Steel Laminates for Fusion Reactor High Heat Flux Applications
… regions including: microporosity, new precipitate formation, existing precipitate morphology changes and interdiffusion of constituent elements.
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Grain boundary precipitation in aluminum alloy 7075
… alloys is related to the distribution of precipitates on grain boundaries. In particular, an increase in the spacing of grain boundary precipitates has been correlated with an increase in the resistance to stress corrosion cracking [1]. In this study, three approaches to heat treating …
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