Materials Literature
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Significance and UseDuctile vs. Brittle Behavior—Body-centered-cubic or ferritic alloys exhibit a significant transition in behavior when impact tested over a range of temperatures. At temperatures above transition, impact specimens fracture by a ductile
We use density functional theory (DFT) calculations to study the lattice vibrations and electronic properties of the correlated metal LaNiO$_3$. To characterize the rhombohedral to cubic structural phase transition of perovskite LaNiO$_3$, we examine the evolution of the Raman-active phonon modes with temperature. We…
Some kinds of phosphors were synthesized with Eu/Dy coating ZnO nanocrystals by co-precipitation approach derived from Zn(AC)2 2H2O, NaOH as precursors. The crystal structure and size were characterized by the X-ray diffraction Photoluminescence(PL) measurements show an intense red luminescence at 612 nm caused by tra…
A series of CdSe nanoparticle-deposited anatase TiO2 nanobelts were prepared by hydrothermal process. Their crystal structures, morphologies, depositing content of CdSe and visible-light photocatalytic activities were characterized using various measurement techniques. The measurement results show that the CdSe nanopa…
In the present paper, the samples of nanomaterials TiO2-SiO2:Eu3+ with different proportion of Ti/Si were prepared with the sol-gel method, and influence of the proportion of Ti/Si on the luminescence properties of samples have was studied. The structure of the samples was examined by FTIR, indicating that the compoun…
A one-dimensional isobaric reactor model is used to simulate hydrogen isotope exchange processes taking place during flow through a powdered palladium bed. This simple model is designed to serve primarily as a platform for the initial development of detailed chemical mechanisms that can then be refined with the aid of…
Practical disposal of nuclear waste requires high-throughput separation techniques. The most dangerous part of nuclear waste is the fission product, which contains the most active and mobile radioisotopes and produces most of the heat. We suggest that the fission products could be separated as a group from nuclear was…
This preliminary project execution plan (PEP) defines U.S. Department of Energy (DOE) project objectives, roles and responsibilities of project participants, project organization, and controls to effectively manage acquisition of capital funds for construction of a proposed remote-handled low-level waste (LLW) disposa…
Optical properties of a localized surface plasmon (LSP) in metallic nanoparticles (MNPs) are widely used for applications in the biosensor, the medical therapy, the plasmonic optical devices and so on. If we can dynamically control a collective behavior of LSP by assembling lots of MNPs under thermal fluctuations, we…
University of Minnesota Ph.D. dissertation. May 2011. Major: Material Science and Engineering. Advisor: William W. Gerberich. 1 computer file (PDF); xii, 163 pages.
The accumulation of carbon dioxide in the atmosphere continues to be an important ecological issue associated with global warming. The demand for improved efficiencies in energy conversion in recent years has led to the introduction of land-based gas turbines with significantly increased inlet temperatures. To accompl…
Significance and Use This test method provides a cooling time versus temperature pathway that is directly proportional to physical properties such as the hardness obtainable upon quenching of a metal. The results obtained by this test method may be used a
A power transformer is a static piece of apparatus with two or more windings which, by electromagnetic induction, transforms a system of alternating voltage and current into another system of voltage and current usually of different values and at same frequency for the purpose of transmitting electrical power. The hot…
This document describes the design-build acquisition strategy that will be applied to the Remote Handled LLW Disposal Project. The design-build delivery method will be tailored, as appropriate, to integrate the requirements of Department of Energy (DOE) Order 413.3B, 'Program and Project Management for the Acquisition…
For convenient use of energy, it is common to use chemical potential energy stored in a fuel.To reduce pollution, a desirable fuel is molecular hydrogen, whose only byproduct is water vapor.However, there are still many obstacles that must be overcome for it to become widely used; the most significant is its storage.D…
Abstract : The intermolecular interaction energies of 1,1-diamino-2,2-dinitroethylene (Fox-7), hexanitrobenzene (HNB), 2,4,6- trinitrotoluene (TNT), 1,3,5-trinitrobenzene (TNB), 2,4,6-trinitroaniline (TNA), 1,3-diamino-2,4,6-trinitrobenzene (DATB), and 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) have been computed usi…
Smoothing techniques are designed to improve the accuracy of equating functions. The main purpose of this dissertation was to propose a new statistic (CS) and compare it to existing model selection strategies in selecting smoothing parameters for polynomial loglinear presmoothing (C) and cubic spline postsmoothing (S)…
Force spectroscopy is a very promising technique for the evaluation of interactions within different environments. Knowledge about them is especially important during the design and preparation of those modern wound dressings in contact with a changing wound-environment over a prolonged time. Such exposure can cause a…
Abstract : The development of nanocrystalline and ultrafine-grained bulk materials through powder metallurgy processes has long been constrained by the thermal stability of nanostructures. Many difficulties arise due to the fact that grain growth and densification occur within the same temperature regime. Additionally…
The current understanding of the atomic scale phenomenon associated with the influence of beta phase instabilities on the evolution of microstructure in titanium alloys is limited due to their complex nature. Such beta phase instabilities include phase separation and precipitation of nano-scale omega and alpha phases…