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in subjects: "Physical Vapor Deposition"  
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Dimensional effects in controlled structure supported catalysts derived from layered synthetic microstructures. Final progress report for period March 1, 1997 - February 28, 2000

Description: Several heterogeneous catalytic reactions show size dependence, whereby the specific rate changes with the average diameter of supported metal particles in the nanometer range. Geometric arguments relating the size dependence to the relative concentration of active sites on idealized crystal particles cannot account for all the observed results. In an effort to overcome the geometric limitations of supported particles, the authors had previously created novel supported metal catalysts called La… more
Date: September 13, 2002
Creator: Saltsburg, Howard
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Inclined substrate deposition of magnesium oxide for YBCO-coated conductors.

Description: Thin films of YBa{sub 2}Cu{sub 3}O{sub 7-x} (YBCO) were grown on MgO buffered metallic substrates by pulsed laser deposition (PLD). The MgO buffer films, which provide the initial biaxial texture, had been grown on polished Hastelloy C276 (HC) tapes using inclined substrate deposition (ISD). The ISD process is promising for the fabrication of coated superconductor wires because it produces biaxially textured template films on nontextured substrate at high deposition rates. Biaxially aligned MgO… more
Date: April 26, 2002
Creator: Ma, B.; Li, M.; Fisher, B. L.; Koritala, R. E.; Dorris, S. E.; Maroni, V. A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Practical superconductor development for electrical power applications - quarterly report for the period ending March 31, 2002.

Description: This is a multiyear experimental research program that focuses on improving relevant material properties of high-T{sub c} superconductors (HTSs) and developing fabrication methods that can be transferred to industry for production of commercial conductors. The development of teaming relationships through agreements with industrial partners is a key element of the Argonne National Laboratory (ANL) program. Technical Highlights are the capabilities and performance of a new pulsed laser deposition… more
Date: May 22, 2002
Creator: Dorris, S. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Transparent ZnO-based ohmic contact to p-GaN

Description: Highly conductive ZnO films were fabricated on p-GaN in a two-step process. First, zinc was thermally evaporated on p-GaN. Next, zinc film was oxidized in oxygen flow. To increase the conductivity of ZnO, nitrogen was introduced into zinc during its deposition. The above procedure proved successful in fabricating ZnO of the resistivity of {approx}1 x 10{sup -3} {Omega}cm and resulted in ohmic contacts of resistivity {approx}1 x 10{sup -2} {Omega}cm{sup 2} to low-doped p-GaN, and light transmitt… more
Date: April 9, 2002
Creator: Kaminska, E.; Piotrowska, A.; Golaszewska, K.; Guziewicz, M.; Kruszka, R.; Kudla, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Electrodeposition of CuIn1-xGaxSe2 Materials for Solar Cells:

Description: This report describes our scientific understanding of the CIGS materials system, solar cells, and processes. Through DOE support, the investigators developed much of the technology and device fabrication infrastructure applied to electrodeposited (ED) materials. The electrodeposition process is simple and fast, and can synthesize multinary precursors for subsequent processing into CuInxGa1-xSe2 (CIGS) thin-film absorbers for solar cells. The device fabricated by using electrodeposited CIGS prec… more
Date: October 1, 2002
Creator: Bhattacharya, R. N.; Fernandez, A. M.; Batchelor, W.; Alleman, J.; Keane, J.; Althani, H. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Monte Carlo Modeling of Thin Film Deposition: Factors that Influence 3D Islands

Description: In this paper we discuss the use of atomistic Monte Carlo simulations to predict film microstructure evolution. We discuss physical vapor deposition, and are primarily concerned with films that are formed by the nucleation and coalescence of 3D islands. Multi-scale modeling is used in the sense that information obtained from molecular dynamics and first principles calculations provide atomic interaction energies, surface and grain boundary properties and diffusion rates for use in the Monte Car… more
Date: January 4, 2002
Creator: Gilmer, G H; Dalla Torre, J; Baumann, F H & Diaz de la Rubia, T
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Modeling for CVD of Solid Oxide Electrolyte

Description: Because of its low thermal conductivity, high thermal expansion and high oxygen ion conductivity yttria-stabilized zirconia (YSZ) is the material of choice for high temperature electrolyte applications. Current coating fabrication methods have their drawbacks, however. Air plasma spray (APS) is a relatively low-cost process and is suitable for large and relatively complex shapes. it is difficult to produce uniform, relatively thin coatings with this process, however, and the coatings do not exh… more
Date: September 18, 2002
Creator: Starr, T. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Impermeable Thin Al2O3 Overlay for TBC Protection From Sulfate and Vanadate Attack in Gas Turbines Quarterly Report

Description: In order to improve the hot corrosion resistance of conventional YSZ TBC system, the overlay of Al{sub 2}O{sub 3} coating was deposited on the TBC by EB-PVD techniques. Hot corrosion tests were carried out on the TBC with and without Al{sub 2}O{sub 3} coating in molten salts mixtures (Na{sub 2}SO{sub 4} + 5%V{sub 2}O{sub 5}) at 950 C for 10h. The microstructures of TBC and overlay before and after exposure were examined by means of scanning electron microscopy (SEM), energy-dispersive X-ray spe… more
Date: January 31, 2002
Creator: Mao, Scott X.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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