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in subjects: "Annealing"

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Recovery of deformed and hydrogen-charge palladium

Positron lifetime and Doppler-broadening studies made at 300 K have been used to investigate the interaction between interstitial hydrogen and lattice defects in deformed Pd. Specimens were charged with hydrogen at 300 K to levels up to 0.1%. The presence of hydrogen was found to have no effect on the recovery curves of Pd upon annealing to 400/sup 0/C. By 400/sup 0/C the values for both lifetime and Doppler-broadening for both cold worked and cold worked plus hydrogen were below the values obt… more

Date: January 1, 1982

Creator: Snead, C. L. Jr.; Lynn, K. G. & Lynch, J. F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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High-energy proton radiation damage of high-purity germanium detectors

Motivated by their applicability to gamma-ray spectroscopy experiments in space, quantitative studies of radiation damage effects in high-purity germanium detectors due to high-energy charged particles have been initiated with the irradiation by 6 GeV/c protons of two 1.0 cm thick planar detectors maintained at 88/sup 0/K. The threshold for resolution degradation and the annealing characteristics differs markedly from those previously observed for detectors irradiated by fast neutrons. Under pr… more

Date: October 1, 1977

Creator: Pehl, R.H.; Varnell, L.S. & Metzger, A.E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Interaction of noble-metal fission products with pyrolytic silicon carbide

Fuel particles for the High-Temperature Gas-Cooled Reactor (HTGR) contain layers of pyrolytic carbon and silicon carbide, which act as a miniature pressure vessel and form the primary fission product barrier. Of the many fission products formed during irradiation, the noble metals are of particular interest because they interact significantly with the SiC layer and their concentrations are somewhat higher in the low-enriched uranium fuels currently under consideration. To study fission product-… more

Date: January 1, 1982

Creator: Lauf, R. J. & Braski, D. N.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Laser annealing of ion implanted CZ silicon for solar cell junction formation. Quarterly report No. 2

Results on a contract to evaluate the merits of large spot size pulsed laser annealing of ion implanted silicon wafers for junction formation in solar cells are reported. Investigations on homogenization of the laser beam were continued. In addition to the 30 mm diameter fused silica rod with a 90/sup 0/ bend configuration, quartz tubes were obtained and briefly tried. Best results were obtained with the rod homogenizer. Laser annealing experimentation resulted in complete recrystallization of … more

Date: October 1, 1980

Creator: Katzeff, J. S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Energy dependence of metallic-encapsulated thermoluminescent dosimeters. Annual report

The gamma-ray energy responses of encapsulated /sup 7/LiF and CaF/sub 2/:Mn thermoluminescent dosimeters were measured and compred to calculated values. This study was performed in order to improve the accuracy of gamma-ray heating measurements made in polyenergetic gamma-ray fields such as Argonne National Laboratory's Zero Power Reactors. Equations used in the development of the TERC/III computer code and code input parameters are specified. A section on TLD precision is also included. Compar… more

Date: June 1980

Creator: Simons, G. G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Investigations of CuInSe sub 2 Thin Films and Contacts

This report describes research into electrical contacts for copper indium diselenide (CuInSe{sub 2}) polycrystalline thin films used for solar cell applications. Molybdenum contacts have historically been the most promising for heterojunction solar cells. This program studied contact stability by investigating thermally induced bilayer reactions between molybdenum and copper, indium, and selenium. Because selenization is widely used to fabricate CuInSe{sub 2} thin films for photovoltaic cells, … more

Date: October 1, 1991

Creator: Nicolet, M. A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Cadmium sulfide/copper ternary heterojunction cell research. Final report, January 8, 1979-June 7, 1980

Dual source, Se and CuInSe/sub 2/, coevaporation and flash evaporation of stoichiometric CuInSe/sub 2/ powder were investigated to develop a process of fabricating large area CdS/CuInSe/sub 2/ heterojunction solar cells. CuInSe/sub 2/ was seen to decompose upon evaporation, producing layered films in the dual source system. Annealing of these films and alternative dual sources have been considered. Single phase p type films have been produced but no devices have been made from such films. Flash… more

Date: January 1, 1980

Creator: Fleming, D. L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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An HVEM study of displacement cascade damage in Nb/sub 3/Sn at 13 K

TEM images of the martensite structure in Nb/sub 3/Sn were recorded at various temperatures between 12 and 30/degree/K. The transition to the superconducting state was observed by a slight deflection of the electron beam due to a perturbation of the magnetic field of the objective lens at the sample. The primary interest is in irradiation effects due to fast neutrons from a fusion reactor, and therefore ion irradiation conditions that are somewhat comparable to this were selected. These consist… more

Date: February 1, 1988

Creator: Kirk, M. A.; Baker, M. C.; Kestel, B. J.; Weber, H. W. & Kampwirth, R. T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Effect of annealing on the substructure of cold worked FCC metals and alloys. Final report, January 1, 1965--December 31, 1974

No Description Available.

Date: January 1, 1974

Creator: Mikkola, D.E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Auger study of surface carbon and oxygen on thorium following ion bombardment

The composition of a thorium metal surface has been monitored using Auger electron spectroscopy following Ar/sup +/ bombardment at different temperatures. After extended Ar/sup +/ bombardment, enough contaminated overlayers were removed to expose a surface region containing only thorium, bulk impurities, and imbedded argon. The main impurities, carbon and oxygen, differed in their behavior when the sample was annealed following bombardment. The amount of surface carbon either increased or remai… more

Date: November 17, 1977

Creator: Bastasz, R. & Colmenares, C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Development of copper sulfide/cadmium sulfide thin film solar cells. First technical progress report, 13 July 1979 to 12 October 1979

Preparation of CdS films by evaporation from a single graphite source, as generally used by the Institute of Energy Conversion (IEC) group at the University of Delaware, has been implemented. Previously at Westinghouse, four evaporation sources were used to permit uniform coverage of large area substrates. The graphite source used in this period is somewhat smaller than the IEC design to permit accommodation to the heater geometry currently available. Initial efforts with the single source evap… more

Date: February 14, 1980

Creator: Szedon, J. R.; Shirland, F. A.; Stoll, J. A. & Dickey, H. C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Failure of sheathed thermocouples due to thermal cycling

Open circuit failures (up to 100%) in small-diameter thermocouples used in electrically heated nuclear fuel rod simulator prototypes during thermal cycling tests were investigated to determine the cause(s) of the failures. The experiments conducted to determine the relative effects of differential thermal expansion, wire size, grain size, and manufacturing technology are described. It was concluded that the large grain size and embrittlement which result from certain common manufacturing anneal… more

Date: March 1, 1982

Creator: Anderson, R.L. & Ludwig, R.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Some recent observations on the radiation behavior of uranium silicide dispersion fuel

Addition of B{sub 4}C burnable poison results in higher plate swelling in both U{sub 3}Si{sub 2} and U{sub 3}Si-Al dispersion fuel plates and also decreases the blister threshold temperature of these plates. Prolonged annealing of U{sub 3}Si{sub 2}-Al fuel plates produced no blister after 696 hours at 400{degrees}C. Blister formation started between 257 hours and 327 hours at 425{degrees}C and between 115 hours and 210 hours at 450{degrees}C. Operation with breached cladding resulted in pillowi… more

Date: January 1, 1988

Creator: Hofman, G.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Irreversibility behavior in Ag-sheathed Bi-based superconducting wires

Irreversibility lines for Ag/(Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub y}(2223) wires prepared through a phase formation- decomposition-recovery (PFDR) process and normal annealing process were determined using both AC susceptibility measurements under DC fields and magnetisation measurements. It was found that flux pinning was enhanced in the PFDR processed samples over the normal processed samples, in particular at temperature above 77 K. The PFDR process results in high mass density, gr… more

Date: April 1, 1992

Creator: Dou, S.X.; Liu, H.K.; Guo, Y.C.; Wang, J.; Jin, X.J.; Hu, Q.Y. (New South Wales Univ., Kensington (Australia)) et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Gas-cooled reactor programs: High-Temperature Gas-Cooled Reactor Base-Technology Program. Annual progress report for period ending December 31, 1979

Progress in HTGR studies is reported in the following areas: HTGR chemistry; fueled graphite development; prestressed concrete pressure vessel development; structural materials; HTGR graphite studies; and evaluation of the pebble-bed HTR.

Date: July 1, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Embrittlement of the Shippingport reactor shield tank

The irradiation embrittlement of the Shippingport neutron tank material has been characterized. Irradiation increases the Charpy transition temperature (CTT) by {approximately}25{degrees}C (45{degrees}F) and decreases the upper shelf energy. The shift in CTT is not as severe as that observed in the HFIR surveillance specimens. However, the actual value of CTT is higher than that for the HFIR data and the toughness at service temperature is low. The increase in yield stress is 51 MPa (7.4 ksi), … more

Date: October 1, 1989

Creator: Chopra, O. K. & Shack, W. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Tempered glass

This document describes a demonstration for making tempered glass using minimal equipment. The demonstration is intended for a typical student of materials science, at the high school level or above. (JL)

Date: November 1, 1991

Creator: Bunnell, L.R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Spray solar cell research: CdS/Cu/sub 2/S cells by ion exchange-CSD. Quarterly report No. 1, October 1-December 31, 1979

A study of the applicability of the Chemical Spray Deposition-Ion Exchange Technique to the formation of high efficiency, low cost Cu/sub 2/S/CdS solar cells has been undertaken. A Chemical Spray Deposition (CSD) apparatus and an Ion Exchange annealing station have been designed, and construction of these facilities is nearing completion. The object is to form films of CdO and Cu/sub 2/O by spraying appropriate solutions onto a heated substrate, and then to convert these oxides into CdS and Cu/… more

Date: January 1, 1979

Creator: Maruska, H.P. & Young, A.R. II

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Amorphous thin films for solar cell application. Quarterly report No. 2, July 1-September 30, 1979

Research on the fabrication of efficient amorphous silicon solar cells is reported. Work on the deposition of a-Si:H films by sputtering is described. Other areas under scrutiny include (a) degree and effect of oxygen and/or argon incorporation into the films, (b) dopant transfer from target to films, (c) dopant and alloy ion-implantation effects, and (d) film annealing behavior. Results to date are presented. (WHK)

Date: October 1, 1979

Creator: Jonath, A D; Crowley, J L; MacMillan, H F; Anderson, W W; Junga, F A; Kooi, C F et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Photoelectronic properties of zinc phosphide crystals, films and heterojunctions. Quarterly progress report No. 2, July 1-September 30, 1979

The closed tube horizontal growth method has been pursued for the growth of single crystals of Zn/sub 3/P/sub 2/. The rate of material transport was increased by increasing the temperature difference between source and growth regions and by decreasing the distance involved. A boule with only 2 grains in a 12 mm diameter has been obtained. The as-grown resistivity of this single crystal Zn/sub 3/P/sub 2/ was 50 ohm-cm, which was reduced to 10 ohm-cm by subsequent annealing in hydrogen at 410/sup… more

Date: October 1, 1979

Creator: Bube, R.H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Synthesis, evaluation and defect compensation of tetrahedral glasses as possible solar cell materials. Final report, February 1, 1979-April 30, 1980

The work reported was directed towards evaluation of new amorphous compounds for application in solar cells. The ternary A/sup II/B/sup IV/C/sub 2//sup V/ chalcopyrite systems were selected because of their inexpensive constituent elements and tetrahedral geometry. Polycrystalline samples of the ternary arsenides with Cd and Zn as the group II element and Ge, Si, Sn as the group IV element were synthesized. Thin films were deposited by vacuum evaporation of the bulk ternary arsenides. The stoic… more

Date: April 1, 1980

Creator: Rauh, R. D.; Rose, T. L. & Scoville, A. N.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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NTD germanium: a novel material for low-temperature bolometers

Six samples of ultra-pure (absolute value N/sub A/ - N/sub D/ absolute value less than or equal to 10/sup 11/cm/sup -3/), single-crystal germanium have been neutron transmutation doped with neutron doses between 7.5 x 10/sup 16/ and 1.88 x 10/sup 18/cm/sup -2/. After thermal annealing at 400/sup 0/C for six hours in a pure argon atmosphere, the samples have been characterized with Hall effect and resistivity measurements between 300 and 0.3 K. Our results show that the resistivity in the low te… more

Date: June 1, 1982

Creator: Haller, E. E.; Palaio, N. P.; Rodder, M.; Hansen, W. L. & Kreysa, E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Study of radiation damage in metals by positron annihilation. [Neutron irradiation]

Positron annihilation is a sensitive technique for probing defects in metals and it has recently been shown to be a valuable tool for the study of radiation damage. After an introduction to the three basic experimental methods (angular correlation, Doppler broadening, and lifetime measurements), the interaction of positrons with lattice defects is reviewed. Results for the annealing of damage after low temperature irradiation are used to show that positron annihilation has provided new informat… more

Date: January 1, 1977

Creator: Gauster, W.B

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Study of short-range motion of atomic hydrogen in amorphous silicon by neutron reflectometry

Preliminary results of neutron reflectometry (NR) measurements on rf sputter-deposited a-Si:H/a-Si:D bilayers indicate that this technique may be used to monitor H and D motions over distances of {approx} 10 to 200 {Angstrom} with a nominal resolution of 5--10 {Angstrom}. In studying rf sputter-deposited thin films containing a high density of microvoids annealed at 270 C, we found that the hydrogen diffused a distance of only {approx} 100 {Angstrom}. Further annealing at 270 and 280 C produced… more

Date: May 1, 1992

Creator: Dozier, W.D. (Argonne National Lab., IL (United States)); Herwig, K.W. (Missouri Univ., Columbia, MO (United States). Research Reactor Facility); Shinar, R. (Iowa State Univ. of Science and Technology, Ames, IA (United States). Microelectronics Research Center); Jia, H. & Shinar, J. (Ames Lab., IA (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department