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There are a total of 45 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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Use of high L.E.T. radiation to improve adhesion of metals to polytetrafluoroethylene
Author(s): Wheeler, D. R.; Pepper, S. V.
Abstract: MgK alpha X-rays (1254 eV) and 2 keV electrons irradiate the surface of polytetrafluoro ethylene (PTFE). The damage is confined to a few tenths of a micron below the surface, and the doses exceed 10 to the eight power rad. ...
NASA Center: Glenn Research Center
Publication Year: 1982
Added to NTRS: 2008-11-07
Accession Number: 83N30660; Document ID: 19830022389; Report Number: E-1701, NAS 1.15:83413, NASA-TM-83413
Adhesion between polymers and evaporated gold and nickel films
Author(s): Yamada, Y.; Wheeler, D. R.; Buckley, D. H.
Abstract: To obtain information on the adhesion between metal films and polymeric solids, the adhesion force was measured by means of a tensile pull test. It was found that the adhesion strengths between polymeric solids and gold ...
NASA Center: Glenn Research Center
Publication Year: 1984
Added to NTRS: 2008-07-31
Accession Number: 84N31379; Document ID: 19840023309; Report Number: E-2018, NAS 1.60:2360, NASA-TP-2360
The preliminary evaluation of liquid lubricants for space applications by vacuum tribometry
Author(s): Jones, W. R., Jr.; Pepper, S. V.; Herrera-Fierro, P.; Feuchter, D.; Toddy, T. J.; Jayne, D. T.; Wheeler, D. R.; Abel, P. B.; Kingsbury, E.; Morales, W., et al.
Abstract: Four different vacuum tribometers for the evaluation of liquid lubricants for space applications are described. These range from simple ball-on-flat sliders with maximum in-situ control and surface characterization to an ...
NASA Center: Glenn Research Center
Publication Year: 1994
Added to NTRS: 2008-06-02
Accession Number: 94N33313; Document ID: 19940028807
Passivating Window/First Layer AR Coating for Space Solar Cells
Author(s): Faur, Mircea; Faur, Maria; Bailey, S. G.; Flood, D. J.; Brinker, D. J.; Alterovitz, S. A.; Wheeler, D. R.; Matesscu, G.; Goradia, C.; Goradia, M.
Abstract: Chemically grown oxides, if well designed, offer excellent surface passivation of the emitter surface of space solar cells and can be used as effective passivating window/first layer AR coating. In this paper, we demonstrate ...
NASA Center: Glenn Research Center
Publication Year: 2004
Added to NTRS: 2005-11-24
Document ID: 20040142236
Friction and wear of radiofrequency-sputtered borides, silicides, and carbides
Author(s): Brainard, W. A.; Wheeler, D. R.
Abstract: The friction and wear properties of several refractory compound coatings were examined. These compounds were applied to 440 C bearing steel surfaces by radiofrequency (RF) sputtering. The refractory compounds were the ...
NASA Center: Glenn Research Center
Publication Year: 1978
Added to NTRS: 2005-10-13
Accession Number: 78N20338; Document ID: 19780012395; Report Number: E-9384, NASA-TP-1156
X-Ray photoelectron spectroscopy study of radiofrequency-sputtered titanium, carbide, molybdenum carbide, and titanium boride coatings and their friction properties
Author(s): Brainard, W. A.; Wheeler, D. R.
Abstract: Radiofrequency sputtered coatings of titanium carbide, molybdenum carbide and titanium boride were tested as wear resistant coatings on stainless steel in a pin on disk apparatus. X-ray photoelectron spectroscopy (XPS) was ...
NASA Center: Glenn Research Center
Publication Year: 1977
Added to NTRS: 2005-10-13
Accession Number: 77N33348; Document ID: 19770026404; Report Number: E-9102, NASA-TP-1033
Polytetrafluoroethylene transfer film studied with X-ray photoelectron spectroscopy
Author(s): Wheeler, D. R.
Abstract: Polytetrafluoroethylene (PTFE) was rubbed against nickel in ultrahigh vacuum at loads up to 3.9 N and speeds up to 94 mm/sec. The transfer film formed on the nickel was analyzed using X-ray phototectron spectroscopy. The ...
NASA Center: Glenn Research Center
Publication Year: 1980
Added to NTRS: 2005-10-13
Accession Number: 81N11214; Document ID: 19810002706; Report Number: E-414, NASA-TP-1728
Improved adherence of sputtered titanium carbide coatings on nickel- and titanium-base alloys
Author(s): Wheeler, D. R.; Brainard, W. A.
Abstract: Rene 41 and Ti-6Al-4V alloys were radio frequency sputter coated with titanium carbide by several techniques in order to determine the most effective. Coatings were evaluated in pin-on-disk tests. Surface analysis by X-ray ...
NASA Center: Glenn Research Center
Publication Year: 1979
Added to NTRS: 2005-10-13
Accession Number: 79N22194; Document ID: 19790014023; Report Number: E-9838, NASA-TP-1450
Effect of nitrogen-containing plasma on adherence, friction, and wear of radiofrequency-sputtered titanium carbide coatings
Author(s): Brainard, W. A.; Wheeler, D. R.
Abstract: Friction and wear experiments on 440C steel surfaces that were rf sputtered with titanium carbide when a small percentage of nitrogen was added to the plasma were conducted. Both X-ray photoelectron spectroscopy and X-ray ...
NASA Center: Glenn Research Center
Publication Year: 1979
Added to NTRS: 2005-10-13
Accession Number: 79N15184; Document ID: 19790007013; Report Number: E-9681, NASA-TP-1377
Surface chemistry of iron sliding in air and nitrogen lubricated with hexadecane and hexadecane containing dibenzyl-dilsulfide
Author(s): Wheeler, D. R.
Abstract: Wear experiments were conducted on iron sliding in hexadecane and hexadecane plus one weight percent dibenzyl dilsulfide (DBDS) in atmospheres of air and nitrogen at room temperature. The wear scars and the wear debris were ...
NASA Center: Glenn Research Center
Publication Year: 1979
Added to NTRS: 2005-10-13
Accession Number: 79N31346; Document ID: 19790023175; Report Number: E-9956, NASA-TP-1545
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