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There are a total of 759 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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Chemical vapor deposition for silicon cladding on advanced ceramics
Author(s): Goela, Jitendra S.; Taylor, Raymond L.
Abstract: Polycrystalline Si was used to clad several advanced ceramic materials such as SiC, Si3N4, sapphire Al2O3, pyrolytic BN, and Si by a CVD process. The thickness of Si cladding ranged from 0.025 to 3.0 mm. CVD Si adhered quite ...
NASA Center: NASA (non Center Specific)
Publication Year: 1989
Added to NTRS: 2004-11-03
Accession Number: 91A32148; Document ID: 19910047525
Parametric evaluation of ball milling of SiC in water
Author(s): Kiser, J. D.; Herbell, T. P.; Freedman, M. R.
Abstract: A statistically designed experiment was conducted to determine optimum conditions for ball milling alpha-SiC in water. The influence of pH adjustment, volume percent solids loading, and mill rotational speed on grinding ...
NASA Center: Glenn Research Center
Publication Year: 1985
Added to NTRS: 2004-11-03
Accession Number: 86A15240; Document ID: 19860030502
Composition optimization of self-lubricating chromium-carbide-based composite coatings for use to 760 C
Author(s): Dellacorte, Chris; Sliney, Harold E.
Abstract: This paper describes new compositions of self-lubricating coatings that contain chromium carbide. A bonded chromium carbide was used as the base stock because of the known excellent wear resistance and the chemical stability ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2004-11-03
Accession Number: 87A27838; Document ID: 19870040564
Some inelastic effects of thermal cycling on ZrO2-Y2O3 materials
Author(s): Hendricks, R. C.; Mcdonald, G.; Bill, R. C.
Abstract: An analysis has been developed which relates the effects of inelastic behavior of Y2O3 stabilized ZrO2 (YSZ) materials. The results show these materials to be sensitive to small changes in temperature and are supported by ...
NASA Center: Glenn Research Center
Publication Year: 1982
Added to NTRS: 2004-11-03
Accession Number: 83A22272; Document ID: 19830041054
The colloidal chemistry of ceramic clays
Author(s): Phelps, G. W.
Abstract: The colloidal chemistry and mineralogy of two argil minerals were studied. Deposits of kaolin and of ceramic clays in the United States and England are discussed for the probable mechanism of formation. The structural ...
NASA Center: NASA (non Center Specific)
Publication Year: 1984
Added to NTRS: 2004-11-03
Accession Number: 85N12163; Document ID: 19850003855; Report Number: NAS 1.15:77734, NASA-TM-77734
Sintering behavior of ultrafine silicon carbide powders obtained by vapor phase reaction
Author(s): Okabe, Y.; Miyachi, K.; Hojo, J.; Kato, A.
Abstract: The sintering behavior of ultrafine SiC powder with average particle size of about 0.01-0.06 microns produced by a vapor phase reaction of the Me4Si-H2 system was studied at the temperature range of 1400-2050 deg. It was ...
NASA Center: NASA (non Center Specific)
Publication Year: 1984
Added to NTRS: 2004-11-03
Accession Number: 85N12161; Document ID: 19850003853; Report Number: NAS 1.15:77422, NASA-TM-77422
Selected fretting-wear-resistant coatings for Ti-6 pct Al-4 pct V alloy
Author(s): Bill, R. C.
Abstract: The ability of several wear-resistant coatings to reduce fretting in the Ti-6Al-4V alloy is investigated. The experimental apparatus and procedures for evaluating fretting in uncoated Ti-6Al-4V alloy and in the alloy with ...
NASA Center: Glenn Research Center
Publication Year: 1985
Added to NTRS: 2004-11-03
Accession Number: 86A24956; Document ID: 19860040218
The effect of oxygen concentration on the boundary-lubricating characteristics of a C ether and a polyphenyl ether to 300 C
Author(s): Jones, W. R., Jr.
Abstract: Ball-on-disk sliding friction experiments were carried out at 17 m/min (100 rev/min) to investigate the effect of oxygen concentration varying from 20 (air) to 0.001 (nitrogen) on the boundary-lubricating characteristics of ...
NASA Center: Glenn Research Center
Publication Year: 1981
Added to NTRS: 2004-11-03
Accession Number: 82A21699; Document ID: 19820038164
Residual stress in plasma-sprayed ceramic turbine tip and gas-path seal specimens
Author(s): Hendricks, R. C.; Mcdonald, G.; Mullen, R. L.
Abstract: The residual stresses in a ceramic sheet material used for turbine blade tip gas path seals, were estimated. These stresses result from the plasma spraying process which leaves the surface of the sheet in tension. To ...
NASA Center: Glenn Research Center
Publication Year: 1983
Added to NTRS: 2004-11-03
Accession Number: 84A19783; Document ID: 19840036996
Studies of magnetic resonance phenomena in polymers. II - Molecular motions in poly(methyl methacrylate) as studied by spin-probe and spin-label methods
Author(s): Tsay, Fun-Dow; Gupta, Amitava
Abstract: No Abstract Available
NASA Center: Jet Propulsion Laboratory
Publication Year: 1987
Added to NTRS: 2004-11-03
Accession Number: 88A28686; Document ID: 19880041459
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