NASA Scientific and Technical Aerospace Reports

materials were manufactured using these specialized fabrics, and the preliminary structural and impact energy responses of
these materials have been measured.
DTIC
Energy Absorption; Fiber Composites; Glass Fibers
20040111671
Investigation of the Cubic Non-Linearity of New Organometallic Cyano-Containing Polymers by Z-Scan and Two
Beam Coupling With Spectral Resolving
Douglas, William; Oct. 15, 2003; 20 pp.; In English
Contract(s)/Grant(s): FA8655-02-M-4074
Report No.(s): AD-A425796; EOARD-SPC-02-4074; No Copyright; Avail: CASI; A03, Hardcopy
This report results from a contract tasking Universite de Montpellier II as follows: The contractor will investigate the
nonlinear optical properties of organic and organo-metallic polymers and hybrid organic-inorganic composites. These
materials exhibit strong nonlinear properties with fast (femtosecond) response times. These materials are potentially useful for
optical switching of telecommunications devices, phase conjugation, optical limiters, and optical multiplexing. Advances in
these subjects can significantly improve performance of Air Force optical and telecommunications systems.
DTIC
Cyano Compounds; Linearity; Nonlinear Optics; Organometallic Polymers; Resolution; Spectra
20040112001 NASA Glenn Research Center, Cleveland, OH, USA
Optical Diagnostics for Thermal Barrier Coatings
Eldridge, J. I.; Spuckler, C. M.; Bencic, T. J.; Martin, R. E.; January 16, 2004; 20 pp.; In English; Conference on Composites,
Materials and Structures, 25-30 Jan. 2004, Cocoa Beach, FL, USA
Contract(s)/Grant(s): 22-090-20-C1; Copyright; Avail: CASI; A03, Hardcopy
The translucent nature of ceramic oxide thermal barrier coatings (TBCs) provides an opportunity to employ optical probes
to monitor temperature gradients and buried damage propagation within the coating. An important advantage of noncontact
optical diagnostics is that they are amendable to health monitoring of TBCs in service. In this paper, two optical diagnostic
approaches, operating in different wavelength regimes, are discussed. The first approach is the use of mid-infrared reflectance
(MIR) to monitor the progression of TBC delamination produced by thermal cycling. This approach takes advantage of the
maximum transparency of the TBCs at mid-infrared wavelengths, in particular, between 3 and 5 microns. Recent progress in
extending the MIR method to a more practical visual inspection tool will be presented. A second approach, using visible
wavelengths, is the embedding of thermographic phosphors within the TBC to add sensing functions to the coating that can
provide depth-selective information about temperature gradients and TBC integrity. Emphasis will be given to the use of
fluorescence decay time measurements to provide temperature readings from a thermographic phosphor layer residing beneath
the TBC.
Author
Ceramic Coatings; Oxides; Thermal Control Coatings; Probes; Optical Properties
20040112041 NASA Glenn Research Center, Cleveland, OH, USA
Sintering of BaCe(0.85)Y(0.15)O3-(Beta) With/Without SrTiO Dopant
Dynys, Fred; Sayir, Ali; Heimann, Paula J.; [2004]; 6 pp.; In English; 28th International Cocoa Beach Conference, 25-30 Jan.
2004, Cocoa Beach, FL, USA
Contract(s)/Grant(s): NCC3-850; 22-274-00-0304; No Copyright; Avail: CASI; A02, Hardcopy
The sintering behavior of BaCe(0.85)Y(0.15)O3-(Beta) doped with SrTiO is described. Complete reaction and
crystallization of perovskite phase by solid state was achieved by calcining at 1200 degrees C for 24 hours.Smaples were
sintered at 1450 degrees C, 1550 degrees C, and 1650 degrees C. SrTiOsub3 enhanced sintering, while optimal dopant level
was different for powders synthesized by solid state and co-precipitation. Both powders exhibit similar grain growth behavior.
Derived from text
Perovskites; Barium Oxides; Cerium Oxides; Yttrium Oxides
20040120881 Battelle Columbus Labs., OH
Review of Currently Available Lead-Based Pain Encapsulants and Use Patterns in the Control of Residential Lead
Based Paint Hazards
Mar. 2003; 102 pp.; In English
Report No.(s): PB2004-107373; No Copyright; Avail: CASI; A06, Hardcopy
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