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Polymer Derived Rare Earth Silicate Nanocomposite Protective Coatings for Nuclear Thermal Propulsion Systems Project
nasa-test-0.demo.socrata.com | Last Updated 2015-07-20T05:33:39.000ZLeveraging a rapidly evolving state-of-the-art technical base empowered by Phase I NASA SBIR funding, NanoSonic's polymer derived rare earth silicate EBCs will provide a paradigm breaking advancement for NTPs by extending the operational utility of NTP rocket thrust chambers and nozzles. Unlike competing deposition technologies severely limited by substrate size and dimensions, NanoSonic's rare earth silicate coatings may be spray deposited under ambient conditions onto large area complex substrates and converted to mechanically robust, thermally insulative EBCs on a production basis. In fact, legacy spray equipment employed for hardcoat deposition within the marine, automotive and aerospace industries has been used for successful EBC deposition. Simulated NTP testing completed by the University of Washington on coated Inconel 625 substrates indicate five candidate EBCs have exceptional environmental, dimensional, and adhesive durability within flow conditions representative of NTP rocket engines. In fact, zero spallation, erosion, or any other form of coating degradation was observed at the thermal limit of testing of 1,950 C. All candidate resins may be transitioned to 200-gallon batch production quantities within an established manufacturing infrastructure.
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Heated Thermoplastic Fiber Placement Head for NASA Langley Research Center Project
nasa-test-0.demo.socrata.com | Last Updated 2015-07-20T05:29:25.000ZReduced mass composite materials are crucial to the success of aerospace systems, but are inhibited by expensive autoclave consolidation, especially for large parts. To remedy this, NASA-LaRC has been developing cost-effective high-performance thermoplastic composite materials for years. NASA materials could dramatically reduce the cost of large aerospace structures, because those materials avoid the autoclave. However, NASA lacks a robust, cost-effective fabrication process to tow-place these emerging materials into laminates, and thus can?t evaluate their usefulness to industry. This program develops for NASA-LaRC the processing equipment that allows material evaluation and allows out-of-autoclave fiber placement. In particular, this program will deliver a heated in situ deposition head to fit on NASA-LaRCs placement machine. Heads can also be sold to industrial companies for existing placement machines so that aerospace composites can be fabricated out of the autoclave. In phase I, the deposition head will be designed and reviewed with NASA. The process window requirements for the placement head for NASA materials will be verified. In phase II, we will complete the design, fabricate, install, and prove-out the head equipment. We then start up the deposition head at NASA so that the emerging NASA-LaRC materials can be proven in laminates.
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Generating Autoclave-Level Mechanical Properties with Out-of-Autoclave Thermoplastic Placement of Large Composite Aerospace Structures Project
nasa-test-0.demo.socrata.com | Last Updated 2015-07-20T05:41:46.000ZWhile in the 1970's and 1980's, composites were adopted for aerospace structure for increased performance and weight savings, the 1990's and 2000's witnessed the attention towards cost-effective fabrication. All thermoset processes that utilize such machines rely on autoclaves to consolidate the laminates, at significant acquisition and operational expense. Autoclaves to consolidate wings are hugely expensive. Autoclaves for fuselages are nearly cost-prohibitive (only one exists). Autoclaves for the Ares V do not exist. The marketplace would welcome a proven out-of-autoclave fabrication technology. The tasks in the ASI/UD-CCM STTR phase 1 was to assess the performance of the current TP-ATP heads, do a model based parametric study to determine possible head and process parameter changes and demonstrate an improved understanding of the head, with a goal of autoclave level properties. A set of models for the in situ Automated Tow/Tape Placement (ATP) processes that capture the important process phenomena were developed by UD-CCM. Accudyne then measured the laminate roughness, fabricated samples using a variety of conditions and tested the samples. Testing of the laminates indicate: placing with flat tape and using improved head chilling increases mechanical properties. Compacting with only a < load reduces properties. Using a vacuum bag oven reconsolidation is ineffective, and even reduces mechanical properties. The phase 2 program innovation is to develop and deploy University of Delaware process models to Accudyne's thermoplastic tow and tape placement head to remedy the mechanical property shortfall between the two fabrication processes used to manufacture large composite aerospace structure important to NASA. An additional advantage that would accrue by adopting TP-ATP would be the use of novel thermoplastic materials with thermal stability and toughness far in excess of what thermosetting materials can achieve.
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Rare Earth Permanent Magnets Based on the Metastable SmCo13 Phase for XIPSs Project
nasa-test-0.demo.socrata.com | Last Updated 2015-07-20T05:26:05.000ZRare Earth Permanent Magnets Based on the Metastable SmCo13 Phase for XIPSs Project
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MODIS/Terra Vegetation Continuous Fields Yearly L3 Global 500m SIN Grid V051
nasa-test-0.demo.socrata.com | Last Updated 2015-07-20T04:50:41.000ZMODIS/Terra Vegetation Continuous Fields Yearly L3 Global 500m SIN Grid
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MODIS/Terra Vegetation Continuous Fields Yearly L3 Global 250m SIN Grid V005
nasa-test-0.demo.socrata.com | Last Updated 2015-07-20T04:50:41.000ZMODIS/Terra Vegetation Continuous Fields Yearly L3 Global 250m SIN Grid
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MODIS/Terra Vegetation Continuous Fields Yearly L3 Global 500m ISIN Grid V003
nasa-test-0.demo.socrata.com | Last Updated 2015-07-19T08:25:14.000ZMODIS/Terra Vegetation Continuous Fields Yearly L3 Global 500m ISIN Grid (Suggested Usage: Science Research)
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AMSR-E Rainfall Subset, collocated with the CloudSat track, in HDF-EOS format V002
nasa-test-0.demo.socrata.com | Last Updated 2015-07-20T05:07:15.000ZThis is a subset of AMSR-E rain rat eproduct along CloudSat field of view track. The goal of the subset is to select and return AMSR-E data that are within +-100 km across the CloudSat track. Thus resultant subset swath is 45 pixels cross-track. Apart from that, all efforts are made to preserve the original HDF-EOS formatting of the source full-sized data. The Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) instrument on the NASA EOS Aqua satellite provides global passive microwave measurements of terrestrial, oceanic, and atmospheric variables for the investigation of water and energy cycles. The original, full-sized, product is Level-2B swath product (AE_Rain), and it contains instantaneous measurements of rain rate and rain type (convective vs. stratiform), generated from Level-2A brightness temperatures (AE_L2A). The Goddard Space Flight Center (GSFC) Profiling algorithm determines rain rate and type over ocean areas, and a Modified GSFC Profiling algorithm over land. Data are stored in HDF-EOS format, and are available from 18 June 2002 to present via FTP.
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Generating Autoclave-Level Mechanical Properties with Out-of-Autoclave Thermoplastic Placement of Large Composite Aerospace Structures Project
nasa-test-0.demo.socrata.com | Last Updated 2015-07-20T05:42:08.000ZOut-of-autoclave thermoplastic tape/tow placement (TP-ATP) is nearing commercialization but suffers a moderate gap in mechanical properties compared with laminates fabricated via thermoset autoclave processing. Out-of-autoclave thermoplastic processing significantly lowers composite aerospace part costs, but the property gap must be closed. This STTR program, endorsed herein by Boeing and Cytec Engineered Materials, will remedy the mechanical property shortfall and enable large composite aerospace structure important to NASA to be manufactured without an autoclave. Accudyne is teaming with University of Delaware ? Center for Composite Materials to apply their state-of-the-art TP-ATP process/property models to elucidate the physical mechanisms affecting microstructural quality that cause the property gap. Models will be applied to the NASA LaRC TP-ATP deposition head to optimize the head configuration and machine operating parameters, and the control systems for full mechanical properties. Laminates will be manufactured to demonstrate the property improvements. The process, head, and equipment changes will be upgraded on the NASA-LaRC thermoplastic tape head. In Phase 2, process/head modeling will be extended through laminate fabrication and testing, and a component of interest to NASA will be fabricated demonstrating the improved "autoclave level" mechanical performance.
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Coordinated Eastern Arctic Experiment (CEAREX) Data
nasa-test-0.demo.socrata.com | Last Updated 2015-07-19T09:11:20.000ZCEAREX was a multi-platform field program conducted in the Norwegian Seas and Greenland north to Svalbard from September 1988 through May 1989. Canada, Denmark, France, Norway and the United States participated in the experiment. Primary data from CEAREX are available on FTP in ASCII format along with some data from the Marginal Ice Zone Experiment (MIZEX) and the Eurasian Basin Experiment (EUBEX). Meteorology data from CEAREX and the MIZEX (1983, 1984, 1987) include near-surface time series and rawinsonde (upper-air sounding) profiles of wind, pressure, temperature, and humidity collected on ship platforms and ice floe stations. A collection of hydrography data include CTD, STD, and bottle data from a ship and two operations camps. Hydrography data also include data from the MIZEX, the EUBEX, NODC archives, and a merged set of data from five other cruises. Sea ice data consist of compressive stress measurements made in a multi-year floe, stress sensor data for time series of stress invariants, and ice accelerometer data for movements associated with the deformation of multi-year ice floes. Noise data consist of acoustic measurements from a variety of hydrophone and geophone arrays, and ambient noise observations from a ship using omni-directional hydrophones tethered beneath the ice cover. Biophysical data include bottle sample, zooplankton sampling, and bioluminescence data. Bathymetry data consist of gridded trackline data collected from the two operations camps, and digital bottom bathymetry and continental topography data for the Fram Strait region and a portion of the Arctic Ocean. Sample position data consist of hourly listings of position and velocity for both manned stations and unmanned drifting buoys. Data are available via FTP.