NASA Tech Briefs’ Materials Web page spotlights new engineering materials, coatings, and materials processing techniques, related primarily to ceramics, composites, plastics, and ferrous and non-ferrous metals, as published in NASA Tech Briefs magazine. The Tech Briefs describe applications of these materials in aerospace, defense, electronics, automotive, consumer products, and other major industries. Many of the Tech Briefs below are correlated to a Technical Support Package (TSP) or White Paper that can be downloaded free of charge.

Apr 2008

Gas Sensors Based on Coated and Doped Carbon Nanotubes

Large specific surface areas of nanotubes could enable attainment of high sensitivities.

Efforts are underway to develop inexpensive, low-power electronic sensors, based on single-walled carbon nanotubes (SWCNTs), for measuring part-per-million and part-per-billion of selected gases (small molecules) at room temperature. Chemically unmodified SWCNTs are mostly unresponsive to typical gases that one might wish to detect. However, ...
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Photochemically Synthesized Polyimides

Single monomers are polymerized by exposure to ultraviolet light, without heating.

An alternative to the conventional approach to synthesis of polyimides involves the use of single monomers that are amenable to photopolymerization. Heretofore, the synthesis of polyimides has involved multiple-monomer formulations and heating to temperatures that ...
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Hydroxide-Assisted Bonding of Ultra-Low-Expansion Glass

Preparation of bond surfaces is critical to success.

A process for hydroxide-assisted bonding has been developed as a means of joining optical components made of ultra-low-expansion (ULE) glass, while maintaining sufficiently precise alignment between. The process is intended mainly for use in applications in which (1...
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Optimized Carbonate and Ester-Based Li-Ion Electrolytes

This technology can be used in portable electronics, cell phones, and electric vehicles.

To maintain high conductivity in low temperatures, electrolyte co-solvents have been designed to have a high dielectric constant, low viscosity, adequate coordination behavior, and appropriate liquid ranges and salt solubilities. Electrolytes that contain ...
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Mar 2008
LiCoPO4 Cathode Layers for Thin-Film Batteries
High-Temperature SMAs for Actuator Applications
Feb 2008
Low-Pt-Content Anode Catalyst for Direct Methanol Fuel Cells
Atomized BaF2-CaF2 for Better-Flowing Plasma-Spray Feedstock
Nanophase Nickel-Zirconium Alloys for Fuel Cells
Jan 2008
SiO2/TiO2 Composite for Removing Hg From Combustion Exhaust
Lightweight Tanks for Storing Liquefied Natural Gas
Hybrid Wound Filaments for Greater Resistance to Impacts
Making High-Tensile-Strength Amalgam Components
Bonding by Hydroxide-Catalyzed Hydration and Dehydration
Dec 2007
CHEM-Based Self-Deploying Planetary Storage Tanks
Sequestration of Single-Walled Carbon Nanotubes in a Polymer
Foam Core Shielding for Spacecraft
Nov 2007
Modeling Metamaterials Leads to Advance in Cloaking System Prototype
Oct 2007
Strong, Lightweight, Porous Materials
Nanowicks
Lightweight Thermal Protection System for Atmospheric Entry
Sep 2007
Coating Thermoelectric Devices To Suppress Sublimation
Rapid Fabrication of Carbide Matrix/Carbon Fiber Composites
Ultrahigh-Temperature Ceramics
Improved C/SiC Ceramic Composites Made Using PIP
Coating Carbon Fibers With Platinum
Nanorod-Based Fast-Response Pressure-Sensitive Paints
Aug 2007
Photocatalytic/Magnetic Composite Particles
Jul 2007
Norbornene-Based Polymer Electrolytes for Lithium Cells
Making Single-Source Precursors of Ternary Semiconductors
Water-Free Proton-Conducting Membranes for Fuel Cells
Jun 2007
Glass/BNNT Composite for Sealing Solid Oxide Fuel Cells
Improved Single-Source Precursors for Solar-Cell Absorbers
Spray CVD for Making Solar-Cell Absorber Layers
Making Ternary Quantum Dots From Single-Source Precursors
May 2007
Increasing Durability of Flame-Sprayed Strain Gauges
Multifunctional, High-Temperature Nanocomposites
Multilayer Impregnated Fibrous Thermal Insulation Tiles
Apr 2007
Lithium Dinitramide as an Additive in Lithium Power Cells
Ion-Conducting Organic/Inorganic Polymers
Accounting for Uncertainties in Strengths of SiC MEMS Parts
MoO3 Cathodes for High-Temperature Lithium Thin-Film Cells
Mar 2007
Progressive Failure Analysis of Composite Structures with FEA Software
Feb 2007
Protective Skins for Aerogel Monoliths
Ceramic Paste for Patching High-Temperature Insulation
Fabrication of Polyimide-Matrix/Carbon and Boron-Fiber Tape
Jan 2007
Composite Elastic Skins for Shape-Changing Structures
Glass/Ceramic Composites for Sealing Solid Oxide Fuel Cells
Dec 2006
Carbon-Nanotube-Carpet Heat-Transfer Pads
Wholly Aromatic Ether-Imides as n-Type Semiconductors
Nov 2006
Making Activated Carbon by Wet Pressurized Pyrolysis
Composite Solid Electrolyte Containing Li+- Conducting Fibers
Electrically Conductive Anodized Aluminum Surfaces
Oct 2006
Thermoelectric Inhomogeneities in (Ag1–ySbTe2)x(PbTe)1–x
SiC Composite Turbine Vanes
Oxygen-Permeable, Hydrophobic Membranes of Silanized α-Al2O3
Sep 2006
Lower-Conductivity Ceramic Materials for Thermal-Barrier Coatings
Improving Thermomechanical Properties of SiC/SiC Composites
Patches for Repairing Ceramics and Ceramic Matrix Composites
4-Vinyl-1,3-Dioxolane-2-One as an Additive for Li-Ion Cells
Aerogel/Particle Composites for Thermoelectric Devices
Aug 2006
Vaporizable Scaffolds for Fabricating Thermoelectric Modules
Jul 2006
Stability Enhancement of Polymeric Sensing Films Using Fillers
Nanotube Dispersions Made With Charged Surfactant
Aerogels for Thermal Insulation of Thermoelectric Devices
Low-Density, Creep Resistant Single Crystal Superalloys
Wire-Mesh-Based Sorber for Removing Contaminants From Air
Jun 2006
Microsphere Insulation Panels
Tantalum-Based Ceramics for Refractory Composites
Single-Wall Carbon Nanotube Anodes for Lithium Cells
Oct 2005
Making Activated Carbon for Storing Gas
Corrosion-Prevention Capabilities of a Water-Borne, Silicone- Based, Primerless Coating
Sol-Gel Process for Making Pt-Ru Fuel-Cell Catalysts
Sep 2005
Low-Density, Aerogel-Filled Thermal- Insulation Tiles
High-Performance Polymers Having Low Melt Viscosities
Diamond-Coated Carbon Nanotubes for Efficient Field Emission
PETIs as High-Temperature Resin-Transfer-Molding Materials
Nonflammable, Hydrophobic Aerogel Composites for Insulation
Advanced Ablative Insulators and Methods of Making Them
Improved Anode Coatings for Direct Methanol Fuel Cells
Diamond-Coated Carbon Nanotubes for Efficient Field Emission
Aug 2005
Anhydrous Proton-Conducting Membranes for Fuel Cells
Glass Frit Filters for Collecting Metal
Jun 2005
Modifications of a Composite-Material Combustion Chamber
Development of Carbon-Nanotube/Polymer Composites
Multicomponent, Rare-Earth-Doped Thermal-Barrier Coatings
Reactive Additives for Phenylethynyl-Containing Resins
May 2005
Multifunctional Deployment Hinges Rigidified by Ultraviolet
Apr 2005
Multi-Layer Laminated Thin Films for Inflatable Structures
Nanostructured MnO2-Based Cathodes for Li-Ion/Polymer Cells
Mar 2005
Making Macroscopic Assemblies of Aligned Carbon Nanotubes
Formulating Precursors for Coating Metals and Ceramics
Feb 2005
Photocatalytic Coats in Glass Drinking-Water Bottles
Isogrid Membranes for Precise, Singly Curved Reflectors
Nickel-Tin Electrode Materials for Nonaqueous Li-Ion Cells
Patched Off-Axis Bending/Twisting Actuators for Thin Mirrors
Jan 2005
Molybdate Coatings for Protecting Aluminum Against Corrosion
Synthesizing Diamond From Liquid Feedstock
Modifying Silicates for Better Dispersion in Nanocomposites
Dec 2004
Better End-Cap Processing for Oxidation-Resistant Polyimides
Amplifying Electrochemical Indicators
Precious-Metal Salt Coatings for Detecting Hydrazines
Nanocarpets for Trapping Microscopic Particles
Nov 2004
Treated Carbon Nanofibers for Storing Energy in Aqueous KOH
New Material for Surface-Enhanced Raman Spectroscopy
Oct 2004
Using Iron To Treat Chlorohydrocarbon Contaminated Soil
Sep 2004
Brazing SiC/SiC Composites to Metals
Composite-Material Tanks With Chemically Resistant Liners
Improved BN Coatings on SiC Fibers in SiC Matrices
Aug 2004
Fuels Containing Methane or Natural Gas in Solution
Direct Electrolytic Deposition of Mats of MnxOy Nanowires
Personal Radiation Protection System
Jul 2004
Improved Method of Purifying Carbon Nanotubes
Patterned Growth of Carbon Nanotubes or Nanofibers
Lightweight, Rack-Mountable Composite Cold Plate/Shelves
Jun 2004
Electrodeionization Using Microseparated Bipolar Membranes
Safer Electrolytes for Lithium-Ion Cells
May 2004
Curing Composite Materials Using Lower-Energy Electron Beams
Aluminum-Alloy-Matrix/Alumina-Reinforcement Composites
Fibrous-Ceramic/Aerogel Composite Insulating Tiles
Urethane/Silicone Adhesives for Bonding Flexing Metal Parts
Mar 2004
Elastomer Filled With Single-Wall Carbon Nanotubes
Study of Rapid-Regression Liquefying Hybrid Rocket Fuels
Feb 2004
Liquid-Crystal Thermosets, a New Generation of High-Performance Liquid-Crystal Polymers
Reproducible Growth of High-Quality Cubic-SiC Layers
Nonlinear Thermoelastic Model for SMAs and SMA Hybrid
Formulations for Stronger Solid Oxide Fuel-Cell Electrolytes
Jan 2004
Making Carbon-Nanotube Arrays Using Block Polymers: Part II
Dec 2003
Processable Polyimides Containing APB and Reactive End Caps
Rod/Coil Block Copolyimides for Ion-Conducting Membranes
Liquid Coatings for Reducing Corrosion of Steel in Concrete
Less-Toxic Coatings for Inhibiting Corrosion of Aluminum
Organic/Inorganic Hybrid Polymer/Clay Nanocomposites
Oct 2003
Environmentally Safer, Less Toxic Fire-Extinguishing Agents
Switching and Rectification in Carbon-Nanotube Junctions
Scandia-and-Yttria-Stabilized Zirconia for Thermal Barriers
Multiaxial Temperature- and Time-Dependent Failure Model
Sep 2003
Oxide Protective Coats for Ir/Re Rocket Combustion Chambers
Simplified Waterproofing of Aerogels
Improved Thermal-Insulation Systems for Low Temperatures
Aug 2003
Burn-Resistant, Strong Metal-Matrix Composites
Better VPS Fabrication of Crucibles and Furnace Cartridges
Antistatic Polycarbonate/Copper Oxide Composite
Stable, Thermally Conductive Fillers for Bolted Joints
Jul 2003
Shields for Enhanced Protection Against High-Speed Debris
Transparent Metal-Salt-Filled Polymeric Radiation Shields
Meshed-Pumpkin Super-Pressure Balloon Design
Corrosion Inhibitors as Penetrant Dyes for Radiography
Explicit Pore Pressure Material Model in Carbon-Cloth Phenolic
Jun 2003
Flexible Composite-Material Pressure Vessel
Lower-Conductivity Thermal-Barrier Coatings
Process for Smoothing an Si Substrate After Etching of SiO2
Treatment To Destroy Chloro-hydrocarbon Liquids in the Ground
May 2003
Perovskite Superlattices as Tunable Microwave Devices
Apr 2003
Reliability and Design Considerations for Long Life Using Mica Capacitors in High-Voltage Apps
Mar 2003
Annealing Would Improve β" — Alumina Solid Electrolyte
Low-Power RIE of SiO2 in CHF3 To Obtain Steep Sidewalls
Feb 2003
Process for Encapsulating Protein Crystals
Mixed Conducting Electrodes for Better AMTEC Cells
Jan 2003
Advancements in Technology for Controlling Fiber Orientation in Composite Parts
Low-EC-Content Electrolytes for Low-Temperature Li-Ion Cells
Alkaline Capacitors Based on Nitride Nanoparticles
Dec 2002
Polymer Electrolytes for Rechargeable Lithium Batteries
Aug 2002
Internal-Combustion Engines With Ringless Carbon Pistons
Jun 2001
Filled Skutterudites as Thermoelectric Materials
Nov 2000
Polyaniline Compounds for Protection Against Corrosion
Sep 1999
Electrodialysis To Remove Ammonium Ions From Wastewater
Jul 1999
Separating Ethanol From Water Via Differential Miscibility
Jan 1999
Composite-Matrix Regenerators for Stirling Engines
May 1998
Advanced Cryogenic Insulation System for Graphite/Organic Resin Composite Cryogenic-Tank Structures

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