Super-Strong 'Glassy Carbon' is Elastic and Electric

A new compressed form of glassy carbon opens up possibilities for applications requiring low weight and high strength — from aerospace parts to football helmets.

Posted in: News, News, Ceramics
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The Innovative Future of Brazing

Join Morgan Advanced Materials for a 30-minute Webinar to learn more about new innovations in brazing technology.

Posted in: On-Demand Webinars, Materials
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Products of Tomorrow: June 2017

This column presents technologies that have applications in commercial areas, possibly creating the products of tomorrow. To learn more about each technology, see the contact information provided for that innovation.

Posted in: Articles, Electronics, Materials, Plastics, Additive manufacturing, Elastomers, Materials properties, Plastics, Semiconductors
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Combination Structural Support and Thermal Protection System

Applications include engine firewalls in general aviation aircraft, turbine engines, automobiles, or other ground vehicles; and in building construction for fire protection.

NASA's Langley Research Center has developed a system that provides both structural support and protection attributes in a failsafe manner. This innovation incorporates the use of a pre-ceramic polymer (PCP) composite structure that when overheated or exposed to fire or plasma will convert to a ceramic matrix composite (CMC), retaining structural integrity and still functioning effectively. When damage causes the thermal protection system (TPS) to fail, the underlying PCP structure converts to a CMC material that has high-temperature structural properties, will not catch fire or melt, and continues to perform its structural function.

Posted in: Briefs, Materials, Ceramics, Composite materials, Heat resistant materials, Polymers, Reliability, Reliability
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Composite Insulated Conductor

These extreme fire-resistant insulation systems show promise for use in high-voltage, high-power systems.

NASA's Langley Research Center has developed a new class of polyimide composite electrical insulation materials for wires, cable, and bus pipe. These new insulation materials have been shown to withstand a 12-hour gas flame test while maintaining structural and electrical circuit integrities. These extreme fire-resistant insulation systems show promise for use in high-voltage, high-power systems. They can improve survivability and continuity of the electrical power supply. Besides fire resistance, these materials also provide weight and space savings because of their lightweight nature and exceptionally high-performance capability. NASA developed the wire insulation for exploration and space operations; however, the technology also has applicability to other high-voltage, high-power systems for maritime, high-rise building construction, and other industries.

Posted in: Briefs, Materials, Electric cables, Wiring, Electric cables, Wiring, Composite materials, Insulation, Durability, Durability
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Multifunctional Platelet Composites for Tin Whisker Mitigation

Applications include consumer electronics, automotive, and electronic weapons systems.

To comply with the Restriction of Hazardous Substances (RoHS) directive, pure tin is replacing lead-tin alloys in commercial electronic devices. Unfortunately, tin can grow whiskers that can lead to electrical short circuits or metal vapor arcing, both of which threaten the long-term reliability of electronic systems, and cause critical systems to fail catastrophically. A current method of whisker mitigation utilizes coatings based on glassy or rubbery unfilled polymers; such coatings are not impenetrable to tin whiskers.

Posted in: Briefs, Materials, Electronic equipment, Electronic equipment, Coatings Colorants and Finishes, Coatings, colorants, and finishes, Composite materials, Tin alloys
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Electrically Conductive, Optically Transparent Polymer/Carbon Nanotube Composites

A templated growth process provides uniform-sized carbon nanotubes.

NASA's Langley Research Center researchers have developed a novel method for making carbon nanotubes that are very uniform in size. A template is used to guide the carbon nanotube growth so that all nanotubes are uniform in size. The carbon nanotubes can be used as-grown, uniformly dispersed, and aligned within the template or isolated from the template for use as carbon nanotubes. The solution-based process uses sugar as a carbon source, does not require vacuum, and is thus simple and low-cost in nature.

Posted in: Briefs, Materials, Fabrication, Composite materials, Conductivity, Nanomaterials
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Space Vehicle Heat Shield Having Edgewise Strips of Ablative Material

Edgewise strips of PICA ablator eliminate gaps in the capsule heat shield.

An alternate heat shield concept for the Orion space vehicle is to use interlocking blocks of Phenolic Impregnated Carbon Ablator (PICA). The blocks are independent from one another and there is a defined gap inches between the blocks. That gap poses serious problems to the vehicle and crew if gases flow between the PICA blocks. This invention is a simple yet robust invention for PICA block gap filler. Strips of preconditioned PICA blocks are positioned edgewise to fill gaps between PICA blocks to provide a gap filler substance that allows thermal expansion, and satisfies mechanical strain between the PICA tiles and substructure.

Posted in: Briefs, Materials, Thermal management, Thermal management, Product development, Insulation, Spacecraft
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Mechanically Strong, Thermally Stable, and Electrically Conductive Nanocomposite Structure and Method of Fabricating Same

This technology can be used in automobiles, launch vehicles, advanced aerospace vehicles, aircraft, and spacecraft.

NASA's Langley Research Center has developed a method for producing multifunctional, structural, thermally stable nanocomposites with aligned carbon nanotubes. The invention improves upon current state-of-the-art graphite fiber composites by providing the same lightweight and mechanically strong characteristics, but also adds thermal stability and electrical conductivity. Thus, the invention can be used to provide a new class of mechanically strong, thermally stable, and electrically conductive nanocomposites.

Posted in: Briefs, Materials, Fabrication, Composite materials, Graphite, Materials properties, Nanomaterials
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Improved Cast Stainless Steel Alloys

Applications include chemical/petrochemical production systems, gas turbine engines, and high-performance alloys.

At high temperatures, currently available cast stainless steel alloys used for engine component applications do not have the long-term stability of their original castings, and are lacking in their ability to resist deformation and cracking from extreme temperature changes. There is a need for high-strength, oxidation-resistant, and crack-resistant cast alloys for use in internal combustion engine components such as exhaust manifolds and turbocharger housings, gas-turbine engine components such as combustor housings, and other components that must function in extreme environments for prolonged periods of time.

Posted in: Briefs, Materials, Casting, Advanced high-strength steels, Alloys, High-strength low-alloy steel, Engine components, Durability, Durability
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