Materials

Thermal Response of Ultra-High Molecular Weight Polyethylene (UHMWPE) Materials in a Flash Flame Test

Testing was performed on Ultra-High Molecular Weight Polyethylene (UHMWPE) fabric and composite material in a flash flame environment when protected by a flame-resistant (FR) fabric outer layer. UHMWPE material has excellent ballistic protection properties, but has generally not been considered for ballistic protection garments due to its low melting point. This research was conducted to determine if UHMWPE materials could be considered for use in the recently developed protective undergarment (PUG) if worn beneath an FR uniform.

Posted in: Briefs, Aerospace, Defense, Materials, Composite materials, Fabrics, Polymers, Thermal testing
Read More >>

Silicon Carbide Foam

Silicon carbide (SiC) foam from Goodfellow (Coraopolis, PA) provides the exceptional hardness, high-temperature durability and performance of solid silicon carbide, but in a lightweight foam structure. The matrix of cells and ligaments of silicon carbide foam is completely repeatable, regular and uniform throughout the material, yielding a rigid, highly porous and permeable structure with a controlled density of metal per unit volume. Characteristics of SiC foam include: exceptional hardness (Mohs 9) and resistance to wear and corrosion; can withstand temperatures up to 2200°C; high thermal and electrical conductivity; and low thermal expansion.

Silicon carbide foam is available from stock in a standard pore size of 24 pores per centimeter (60 ppi), with a bulk density of 0.29 g.cm-3, a porosity of 91% and a thickness of 10mm.

For Free Info Visit http://info.hotims.com/55588-510

Posted in: Products, Defense, Consumer Product Manufacturing, Materials
Read More >>

Titanium/Composites Brazing

Morgan Advanced Materials (Windsor, UK) announced that it now has the capability to braze carbon fiber, ceramics, composites, or other engineered materials directly to a titanium honeycomb. Carbon fiber and other similar non-metallic engineered materials have exceptional thermal conductivity capabilities, and are able to remain strong at temperatures exceeding 2000°F, far higher than those at which any metals retain their strength. Titanium honeycomb adds greater strength to the carbon fiber and eliminates fracturing issues by transferring forces from impact better than the carbon fiber alone. Both materials are exceedingly lightweight.

In addition, the strength of the braze bond is exceptional, equaling or exceeding the strength of each component material, unlike the reduced strength of adhesive, riveted, or other bonds. The addition of the titanium honeycomb to the carbon fiber allows easy joining of the titanium to other structures through traditional joining techniques.

For Free Info Visit http://info.hotims.com/55588-518

Posted in: Products, Defense, Consumer Product Manufacturing, Materials
Read More >>

Dry Drilling Composites Using Carbon Dioxide Cooling

Posted in: Articles, Aerospace, Defense, Composites, Drilling, Composite materials, Fasteners
Read More >>

Advancing the Use of Beryllium Bearing Materials for Unmanned Platforms

Aerospace and defense platforms are often regarded as the earliest adopters of new materials and processes technologies. Materials test programs provide validations of material supplier property claims, as the physical tests are performed and data is analyzed. Resultant material “design allowables” are developed and compared to the performance envelopes for the intended application(s). The quality of simulation software and the developed knowledge base that design and strength engineering personnel use for analyzing materials in the intended product design and environments have improved dramatically in the last decade. This has primarily been based on the efficiency and availability of computing capacity for complex simulations.

Posted in: Articles, Aerospace, Defense, Materials, Simulation Software, Test & Measurement, Beryllium alloys, Unmanned aerial vehicles
Read More >>

Unlocking the Power of Ceramic Matrix Composites

Faster, lighter, stronger, hotter – words anyone working on military product development is all too used to hearing. In a world where advanced computer modeling and simulation packages are helping engineers optimize new product designs to increase performance, oftentimes the limiting factors to meeting spec are the mechanical and thermal restrictions inherent to currently available engineering materials. Ceramic matrix composites, or CMCs, provide an entire world of new thermo-mechanical properties, allowing engineers the ability to unlock the potential of some of their most advanced high temperature and high speed designs.

Posted in: Articles, Aerospace, Defense, Ceramics, Composites, Materials, Ceramics, Composite materials, Military vehicles and equipment
Read More >>

Toho Tenax Develops 'Super-Heat-Resistant' Prepreg for Engine Apps

Toho Tenax Co., Ltd. announced Nov. 6 that it has developed a new prepreg — a carbon-fiber sheet pre-impregnated with matrix resin — that offers super-high-heat and -oxidation resistance suited to aircraft and automotive engine compartments.

Posted in: Technology Update, Aerospace, Defense, Materials, Composite materials, Fibers, Resins, Engines
Read More >>

Embedded Switch Fabrics

Mercury Systems, Inc. (Chelmsford, MA) has announced its Micro Via Radial Interconnect (MVRI) technology. MVRI improves OpenVPX™ switch fabric interconnect data rates by increasing the signal integrity margin approximately three-fold, enabling switch fabrics and point-to-point connections to run faster and more reliably. MVRI technology is scalable, enabling it to support signaling rates greater than 14 wGbaud per channel. Planned future fabric implementations, using InfiniBand enhanced data rate (EDR) or 100Gb Ethernet, especially benefit from the performance boost MVRI technology delivers. Intel® Xeon® server-class OpenVPX ecosystems in combination with the latest InfiniBand and Ethernet switch fabrics provide the embedded processing capability needed for challenging electronic warfare (EW) and C4ISR processing applications.

Posted in: Products, Aerospace, Defense, Electronics & Computers, Materials
Read More >>

Infusing Lightweight Composite Structures

European researchers examine simulation-based solutions for the manufacture of large-scale, liquid-resin-infusion composite substructures.

Liquid resin infusion (LRI) is a proven manufacturing technology for both small- and large-scale structures for which, in most cases, experience and limited prototype experimentation is sufficient to get a satisfactory design. However, large-scale aerospace and other vehicle structures require reproducible, high-quality, defect-free parts with excellent mechanical performance. These requirements necessitate precise control and knowledge of the preforming (draping and manufacture of the composite fabric preforms), their assembly, and the resin infusion.

Posted in: Articles, Aerospace, Defense, Composites, Materials, Forming, Composite materials, Lightweight materials, Resins
Read More >>

Continuous Sputter Deposition Coating of Long Monofilaments

A thin, uniform coating on long segments of monofilament could drastically improve the functionality of many complex fibers. A length of fishing line, microtubing, or polylactic acid (PLA) coated with copper could be left to cure within an epoxy, and upon removal of the monofilament, a narrow channel with a thin outer wall of copper would remain. That channel would be open for fluid flow, and also have a conductive shell. The “vascularized” material could be used for thermal management or self-healing composites.

Posted in: Briefs, Aerospace, Defense, Coatings & Adhesives, Materials, Thermal management, Adhesives and sealants, Coatings Colorants and Finishes, Copper, Fibers, Hoses
Read More >>