Refine Your Search

Topic

Author

Affiliation

Search Results

Journal Article

Aqueous Heat Reflective Coating for Engine Compartment Isolators

2014-06-30
2014-01-2082
Given these performance challenges, a heat reflective coating (HRC) has been developed as a cost effective alternative to perforated foils. HRC can be easily spray applied directly to the insulator surface and reduces the operating temperature of parts exposed to radiant heat. ...The thickness of this coating can be controlled to allow the insulator to maintain sound absorption performance. HRC has also been formulated as an aqueous coating to reduce environmental restrictions along with a flame retardant package to meet UL94-V0 requirements. ...HRC has also been formulated as an aqueous coating to reduce environmental restrictions along with a flame retardant package to meet UL94-V0 requirements.
Technical Paper

The Effect of Coating and Tightening Speed on the Torque-Tension Relationship in Threaded Fasteners

2006-04-03
2006-01-1252
This study investigates the effect of fastener coating, tightening speed, and repeated tightening on the torque-tension relationship, and on the coefficients of thread and underhead friction. ...Selected coatings provide three distinctly different levels of friction between threads and under the rotating fastener head; these coatings are assigned a low, medium, or high friction designation. ...Selected coatings provide three distinctly different levels of friction between threads and under the rotating fastener head; these coatings are assigned a low, medium, or high friction designation. Due to the fact that the torque-tension relationship is highly sensitive to normal variations in friction, the findings of this study would improve the reliability and safety of bolted assemblies, especially in critical applications.
Technical Paper

Investigation of the Effect of Adhesive Coating on the Performance of Threaded Fasteners

2007-04-16
2007-01-1671
This study investigates the effect of Teflon and adhesive coatings on the torque-tension relationship and the self-loosening performance of threaded fasteners. ...Two Teflon insulation coatings and one locking adhesive are considered. The torque-tension relationship is established for coated and uncoated fasteners for both tightening and loosening. ...A modified Junker machine is used to evaluate the self-loosening performance of fasteners with various coatings. Since the torque-tension relationship and the self-loosening performance of threaded fasteners are highly sensitive to the friction variables, the findings of this study would improve the reliability and safety of bolted assemblies, especially in critical applications.
Technical Paper

Influence of External Insulation and Coating Transparence on Thermal Regimes of Space Vehicle

1997-07-01
972546
The numerical/experimental method for, and results of, evaluating insulation solar radiation transmission effects on in-flight temperature field of a space vehicle are presented. The experiment subsection describes a new experimental method for evaluating materials solar-radiation transmittance, reflectance, and absorptance, as well as demonstrates test results for silica samples with various thicknesses. The calculation subsection includes (1) interpolation of the experimental data into a function of the insulation layer thickness and (2) the numerical solution of the transient heat conduction equation for a thermal protection fragment consisting of an insulation layer cemented to a metal plate. Fragment temperature calculation results for various near-Earth orbits and fibrous silica insulation layer thicknesses are presented. The results obtained show the essential influence of insulation solar-radiation transmission on space vehicle structure temperature in space flight.
Technical Paper

Optical Black Coating on Carbon Fiber Reinforced Composite Sandwich Structure with Aluminum Honeycomb Core for Satellites Applications

2022-05-26
2022-26-0029
In the light of the above, this paper focuses on the development of novel optical black coating on Carbon fiber reinforced composite sandwich structures with aluminum honeycomb core. A thin layer of Multi-Walled Carbon Nanotubes black coating was developed on the surfaces of Carbon fiber reinforced composite laminate of the sandwich structure using the Chemical Vapour Deposition technique, to provide a low reflective surface. ...A thin layer of Multi-Walled Carbon Nanotubes black coating was developed on the surfaces of Carbon fiber reinforced composite laminate of the sandwich structure using the Chemical Vapour Deposition technique, to provide a low reflective surface. ...The surface structures of the optical black coating are imaged using a scanning electron microscope to determine the diameter of Multi-Walled Carbon Nanotubes to evaluate the effects of the reflection based on the density of the optical black coating furthermore optical properties such as reflectance will be reported in this paper.
Standard

Coating of Fasteners Aluminum Filled, Ceramic Bonded Coating

2012-08-17
HISTORICAL
AMS2506D
This specification covers the requirements for application to fasteners of a corrosion and heat resistant aluminum coating material having a thermosetting inorganic binder and the properties of the finished coating.
Standard

COATING OF FASTENERS Aluminum Filled, Ceramic Bonded Coating

1981-07-01
HISTORICAL
AMS2506B
This specification covers the procedure for application to fasteners of a corrosion and heat resistant aluminum coating material having a thermosetting inorganic binder and the properties of the finished coating.
Standard

Polycarbonate Sheet and Parts Optical Grade, Coated

2011-11-07
CURRENT
AMS3614C
This specification covers an optical-quality, transparent, polycarbonate plastic, to which a hard protective surface coating has been applied, supplied in the form of flat sheet or formed parts made from flat sheet.
Technical Paper

FIBER METAL THERMAL BARRIER SYSTEMS FOR ADVANCED ENGINES

1984-04-01
840899
A thorough understanding of the engine environment and the response of the coating system to that environment is needed to design durable coatings for engine use....Strain isolated ceramic coating systems are being evaluated to apply ceramic thermal barriers to metal engine components.
Video

Corning Specialty Optical Fibers for Elevated Temperature Applications

2012-03-13
Corning Specialty Fiber Group developed new optical fibers with acrylate type coating materials for elevated temperature applications (up to +200C). Available single or dual coat designs, hermetic carbon coating, bend insensitive single-mode and multimode fiber glass designs expand application areas for fiber optics. ...Available single or dual coat designs, hermetic carbon coating, bend insensitive single-mode and multimode fiber glass designs expand application areas for fiber optics.
Standard

Bolts, Screws, and Nuts - External Wrenching, Metric Threads - Design Parameters for

2019-05-03
CURRENT
MA1518C
To fully define the following requirements for bolts with spline and hexagon heads of strength class up to but not including 1250 MPa: a Head dimensions (see 3.1) b Shank dimensions (see 3.2) c Geometric control (see 3.3) d Surface texture (see 3.4) This document is based on one class of thread after all processing, including coating or plating, has been completed as follows: tolerance class 4h6h. For particulars of thread, see AS1370. ...This document is based on the following classes of internal threads after all processing, including coating or plating, has been completed: Tolerance class 4H6H for sizes up to and including 5 mm Tolerance class 4H5H for size 6 mm and larger For particulars of thread, see AS1370.
Technical Paper

LIGHTNING PROTECTIVE COATINGS FOR BORON AND GRAPHITE FIBER REINFORCED PLASTICS

1970-02-01
700936
Coatings and thin conductive overlays for protecting boron fiber reinforced plastics and graphite fiber reinforced plastics from structural damage by simulated lightning strikes were investigated. ...Laboratory tests were made in which test panels, with and without coatings, were exposed to currents as high as 200,000 amperes. The greatest protection of the panels from damage, combined with minimum coating weight, was achieved with aluminum wire fabric and aluminum foil overlays. ...The greatest protection of the panels from damage, combined with minimum coating weight, was achieved with aluminum wire fabric and aluminum foil overlays. Other protective coatings which had merit were: plasma sprayed aluminum; conductive paints used with aluminum foil strips; and conductive coatings applied over high dielectric strength plastic films.
Technical Paper

Development of Interior Stain Removal Technology

2012-04-16
2012-01-0511
An analysis of the components of soiled stains revealed the presence of higher fatty acids that tend to adhere to the urethane coating on the surface of genuine leather seat covers and to the polyester fibers of cloth seat covers. ...An analysis of the components of soiled stains revealed the presence of higher fatty acids that tend to adhere to the urethane coating on the surface of genuine leather seat covers and to the polyester fibers of cloth seat covers. A coating technology was then developed for bringing dirt to the surface so that it can be easily removed by wiping with a wet cloth. ...This new coating provides the contradictory performance attributes of allowing easy removal of soiled stains by wiping with a wet cloth while simultaneously making it difficult for beverage stains to penetrate the seat fabric.
Technical Paper

Brillouin Active Fiber Structural Sensor for Aging Aircraft

1998-04-06
981218
Practical implementation issues to be addressed center on lowest SBS threshold for shortest possible fiber sensor length, fiber coating for protection, compatibility in bonding to aircraft structural material, and possible SBS sensitivity enhancement. ...Thin film shape memory alloys are to be explored as coating candidates. Fibers are also chemically engineered to provide distinct, spectrally shifted SBS lines for multi-point sensing purposes.
Technical Paper

Redesign of an Exhaust Manifold Outlet Fastener Using Robust Design Techniques

2000-03-06
2000-01-0917
It will be shown that significant interaction between stud out-of-round and fastener coating lead to improved stud performance when used with certain manifold materials while other thread features and fastener coating lead to other results. ...It will be shown that significant interaction between stud out-of-round and fastener coating lead to improved stud performance when used with certain manifold materials while other thread features and fastener coating lead to other results. The previously mentioned findings provided the necessary information to the redesign of the manifold outlet flange and joining fastener threads.
Journal Article

Development of Black Surface Treatment Applicable to Bolts for Motorcycles

2015-11-17
2015-32-0743
There is a method of coating a black chemical conversion film using trivalent chromium on the zinc-plated surface as one of the surface treatments that do not use the hexavalent chromium. ...Meanwhile, although the dip-coating using a black paint can provide a sufficient black color, it is necessary to apply coating two times to eliminate an irregular color. As a result, thick paint films are formed on the roots of thread, making it difficult to fit into the internal thread. ...Moreover, the adhesion was improved by the enhancement of anchor effect of coating with the elimination of finishing process of the black chemical conversion film, and the requested corrosion resistance was achieved.
X