A study was made of resins based on methyl-alpha-(D)-glucoside. Foams prepared using this resin and a prepolymer based on polymethylene polyphenyl isocyanate had excellent high temperature strength when tested At 400°F (301.1°C). Best results were obtained with methyl glucoside purchased as a 65-percent water solution containing 30 percent beta-methyl-glucoside.

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Round-wire, laminated flat cables provide an additional manufacturing capability that is particularly suited for development applications and few-of-a-kind production. These laminated cables do not require the special tooling that is necessary for molded cables; therefore, cost and lead time are reduced. Layup, lamination, and contouring techniques were developed for complex cable configurations, including small-radius bends and multiple breakouts.

Activities aimed at improving work directors which program the instructions required for fabricating printed wiring board assemblies included designing solid-state switching circuitry for improved reliability, evaluating interface cabling techniques, studying visual-aid display-lamp mounting, and packaging innovations for product interface and troubleshooting convenience. The prototype solid-state work director functions satisfactorily. Recommendations for the design and fabrication of future work directors include wire-wrapped terminal construction technique and use of light-emitting diodes to replace conventional incandescent lamps.

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Bendix now makes four component parts for one precision mechanical assembly from investment castings rather than from wrought-stock machined and welded assemblies--a conversion based directly on the cost saving potential. With proper evaluation of metal components for casting suitability and usage, manufacturers may realize cost saving far beyond their expectations.

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This report covers the work done to analyze the optical output of a Light Emitting Diode. This diode consists' of a Monsanto MV2 LED chip in an MV50 package. A calculator based instrumentation system is described including programming techniques used to reduce and display data. A Light Instrumentation System with specially designed fiber optic cables is described which gathers data for processing by the calculator based instrumentation system. Future work will include analysis of the RCA 8571 Photomultiplier Tube.

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A method has been developed for suppressing parasitic oscillation of transistors operating under test conditions through the use of ferrite cores and capacitors. The Hewlett-Packard Model 8554L spectrum analyzer is recommended for detecting unknown rf noise.

The first two phases of a program designed to determine the effects of boric acid on the cure of Y-3602 silicone gum were conducted to evaluate extraction solvents and extraction time. The standard production formulation of B10-filled Y-3602 silicone gum was used in these evaluations. Results showed that the best solvent for reproducibility and high amine content was chloroform. The second phase indicated that extraction was essentially complete at the end of 4 hours.

Smooth weld tip and anvil surfaces are recommended; electrical discharge machining (EDM) surface finishes damage weld materials. Copper-to-aluminum samples showed no weld degradation following environmental tests. Materials must be of similar hardness to achieve high quality welds, and soft materials are sensitive to machine parameter changes.

Mass anodization of tantalum-nitride films with sheet resistivities not exceeding 200 ohms per square to meet ±10-percent tolerance requirements on resistors above 100 ohms has been shown feasible. The anodization system that was developed for this study is capable of producing yields of approximately 80 percent under those conditiohs. Although anodization trimming on films with sheet resistivities as high as 600 ohms per square is now feasible, further work is necessary to successfully anodize films above 600 ohms per square and resistors below 100 ohms.

The mechanical, physical, and thermal properties of a glass microballoon-filled polybenzimidazole resin have been measured for test specimens molded by three manufacturing processes. The material, Imidite X386, has been shown to be a high strength, thermally stable structural foam.

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This work resulted in development of the necessary techniques to automatically measure radar receiver and system sensitivity. Both measurement speed and repeatability are improved over that possible by manual methods. Combined logic and analog techniques were used to derive a system suitable for both in-process and final-assembly tests on radar systems and rf subassemblies.

This report summarizes the generating unit capacity changes projected for 1979-1988 by the Regional Electric Reliability Councils in their April 1, 1979, Coordinated Long-Range Planning Reports to the Department of Energy.

A mechanical shock actuator has been converted into an air gun capable of firing 8-inch-·diameter (20.32 cm) projectiles to velocities exceeding 1000 fps (304.8 m/ s). This new capability has been used to study the effect of impact velocity upon the energy.absorbed by crushable materials. Shockpulse data is reduced by computer techniques and test results are displayed in either tabular or graphic format by use of the C DC 6600 Calcomp plotter.

The feasibility of using EN-7 as a substitute for Adiprene L100 curing agent for analyzer encapsulation was investigated. Since many analyzer assemblies cannot tolerate the usual EN-7 cure temperatures, this investigation was limited to a maximum cure temperatureof 710°C. The results of these tests indicate that a 20-hour cure at 490°C is adequate to provide sufficient hardness if followed by additional room-temperature cure.

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A light reflection technique suitable for development into an automated surface quality certification system was investigated to determine if reflected light intensity distributions could be corre]ated with surface defect depths. Reflected laser light intensity distributions from pit and scratch defects on highly reflective spheres were studied with a commercial multi-element photodetector. It was found that the intensity distributions --Goll'lf be correlated with depths of pits and scratches in a size range of concern on highly reflective' spheres.

Taking two resistance readings, at room temperature and at -196°C when the substrate is submerged in liquid nitrogen provides a convenient means of measuring the TCR of tantalum-nitride films. The liquid nitrogen provides a large, controlled temperature differential that can be used conveniently in the production environment. A digital-readout tester with only a simple nulling adjustment makes it possible to read the TCR of the film directly on the DVM indicator. This method provides the prompt TCR information feedback necessary to control the tantalum-nitride sputtering process and results in substantial time and materials savings.