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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 1,045 records · Page 58

All sources NASA NTRS DOE OSTI

NASA NTRS1962

Development of techniques for forming segments of a parabolic solar concentrator

This report covers a comprehensive research study of Androforming, explosive forming, and stretch forming as applied to shaping a parabolic reflector segment for use in a solar furnace. Development efforts were directed toward attaining accurate part contour, and assurance of process reproducibility. The three forming processes mentioned above were investigated by qualified contractors. Three test segments formed by each method along with a detailed analysis were submitted to MSFC. It was concluded that optimum results could be obtained with the stretch forming process. The three test segments of the solar concentrator tha.t were produced by this method, and evaluated optically, revealed a maximum contour deviation of O. 76 degrees.

P.H. Schuerer↗

NASA NTRS1969

Isothermal drop calorimeter provides measurements for alpha active, pyrophoric materials

Isothermal drop calorimeter measures the heat content of intensely alpha active and pyrophoric materials in inert atmospheres. It consists of a furnace, calorimeter, and aluminum isothermal jacket contained within an inert-atmosphere glove box, which permits the use of unencapsulated materials without exposing personnel to alpha contamination.

Savage, H.↗

NASA NTRS1968

Rubidium-strontium age of hypersthene

Rubidium, Sr and Sr isotopic composition of normal gray hypersthene chondrite falls, noting Rb/Sr and Sr87/Sr86 ratio determination of Bath Furnace L chondrite isochron

Gopalan, K.↗

NASA NTRS1970

Low-cost high-temperature brazing material

Commercially available nickel-copper wire containing 6 and 12 percent nickel is used in high temperature furnace brazing of rocket engine parts. Brazed joints have properties comparable to or better than those brazed with more expensive materials, and cost savings are substantial.

Repas, G. A.↗

NASA NTRS1970

Improved method for cladding the inside of metal tubes

Creep characteristics of molybdenum at high temperature and stress are utilized to compress tungsten foil liner against inner surface of tantalum alloy cylinder to form bond at interface. Temperature and pressure can be accurately controlled and size of workpiece is limited only by furnace size.

Maag, W. L.↗

NASA NTRS1969

Technical applications of high temperature coatings

High temperature coatings in industrial, military and space applications, noting use in metal melting and working, furnace protection, propulsion systems, rocket engines, etc

Grisaffe, S. J.↗

NASA NTRS1970

Industrial chemistry in space

Parabolic solar furnace for chemical manufacture of impurity sensitive materials in orbiting spacecraft

Libby, W. F.↗

NASA NTRS1971

Improved fire-resistant coatings

Water-base coatings containing potassium silicate show improvement in areas of quick air-drying, crack, craze, and abrasion resistance, adherence, and leach resistance. Coatings are useful as thermal-barrier layers in furnaces, and as general purpose fire resistant surfaces where vapor impermeability is not a requirement.

Hutt, J. B.↗

NASA NTRS1971

Durable cathodes for high-power inert-gas arcs

Cathode design minimizes evaporation of electrode material which may deposit on associated optical surfaces. It also results in stable operation and precise positioning of arc relative to optical collector. Innovation applies to high power light sources and to arcs used in industrial furnaces.

Decker, A. J.↗

NASA NTRS1970

Analytical studies of in-reactor tests of a nuclear light bulb unit cell

Analytical studies of in-reactor tests of nuclear light bulb unit cell using Pewee, nuclear furnace, and high flux isotope reactors

Bauer, H. E.↗

NASA NTRS1970

High temperature lens construction Patent

Lens assembly for solar furnace or solar simulator

Lorell, K. R.↗

NASA NTRS1971

Observations on the cyclic and isothermal oxidation of WI-52 and IN-100

Oxidation resistance determined for cobalt and nickel based alloys by isothermal and cyclic tests in static furnace air

Deadmore, D. L.↗

NASA NTRS1968

Thermal radiation shielding Patent

Development and characteristics of thermal radiation shielding of refractory metal foil used for induction furnace

Ebihara, B. T.↗

NASA NTRS1971

Practical method for diffusion welding of steel plate in air

Development of method of diffusion welding steel butt joints in air without vacuum furnace or hot press

Holko, K. H.↗

NASA NTRS1972

Simple, reproducible methods for thermal shock testing of brittle materials

Technique requires radio frequency induction power source, induction furnace and good vacuum system to induce brittle material thermal shock testing.

Rowley, J. C.↗

NASA NTRS1972

Improved method for producing metal-reinforced ceramics

Vacuum impregnation process produces metal-reinforced ceramics with only 3 percent void space volumes. Method may be used to produce metal-reinforced ceramics for high temperature or structural applications such as furnace supports and armor.

Landingham, R. L.↗

NASA NTRS1972

A protective coating for stainless steel

Comparative furnace oxidation tests prove that coating provides high temperature oxidation and erosion resistance.

Grisaffe, S. J.↗

NASA NTRS1972

Study of hot hardness characteristics of tool steels

Hardness measurements of tool steel materials in electric furnace at elevated temperatures and low oxygen environment are discussed. Development of equation to predict short term hardness as function of intial room temperature hardness of steel is reported. Types of steel involved in the process are identified.

Chevalier, J. L.↗