Hood & Co., Inc.

Other

Anthony J Izbicki

William J Davis

Frederick B Wagner, Iii

Jean Charles Bonnel

Michael Anthony Perricci

Stanley M Golemo, Jr

A composite material and a method of making a composite material is disclosed. The composite comprises a core of a precipitation hardenable metal having a coefficient of thermal expansion less than 9 parts per million/&deg; C. in the temperature range of 20&deg; C. to 100&deg; C. The core material is clad with a transition metal or transition metal alloy cladding layer covering at least one surface of the core.

Composite metals and method of making

A high energy propellant or explosive charge is prepared by compacting a normally pulverulent secondary high explosive, such as HMX or RDX, and retaining the pulverulent material packed as a coherent mass by means of a bridging agent capable of hydrogen bonding with the secondary explosive. The bridging agents used in this invention are characterized in their ability to hydrogen bond to the secondary explosive, their comparatively high intrinsic density, their solubility in a polar solvent, and their stereo compatibility with the secondary high explosive. The bridging agents are also characterized by the presence of at least two sites for hydrogen bonding comprised of hydroxyl or, carboxyl groups.

High energy propellant

Thermostat metals combining properties of relatively high flexivity and good corrosion resistance are prepared by metalurgically bonding a corrosion resistant high expansive alloy (1) to a less corrosion resistant low expansive alloy (2) and capping the low expansive alloy (2) with a corrosion resistant, moderately low expansive alloy (3) of similar hardness to that of the low expansive alloy (2). The preferred high expansive alloy (1) is comprised of about 18 wt. % Ni; 11 wt. % Cr; and balance Fe. The preferred low expansive alloy (2) is Invar (36 wt. % Ni; balance Fe). The preferred corrosion resistant low expansive alloy (3) is comprised of about 20 wt. % Ni; 26 wt. % Co; 7 wt. % Cr; balance Fe. The preferred volumetric ratios of the metals is about 50% of the high expansive alloy (1), 30 to 40% of the low expansive metal (2) and 10 to 20% of the corrosion resistant low expansive alloy.

Corrosion resistant thermostat metal compositions

A composite thermostat metal (bimetal) is disclosed in which a layer of strain hardenable aluminum is bonded to a layer of metal of relatively low coefficient of thermal expansion.

Aluminum thermostat metal

The surface of manganese alloys is protected from corrosion by directly exchanging the manganese on the surface of the alloy with a more noble metal, such as nickel, by intrinsic voltaic couple deposition. The invention finds particular utility in protecting manganese alloys from corrosion when used as a thermostat metal.

Corrosion inhibited manganese alloys in thermal metals

Thermostat metal compositions are disclosed which have a substantially uniform flexivity over a broad range of operating temperatures and which respond rapidly to changes in ambient temperatures. These results are achieved by using, as an intermediate layer, a major portion by volume of a thermostat metal that has a thermal conductivity in excess of 2,400 BTU in/ft.sup.2 hr.degree. F.

Thermostat metal compositions

Polymeric bodies having selected morphological properties are prepared by effecting an apparent increase in the glass transition temperature of the polymer to cause it to become glassy and manipulating the polymer while it is in the glassy state. In the preferred practice of the invention, the apparent increase in the glass transition temperature is a reversible function so that after the morphological properties of the polymer have been developed, the normal glass transition temperature of the polymer may be restored. The process of this invention finds utility in the preparation and formulation of polymers in powdered form; it provides a practical method for the formation of powders in unusual size ranges, which, in turn, makes possible the formation of shaped articles by novel processes; and it provides a simple method for making products, such as open-cell foams and surfaces in relief, that have unique physical characteristics.

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Reading, PA, United States of America

Anthony J Izbicki