Aluminum Company of America

Other

Aaron J Becker

Subodh K Das

Don R Careatti

Jan H Van Linden

Gerald E Carkin

Perry A Foster, Jr

G Edward Graddy, Jr

Stephen C Libby

Matthew A Spear

Matthew Spear

Light bar cover

The present invention relates to improved light bar cover for LED light bars. The presently disclosed light bar covers may cover the full circumference and length of a light bar and may include a multi-functional tool for easing the installation or removal. While installed, the light bar cover protects the light bar from various damages such as debris or the elements. The multi-function tool may be used to assist in the removal and installation of the cover when mounted in hard to access location. In various embodiments the multi-function tool may be used to deploy the cover, provide rigidity to the cover, and/or actuate a fastener for the cover.

Light bar cover and related methods

A container for a material, said container having a liner comprised of an equilibrated reaction product of the material. Preferably, the material is a molten aluminum-lithium alloy and the reaction product consists essentially of lithium aluminate. A method of making the container comprises shaping a substance into a vessel, said substance having sufficient porosity to react with the material and form a non-wetting reaction product without spalling; and introducing the material to the vessel. A method of making a container liner by applying a substance to the container inner surface and introducing the alloy to the inner surface is also disclosed.

Method of making a container

A process for production of ZrB.sub.2 powder in a molten salt bath by reaction of ZrCl.sub.4 or ZrCl.sub.2 with a boron halide and Al or Mg. In a preferred embodiment the salt bath comprises ZrCl.sub.4, KCl and NaCl maintained at a temperature of about 540.degree. to 660.degree. C. and solid Al powder is reacted with ZrCl.sub.4 and BCl.sub.3. The ZrB.sub.2 powder produced in a particularly preferred embodiment has a median particle size of about 1.1 microns, is equiaxed, and has only a single phase.

Production of zirconium diboride powder in a molten salt bath

A metal such as aluminum is produced by electrolysis of a compound of the metal in a solvent such as a molten salt. Electrolysis is carried out by passing a current from an anode to a cathode between which the solvent bath is situated. The cathode or cathode member is composed of a graphite substrate coated with a refractory hard metal such as titanium diboride. The coating adhesion of the TiB.sub.2 is improved through control of the manufacture and structure of the graphite substrate to favor a higher coefficient of thermal expansion and to have the density of the graphite fall within a range of 1.6 to 1.85 grams per cubic centimeter. The steps in producing the graphite may include working it so as to provide a grain direction. One embodiment includes aligning the refractory hard metal coated graphite in the electrolytic cell with the graphite grain direction parallel to the direction of current flow from anode to cathode. The refractory hard metal coating can be imparted by chemical vapor deposition and should exhibit a dense columnar structure which reduces penetration of the coating by molten aluminum.

Method of producing aluminum using graphite cathode coated with

Process for production of finely divided zirconium powder by reaction of solid magnesium with ZrCl.sub.4 in a molten salt bath maintained at a temperature below the melting point of magnesium. A preferred salt bath contains about 8 mole % ZrCl.sub.4 in an equimolar mixture of KCl and NaCl and is maintained at about 625.degree. C. Gaseous ZrCl.sub.4 and solid magnesium are continuously fed to a lower portion of the bath, the bath is continuously agitated, and bath containing MgCl.sub.2 is continuously removed. Zirconium powder recovered from the bath is generally spherical with a median particle size of about 2.2 .mu.m and is suitable for use in rapid rise time thermal batteries.

Continuous production of finely divided zirconium powder

A process for the production of aluminum chloride comprises providing a mixture of high purity activated carbon and alumina and bubbling chlorine gas therethrough, the mixture being kept at a temperature in the range of 500.degree. to 775.degree. C. Aluminum chloride is removed from the mixture as a vapor and condensed.

Aluminum chloride production

A low temperature method of producing boron trichloride comprises reacting an oxide of boron and a reducto-chlorinating agent in a molten bath comprising a combination of metal chlorides having a melting point of not more than 600.degree. C, to form boron trichloride, and recovering the boron trichloride by vaporization from the bath.

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Monroeville, PA, United States of America

Aaron J Becker