Aluminum Company of America

William P Kampert

W Thomas Evans

Daniel J Boland

Larry F Wieserman

Girma Biresaw

Robert A Marra

David L Belitskus

Vince A Paola

Ronald L Abels

A method of forming fiber reinforced aluminum phosphate bonded material having improved strength at elevated temperatures. The method comprises the steps of: (a) preparing a slurry by blending alumina and aluminum phosphate solution, the slurry being substantially free of silica; (b) providing a fiber substrate coated with a metal selected from the group consisting of nickel, tungsten, molybdenum, platinum, copper, silver, gold, palladium, cobalt, chromium and titanium; (c) infiltrating the slurry into the fiber substrate; and (d) curing the infiltrated substrate to form a fiber reinforced aluminum phosphate bonded composite material. In a preferred embodiment of the present invention, the fiber substrate is made from SiC fibers and the refractory metal is electrolessly coated nickel.

Aluminum phosphate bonded fiber reinforced composite material containing

A recording medium comprising a substrate, a memory layer supported by the substrate, and a liquid crystal lubricant overlying the recording medium. The recording medium preferably has a wear layer over the memory layer. The liquid crystal lubricant comprises a cholesteric liquid crystal and cholestryl oleyl carbonate is particularly preferred. The lubricant may be applied to the recording medium by dipping in a dilute solution containing a volatile solvent and then evaporating the solvent, leaving a thin lubricant film over the wear layer.

Magnetic recording medium lubricated with a cholesteric liquid crystal

A process for producing a colored coating on aluminum comprises anodizing the aluminum at a voltage in the range of 6 to 24 volts in a sulfuric acid electrolyte and thereafter reducing the voltage to not greater than 3 volts while further anodizing the aluminum in the aforementioned electrolyte thereby producing the colored coating.

Color anodizing of aluminum

An improved process for metal plating on aluminum wherein a zinc immersion coating is applied to the aluminum to dissolve undesirable oxides on the aluminum surface. The improvement comprises a controlled dissolution of the zinc layer followed by immediate plating of the surface with another metal such as nickel. The dissolution of the zinc surface is monitored by immersing the zinc-coated aluminum, together with a nickel electrode, in an electrolytic bath and monitoring the electrode potential difference between the electrodes. The subsequent metal plating step is commenced when the electrode potential difference between the electrodes falls about 100-200 millivolts below the initial electrode potential difference at the particular temperature and bath composition.

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Lower Burrell, PA, United States of America

William P Kampert