Teledyne Industries, Inc.

Oregon State University

John C Haygarth

Darryl D Amick

Lloyd J Fenwick

William A Crocker

John R Peterson

David R Lee

Hershel R Henson

Jon A Riesen

Larry K Seal

Arthur W Sleight

Sarit B Bhaduri

Kenneth C Ash

Lawrence J Jacoby

Kameswari Upadhyayula

Kent Wayne Storey

Robert S Yih

Donald Morris

Lawrence E Sarbeck

Claire E Closmann

Charles T Goodwin

A method for making negative thermal expansion materials having the formula

Solution method for making molybdate and tungstate negative thermal expansion materials and compounds made by the method

A mixed oxide ceramic product is made directly from a metal alloy of titanium, zirconium and/or hafnium and niobium, tantalum or hafnium, where the normally combustible alloy of titanium and zirconium or hafnium is passivated by the addition of more than about 7 atomic percent of niobium and/or tantalum and or vanadium which alloy can then be heated in air at atmospheric pressure to a temperature of from about 800 degrees C. to about 1500 degrees C. to produce an adherent monolithic ceramic containing product.

Composite article, alloy and method

Methods of making high specific gravity shotgun shot and small arms projectiles from melts containing primarily tungsten and iron, and particularly including specific melting temperature depressants and using specific quenching both compositions are described and specific conditions and materials and methods for making high specific gravity shot pellets and projectiles by powder metallurgical techniques are described.

Composite shots and methods of making

Shot pellet or small arms projectile comprises 40-60% by weight of tungsten and 60-40% by weight of iron formed by sintering tungsten containing powders having median particle sizes below 6 microns to form a material consisting primary of an intermetallic compound of tungsten and iron or of a metal matrix of iron surrounding tungsten containing particles.

Composite shot

Lead free shotshell pellets are disclosed which consist essentially of an alloy of iron and 30 to 46% by weight of tungsten. The shotshells may include a plurality of pellet sizes, and the pellets may be coated substantially uniformly with a polymeric coating, resin, or lubricant.

A process for separating a feed mixture of zirconium and petroleum coke containing traces amount of radioative materials by flotation process utilizing a plurality of flotation cells. The process comprises grinding the feed mixture, slurrying the ground feed mixture with water, treating the slurry with a flotation agent and a collector for the coke and subjecting the treated slurry to air sparging and agitation to create an overflow and an underflow. The overflow is then filtered to collect substantially zircon-free coke for further processing.

Method for separating coke from a feed mixture containing zirconium and

A process for separating zirconium values from hafnium values wherein an aqueous solution of ZrCl.sub.4 and HfCl.sub.4 is contacted with NH.sub.4 SCN, feeding the resultant solution into a solvent extraction system containing aqueous HCl and MIBK, separating off the solvent phase containing MIBK, HSCN, hafnium thiocyanate complex, and any decomposition products of HSCN to leave the aqueous phase raffinate containing NH.sub.4 Cl, zirconium oxide-chloride and low concentrations of HSCN, scrubbing the hafnium values from the separated solvent phase, treating the scrubbed solvent phase containing MIBK and HSCN with NH.sub.4 OH to convert the HSCN to NH.sub.4 SCN, separating the NH.sub.4 SCN from the treated solvent phase, treating the separated solvent phase to remove essentially all thiazolines, and scrubbing residual HSCN from the raffinate with the desulfurized solvent phase.

Zirconium-hafnium separation process

A process for the recovery of substantially pure zirconium values from zircon sand which also contains Ra, U, Hf, Pb and other metal values, comprising contacting zircon sand in a chlorinator with a chlorination medium to form an off-gas stream containing chlorides of Zr, Hf, Si, and tract U. The off-gas stream is passed to a condenser to remove volatile Si chlorides and thereby provide a product stream containing condensed chlorides of Zr, Hf and tract U, treating the product stream in acidic aqueous medium in a separation stage to separate the principal Hf values from the principal Zr values. Adjusting the pH of the resulting effluent to between about 3 to about 7 in a second stage to precipitate the trace U values. The residue stream is treated by

Zirconium-hafnium separation and purification process

Process for producing zirconium oxide blue-black coatings on zirconium alloy substrates by treating said alloys with molten salts containing small amounts of oxidizing compounds. The molten salts are sodium cyanide and combinations of sodium chloride and potassium chloride.

Growing community of inventors

Corvallis, OR, United States of America

John C Haygarth