University of California

Mogas Industries, Inc.

Perpetual Technologies

F.w. Gartner Thermal Spraying Company

George E Kim

Enrique J Lavernia

John B Williams, Jr

Virgil Provenzano

Julie M Schoenung

Jimmy Walker, Jr

Leonardo Ajdelsztajn

Jimmy Jr Walker

John B Williams

The oxidation behavior of the bond coat is improved using a HVOF nanostructured NiCrAlY coating. NiCrAlY powder is mechanically cryomilled and HVOF sprayed onto Ni-based alloy to form a nanocrystalline bond coat. Oxidation is performed on the coating to form the thermally grown oxide layer (thermally grown oxide). After heat treatment at 1000&#xb0; C. for 24 and 95 hour, a homogeneous &#x3b1;-AlOlayer is formed on top of the bond coat. The nanostructured characteristic of the coating and the presence of AlOwithin the cryomilled powders (oxidation occurred during cryomilling process) affects the nucleation of the alumina layer on the top of the coating. The formation of a continuous thermally grown oxide layer protects the coating from further oxidation and avoids the formation of mixed oxide protrusions, such as those presented in the coating sprayed using the as-received powder.

Functional coatings for the reduction of oxygen permeation and stress and method of forming the same

A ball valve for use in the pressure acid leaching of nickel ores is disclosed. The valve has a valve body and a ball centrally positioned in the valve body, which has a central passage rotatable in the valve body between open and closed positions. At least one seat is disposed between the ball and the valve body. The ball and seat each comprise a titanium substrate and an ultrafine or nanostructured titania coating. The titania can include from 5 to 45 volume percent of a second phase material that is immiscible with the titania and exhibits corrosion resistance.

Nanostructured titania coated titanium

Growing community of inventors

CA

George E Kim