University of California

Other

Lawrence Livermore National Security, LLC

US Government as Represented by the Secretary of the Army

Massachusetts Institute of Technology

Sandia Corporation

National Technology & Engineering Solutions of Sandia, LLC

Perpetual Technologies

Enrique J Lavernia

Joseph Collin Farmer

Craig A Blue

John Harry Perepezko

Jeffery J Haslam

Nancy Yuan Yang

Larry Kaufman

Robert Bayles

Julie M Schoenung

Frank M G Wong

Arthur H Heuer

Louis F Aprigliano

Todd Monson

Olivia A Graeve

Sumner Daniel Day

Baolong Zheng

Yizhang Zhou

Leo Ajdelsztajn

Xiaoyan (Jane) Ji

John D K Rivard

Leslie K Kohler

Edward J Lemieux

Zhihui Zhang

Robert C O'Handley

Deepak Kapoor

Nicholas J Grant

Christopher D Haines

Virgil Provenzano

George E Kim

Yutaka Hara

Joseph Paras

Teiichi Ando

Tetsuji Harada

Ying Li

Troy Topping

Leonardo Ajdelsztajn

Rustin Vogt

A method of forming a consolidated component having a complex shape includes providing a first component having a first shape similar to the complex shape. The method further includes placing the first component in a chamber and surrounding the first component with a medium. The method further includes applying pressure and at least one of heat or electricity into the chamber to process the first component to form a consolidated component having the complex shape.

Isostatic pressure spark plasma sintering (IP-SPS) net shaping of components using nanostructured materials

Bulk iron nitride can be synthesized from iron nitride powder by spark plasma sintering. The iron nitride can be spark plasma sintered at a temperature of less than 600&#xb0; C. and a pressure of less than 600 MPa, with 400 MPa or less most often being sufficient. High pressure SPS can consolidate dense iron nitrides at a lower temperature to avoid decomposition. The higher pressure and lower temperature of spark discharge sintering avoids decomposition and limits grain growth, enabling enhanced magnetic properties. The method can further comprise synthesis of nanocrystalline iron nitride powders using two-step reactive milling prior to high-pressure spark discharge sintering.

Method to synthesize bulk iron nitride

A non-faceted nanoparticle reinforced metal matrix composite having increased ductility, while maintaining strength. In particular, a non-faceted nanoparticle reinforced metal matrix composite is provided comprised of spherical or ellipsoidal shaped (non-faceted) nanoparticles comprising one or more of boron carbide, titanium diboride, silicon nitride, alumina and boron nitride, and a nanostructured matrix composite comprised of one or more metals and/or metal alloys. In addition, a method of manufacturing such a non-faceted nanoparticle reinforced metal matrix composite is provided.

Non-faceted nanoparticle reinforced metal matrix composite and method of manufacturing the same

A system for coating a surface comprises providing a source of amorphous metal, providing ceramic particles, and applying the amorphous metal and the ceramic particles to the surface by a spray. The coating comprises a composite material made of amorphous metal that contains one or more of the following elements in the specified range of composition: yttrium (&#x2267;1 atomic %), chromium (14 to 18 atomic %), molybdenum (&#x2267;7 atomic %), tungsten (&#x2267;1 atomic %), boron (&#x2266;5 atomic %), or carbon (&#x2267;4 atomic %).

Corrosion resistant amorphous metals and methods of forming corrosion resistant amorphous metals

A method of coating a surface comprising providing a source of amorphous metal that contains manganese (1 to 3 atomic %), yttrium (0.1 to 10 atomic %), and silicon (0.3 to 3.1 atomic %) in the range of composition given in parentheses; and that contains the following elements in the specified range of composition given in parentheses: chromium (15 to 20 atomic %), molybdenum (2 to 15 atomic %), tungsten (1 to 3 atomic %), boron (5 to 16 atomic %), carbon (3 to 16 atomic %), and the balance iron; and applying said amorphous metal to the surface by a spray.

Compositions of corrosion-resistant Fe-based amorphous metals suitable for producing thermal spray coatings

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

Spray atomization of molten metal and/or intermetallic matrix composites reinforced with ceramic particles is practiced by atomizing the matrix into micron sized droplets and depositing the semisolid droplets in a bulk deposition upon a temperature controlled substrate. The semiliquid droplets are injected with refinement particles while in a range of 0 to 40% by volume solid phase and deposited on the substrate surface while in a 40 to 90% by volume solid phase. Refined grain morphology, increased solid solubility, nonequilibrium phases, absence of macro segregation, and elimination of the need to handle fine reactive particles are all achieved by performing the spray deposition process under a controlled atmosphere. Materials fabricated by the process exhibit unusual combinations of properties, such as spatially varying properties.

Spray formed multifunctional materials

Nanocrystalline coating are prepared using a two step approach. First, the grain size of: micrometer sized powders is reduced to nanometer dimensions using high energy ball milling. This is undertaken using attritor mills. Second, the nanocrystalline powders are dried and introduced into the high velocity oxygen fuel (HVOF) process and produce a coating with refined microstructure. The finished coating can be several mm in thickness. In addition a three dimensional device can be spray formed.

Method for thermal spraying of nanocrystalline coatings and materials

Bulk rapidly solidified magnetic materials having a density of greater than 90%, a thickness of at least 250 microns, and preferably a low oxygen content, are produced by a liquid dynamic compaction process which, depending upon the chosen operating conditions, can yield materials ranging from crystalline to partially crystalline to amorphous. The materials so produced are directly useful, i.e. without having to be reduced to a powder and consolidated into a shape, to produce permanent magnets. When the materials are amorphous, they can be directly used as soft magnetic materials and for other purposes

Bulk rapidly solifidied magnetic materials

Growing community of inventors

Davis, CA, United States of America

Enrique J Lavernia