Iowa State University Research Foundation Inc

Alan Mark Russell

Joel Lee Harringa

Bruce Allan Cook

Iver E Anderson

John D Verhoeven

Timothy W Ellis

Lawrence L Jones

Alan Paul Constant

Yun Tian

Andrew E Freichs

Palaniappa A Molian

Justin S Peters

S Bulent Biner

Hyong J Kim

Atiq Ahmed

A composite is provided having an electrically conducting Al matrix and elongated filaments comprising Ca and/or Sr and/or Ba disposed in the matrix and extending along a longitudinal axis of the composite. The filaments initially comprise Ca and/or Sr and/or Ba metal or alloy and then may be reacted with the Al matrix to form a strengthening intermetallic compound comprising Al and Ca and/or Sr and/or Ba. The composite is useful as a long-distance, high voltage power transmission conductor.

Aluminum/alkaline earth metal composites and method for producing

A highly wear resistant sintered, hot pressed, or otherwise compacted ceramic composite material is described, consisting of two discrete phases of the form AlMgBwhere x and y &#x2266;1 or like hard, orthorhombic compounds, and TiBor like Group IVB transition metal di-borides, and with an unexpectedly high content of transition metal di-boride in the range from 40 to 90 percent (28 to 85 volume percent).

Wear-resistant boride composites with high percentage of reinforcement phase

Performance and reliability of microelectromechanical system (MEMS) components enhanced dramatically through the incorporation of protective thin film coatings. Current-generation MEMS devices prepared by the LIGA technique employ transition metals such as Ni, Cu, Fe, or alloys thereof, and hence lack stability in oxidizing, corrosive, and/or high temperature environments. Fabrication of a superhard, self-lubricating coating based on a ternary boride compound AlMgBis described in this letter as a potential breakthrough in protective coating technology for LIGA microdevices. Nanoindentation tests show that hardness of AlMgBfilms prepared by pulsed laser deposition ranges from 45 GPa to 51 GPa, when deposited at room temperature and 573 K, respectively. Extremely low friction coefficients of 0.04-0.05, which are thought to result from a self-lubricating effect, have also been confirmed by nanoscratch tests on the AlMgBfilms. Transmission electron microscopy studies show that the as-deposited films are amorphous, regardless of substrate temperature; however, analysis of FTIR spectra suggests that the higher substrate temperature facilitates formation of the Bicosahedral framework, therefore leading to the higher hardness.

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A composite of M/AlMgBor M alloy/AlMgBis synthesized, where M=Al, Ti, W, or Cu. Small particles and/or fibers of AlMgBare distributed throughout a metal matrix to strengthen the resulting composite.

Ultra-hard boride-based metal matrix reinforcement

This invention relates to a ductile binder phase for use with AlMgBand other hard materials. The ductile binder phase, a cobalt-manganese alloy, is used in appropriate quantities to tailor good hardness and reasonable fracture toughness for hard materials so they can be used suitably in industrial machining and grinding applications.

Ductile binder phase for use with A1MgB14 and other hard materials

A ceramic material which is an orthorhombic boride of the general formula: AlMgB :X, with X being a doping agent. The ceramic is a superabrasive, and in most instances provides a hardness of 40 GPa or greater.

Superabrasive boride and a method of preparing the same by mechanical alloying and hot pressing

A ceramic material which is an orthorhombic boride of the general formula: AlMgB.sub.14 :X, with X being a doping agent. The ceramic is a superabrasive, and in most instances provides a hardness of 40 GPa or greater.

Superabrasive boride and a method of preparing the same by mechanical

A high strength, light weight 'in-situ' Ti-Y composite is produced by deformation processing a cast body having Ti and Y phase components distributed therein. The composite comprises elongated, ribbon-shaped Ti and Y phase components aligned along an axis of the deformed body.

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Ames, IA, United States of America

Alan Mark Russell