Joel Lee Harringa

US Patent:

6432855, Aug 13, 2002

Filed:

May 23, 2000

Appl. No.:

09/576674

Inventors:

Bruce A. Cook - Ankeny IA
Joel L. Harringa - Ames IA
Alan M. Russell - Ames IA

Assignee:

Iowa State University Reseach Foundation, Inc,. - Ames IA

International Classification:

C04B 3558

US Classification:

501 963, 501 964, 501 984, 501 971, 501 972, 501 973, 501 985, 264299, 264319

Abstract:

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.

US Patent:

6921422, Jul 26, 2005

Filed:

Sep 23, 2003

Appl. No.:

10/669183

Inventors:

Bruce A. Cook - Ankeny IA, US
Alan Russell - Ames IA, US
Joel Harringa - Ames IA, US

Assignee:

Iowa State University Research Foundation, Inc. - Ames IA

International Classification:

C22C029/00
C22C029/14
C09K003/14

US Classification:

51307, 51308, 51309, 75235, 75236, 75240, 75230, 419 10, 419 12, 419 13, 419 14, 419 19, 420434, 420435

Abstract:

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.

US Patent:

7172641, Feb 6, 2007

Filed:

Jun 18, 2004

Appl. No.:

10/871933

Inventors:

Bruce Allan Cook - Ankeny IA, US
Alan Mark Russell - Ames IA, US
Joel Lee Harringa - Ames IA, US
S. Bulent Biner - Clive IA, US
Iver Anderson - Ames IA, US

Assignee:

Iowa State University Research Foundation, Inc. - Ames IA

International Classification:

C22C 49/06

US Classification:

75244, 75249

Abstract:

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.

US Patent:

7238429, Jul 3, 2007

Filed:

Sep 21, 2004

Appl. No.:

10/946051

Inventors:

Bruce Allan Cook - Ankeny IA, US
Yun Tian - Ames IA, US
Joel Lee Harringa - Ames IA, US
Alan Paul Constant - Ames IA, US
Alan Mark Russell - Ames IA, US
Palaniappa A. Molian - Ames IA, US

Assignee:

Iowa State University Research Foundation, Inc. - Ames IA

International Classification:

B32B 15/20
C23C 14/34
C23C 14/16
C22C 21/00

US Classification:

428650, 428652, 428938, 20419216, 427250, 427554

Abstract:

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.

US Patent:

7517375, Apr 14, 2009

Filed:

Jan 4, 2006

Appl. No.:

11/325292

Inventors:

Bruce Allan Cook - Ankeny IA, US
Joel Lee Harringa - Ames IA, US
Alan Mark Russell - Ames IA, US
Justin S. Peters - Ames IA, US
Atiq Ahmed - Costa Mesa CA, US

Assignee:

Iowa State University Research Foundation, Inc. - Ames IA

International Classification:

C09K 3/14
C22C 29/00
C22C 29/12
C04B 35/00

US Classification:

51309, 75230, 75235, 501 963

Abstract:

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 ≦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).

US Patent:

20100203353, Aug 12, 2010

Filed:

Jun 23, 2009

Appl. No.:

12/456853

Inventors:

Iver E. Anderson - Ames IA, US
Joel Harringa - Ames IA, US
Jason K. Walleser - Idaho Falls IA, US

International Classification:

B32B 15/01
C22C 13/00

US Classification:

428646, 420560, 428615, 228101, 420591

Abstract:

A solder alloy comprises Sn, Ag, Cu, and Mn and has a melting temperature of about 211 degrees C. A solder joint and solder process embody the solder alloy as well as solder balls and solder paste made therefrom to provide a solidified joint that includes three different intermetallic phases and a Sn metal phase. An exemplary Sn—Ag—Cu—Mn alloy consists essentially of about 3 to about 4 weight % Ag, about 0.80 to about 1.0 weight % Cu, and about 0.05 to about 0.15 weight % Mn, and balance consisting essentially of Sn.

US Patent:

20110303448, Dec 15, 2011

Filed:

Apr 22, 2011

Appl. No.:

13/066748

Inventors:

Iver E. Anderson - Ames IA, US
Joel L. Harringa - Ames IA, US
Adam J. Boesenberg - Ames IA, US

International Classification:

H05K 1/02
H01R 4/02
B23K 35/14
C22C 13/00
B23K 31/02

US Classification:

174259, 420560, 228101, 228 563, 174 84 R

Abstract:

A solder alloy includes Sn, optional Ag, Cu, and Al wherein the alloy composition is controlled to provide a strong, impact-and thermal aging-resistant solder joint that has beneficial microstructural features and is substantially devoid of AgSn blades.

US Patent:

20130186449, Jul 25, 2013

Filed:

Dec 21, 2012

Appl. No.:

13/725156

Inventors:

RESEARCH TRIANGLE INSTITUTE - Research Triangle Park NC, US
Bruce Allen COOK - Ankeny IA, US
Evgenii M. LEVIN - Ames IA, US
Joel Lee HARRINGA - Ames IA, US

Assignee:

RESEARCH TRIANGLE INSTITUTE - Research Triangle Park NC

International Classification:

H01L 35/16

US Classification:

136238, 252500, 2525194

Abstract:

A thermoelectric material and a thermoelectric converter using this material. The thermoelectric material has a first component including a semiconductor material and a second component including a rare earth material included in the first component to thereby increase a figure of merit of a composite of the semiconductor material and the rare earth material relative to a figure of merit of the semiconductor material. The thermoelectric converter has a p-type thermoelectric material and a n-type thermoelectric material. At least one of the p-type thermoelectric material and the n-type thermoelectric material includes a rare earth material in at least one of the p-type thermoelectric material or the n-type thermoelectric material.