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Energy Materials Group

John Hardy

John Hardy

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352

Biography

John Hardy has been in the Materials Science department at PNNL since 1998 where the main focus of his research has been solid oxide fuel cell materials and components. His other research interests include ceramic-metal joining technologies, gas separation membranes, and ceramic-metal composites.

He has authored or co-authored more than 90 publications, including journal articles, conference proceedings, and technical reports, and more than 100 presentations at scientific conferences. He has also received 6 U.S. patents and 6 foreign patents.

Research Interests

  • Solid oxide fuel cell materials and components
  • Ceramic-metal joining technologies
  • Gas separation membranes
  • Ceramic-metal composites

Education and Credentials

  • Ph.D. Materials Science, Washington State University, expected graduation in Dec. 2011
  • M.S. Ceramic Engineering, Alfred University
  • B.S. Ceramic Engineering, Alfred University

Affiliations and Professional Service

  • American Ceramic Society

Selected Publications

2015

2014

2012

  • Hardy JS, JW Templeton, DJ Edwards, Z Lu, and JW Stevenson. 2012. "Lattice Expansion of LSCF-6428 Cathodes Measured by In-situ XRD during SOFC Operation." Journal of Power Sources 198:76-82.  doi:10.1016/j.jpowsour.2011.09.099
  • Hardy JS, JW Templeton, and JW Stevenson. 2012. "IN-SITU XRD OF OPERATING LSFC CATHODES: DEVELOPMENT OF A NEW ANALYTICAL CAPABILITY." Chapter 7 in Advances in Solid Oxide Fuel Cells, vol. VIII, ed. P Singh, et al.  John Wiley & Sons, Inc., Hoboken, NJ.  doi:10.1002/9781118217481.ch7
  • Lu Z, JS Hardy, JW Templeton, JW Stevenson, D Fisher, N Wu, and A Ignatiev. 2012. "Performance of Anode-Supported Solid Oxide Fuel Cell with Thin Bi-Layer Electrolyte by Pulsed Laser Deposition." Journal of Power Sources 210:292-296.  doi:10.1016/j.jpowsour.2012.03.036
  • Lu Z, JS Hardy, JW Templeton, and JW Stevenson. 2012. "Extended reaction zone of La0.6Sr0.4Co0.2Fe0.8O3 cathode for solid oxide fuel cell." Journal of Power Sources 198:90-94.  doi:10.1016/j.jpowsour.2011.09.020
  • Xu W, JZ Hu, MH Engelhard, SA Towne, JS Hardy, J Xiao, J Feng, MY Hu, J Zhang, F Ding, ME Gross, and J Zhang. 2012. "The Stability of Organic Solvents and Carbon Electrode in Nonaqueous Li-O2 Batteries." Journal of Power Sources 215:240-247.  doi:10.1016/j.jpowsour.2012.05.021

2011

  • Choi D, J Xiao, YJ Choi, JS Hardy, M Vijayakumar, MS Bhuvaneswari, J Liu, W Xu, W Wang, Z Yang, GL Graff, and J Zhang. 2011. "Thermal Stability and Phase Transformation of Electrochemically Charged/Discharged LiMnPO4 Cathode for Li-Ion Battery." Energy & Environmental Science 4(11):4560-4566.  doi:10.1039/C1EE01501J
  • Hardy JS, JW Templeton, Z Lu, and JW Stevenson. 2011. Enhanced Densification of SDC Barrier LayersPNNL-20908, Pacific Northwest National Laboratory, Richland, WA. 
  • Hardy JS, JW Templeton, Z Lu, and JW Stevenson. 2011. "Development of SOFC Cathodes." Chapter III.A.9 in 2011 Office of Fossil Energy Fuel Cell Program Annual Report, vol. DOE/NETL-2012-1525, pp. 84-87.  Department of Energy, Washington, DC. 
  • Lu Z, JS Hardy, JW Templeton, and JW Stevenson. 2011. "New insights in the polarization resistance of anode-supported solid oxide fuel cells with La0.6Sr0.4Co0.2Fe0.8O3 cathodes." Journal of Power Sources 196(1):39-45.  doi:10.1016/j.jpowsour.2010.07.054
  • Templeton JW, JS Hardy, Z Lu, and JW Stevenson. 2011. "THE EFFECT OF A-SITE STOICHIOMETRY ON LSCF CATHODE PERFORMANCE AND STABILITY." In Advances in Solid Oxide Fuel Cells VII: Ceramic Engineering and Science Proceedings, 35th Conference on Advanced Ceramics and Composites, January 23-28, 2011, Daytona Beach, Florida, vol. 32, ed. NP Bansal, et al.  John Wiley & Sons, Inc., Hoboken, NJ.  doi:10.1002/9781118095249.ch5
  • Templeton JW, Z Lu, JW Stevenson, and JS Hardy. 2011. Effect of A-site Non-stoichiometry on LSCF CathodesPNNL-20902, Pacific Northwest National Laboratory, Richland, WA. 
  • Xu W, K Xu, VV Viswanathan, SA Towne, JS Hardy, J Xiao, Z Nie, D Hu, D Wang, and J Zhang. 2011. "Reaction Mechanisms for the Limited Reversibility of Li-O2 Chemistry in Organic Carbonate Electrolytes." Journal of Power Sources 196(22):9631-9639.  doi:10.1016/j.jpowsour.2011.06.099

2008

  • Kim JYY, JS Hardy, and KS Weil. 2008. "ALUMINUM AIR BRAZING FOR JOINING CERAMICS." Chapter 42 in Advances in Ceramic Coatings and Ceramic-Metal Systems: Ceramic Engineering and Science Proceedings, vol. 26, no. 3, ed. D Zhu and K Plucknett, pp. 374-382.  John Wiley & Sons, Hoboken, NJ.  doi:10.1002/9780470291238.ch42

2007

  • Kim JYY, JS Hardy, and KS Weil. 2007. "Ag-Al based air braze for high temperature electrochemical devices." International Journal of Hydrogen Energy 32(16):3754-3762.  doi:10.1016/j.ijhydene.2006.08.055
  • Kim JYY, JS Hardy, and KS Weil. 2007. "Dual atmosphere tolerance of Ag-CuO based air braze." International Journal of Hydrogen Energy 32(16):3655-3663.  doi:10.1016/j.ijhydene.2006.08.054
  • Canfield NL, JV Crum, J Matyas, A Bandyopadhyay, KS Weil, LR Pederson, and JS Hardy. 2007. "Sintering of Mixed-Conducting Composites for Hydrogen Membranes From Nanoscale Co-Synthesized Powders." In Processing and manufacturing of advanced materials international conference; THERMEC 2006, Jul 5th, 2006, Vancouver, Canada. Materials Science Forum, vol. 539-543, no. Part. 2, pp. 1413-1420.  Trans Tech Publications, Zurich, Switzerland. 
  • Hardy JS, EC Thomsen, NL Canfield, JV Crum, KS Weil, and LR Pederson. 2007. "Development of Passive Hydrogen Separation Membranes made from Co-Synthesized Nanoscale Cermet Powders ." International Journal of Hydrogen Energy 32:3631 - 3639.  doi:10.1016/j.ijhydene.2006.08.016
  • Hardy JS, JYY Kim, EC Thomsen, and KS Weil. 2007. "Improved Wetting of Mixed Ionic/Electronic Conductors Used in Electrochemical Devices with Ternary Reactive Air Braze Filler Metals." Journal of the Electrochemical Society 154(3):P32-P39.  doi:10.1149/1.2430691
  • Hardy JS, NL Canfield, JV Crum, A Bandyopadhyay, KS Weil, and LR Pederson. 2007. "Co-synthesis of Mixed Conducting Composites for Hydrogen Separation: Compositional Considerations ." In Materials in Clean Power Systems: Applications, Corrosion, and Protection: 2006 TMS Annual Meeting & Exhibition, ed. ZG Yang, KS Weil and MP Brady, pp. 3-14.  TMS, Warrendale, PA. 
  • Weil KS, JS Hardy, and JYY Kim. 2007. "A New Technique for Joining Ceramic and Metal Components in High Temperature Electrochemical Devices." Journal of Advanced Materials (Special Edition No. 2):84-94. 

2006

  • Chou YS, JW Stevenson, JS Hardy, and P Singh. 2006. "Material Degradation during Isothermal Aging and Thermal Cycling of Hybrid Mica Seal with Ag Interlayer under SOFC Exposure Conditions." Journal of the Electrochemical Society 153(8):A1591-A1598. 
  • Kim JYY, JS Hardy, and KS Weil. 2006. "High temperature tolerance of the silver-copper oxide braze in reducing and oxidizing atmospheres." Journal of Materials Research 21(6):1434-1442.  doi:10.1557/jmr.2006.0178
  • Darsell JT, JS Hardy, JY Kim, and KS Weil. 2006. "Investigation of Pd-Modified Ag-CuO Air Braze Filler Metals." In Brazing and Soldering: Proceedings of the 3rd International Brazing and Soldering Conference, April 23-26, 2006, San Antonio, Texas, ed. JJ Stephens and KS Weil , pp. 167-175.  ASM International, Materials Park, OH. 
  • Hardy JS, and KS Weil. 2006. "Development of High-Temperature Air Braze Filler Metals for Use in Two-Step Joining and Sealing Processes." Welding Journal 87(8):195-s - 201-s. 
  • Weil KS, JYY Kim, JS Hardy, and JT Darsell. 2006. "Improved Wetting Characteristics in TiO2–Modified Ag-CuO Air Braze Filler Metals." In Proceedings of the 3rd International Conference on Brazing and Soldering, ed. JJ Stephens and KS Weil, pp. 120-124.  ASM International, Materials Park, OH. 
  • Weil KS, JYY Kim, JS Hardy, and JT Darsell. 2006. "The Effect of TiO2 on the Wetting Behavior of Silver-copper Oxide Braze Filler Metals." Scripta Materialia 54(6):1071-1075. 
  • Weil KS, JS Hardy, and BJ Koeppel. 2006. "New sealing concept for planar solid oxide fuel cells ." Journal of Materials Engineering and Performance 15(4):427-432. 
  • Weil KS, JS Hardy, and BJ Koeppel. 2006. "New Sealing Concept for Planar Solid Oxide Fuel Cells." Journal of Materials Engineering and Performance 15(4):427-432. 
  • Weil KS, JS Hardy, JP Rice, and JYY Kim. 2006. "Brazing as a Means of Sealing Ceramic Membranes for use in Advanced Coal Gasification Processes." Fuel 85(2):156-162. 
  • Weil KS, JS Hardy, JP Rice, and JY Kim. 2006. "Brazing as a Means of Sealing Ceramic Membranes for Use in Advanced Coal Gasification Processes." Fuel 85(2):156-162.  doi:10.1016/j.fuel.2005.07.023
  • Weil KS, JY Kim, JS Hardy, and JT Darsell. 2006. "Improved Wetting Characteristics in TiO2–Modified Ag-CuO Air Braze Filler Metals." In Brazing and Soldering 2006: Proceedings of the 3rd International Brazing and Soldering Conference, April 23-26, 2006, San Antonio, Texas, ed. JJStephens and KS Weil, pp. 120-124.  ASM International, Materials Park, OH. 
  • Weil KS, JY Kim, JS Hardy, and JT Darsell. 2006. "Investigation of Pd-Modified Ag-CuO Air Braze Filler Metals." In Proceedings of the 3rd Internation Conference on Brazing and Soldering, ed. JJ Stephens and KS Weil, pp. 167-175.  ASM International, Materials Park, OH. 

2005

  • Kim JYY, JS Hardy, and KS Weil. 2005. "Effects of CuO Content on the Wetting Behavior and Mechanical Properties of a Ag-CuO Braze for Ceramic Joining." Journal of the American Ceramic Society 88(9):2521-2527. 
  • Kim JYY, JS Hardy, and KS Weil. 2005. "Novel Metal-Ceramic Joining for Planar SOFCs." Journal of the Electrochemical Society 152(6):J52-J58. 
  • Kim JYY, JS Hardy, and KS Weil. 2005. "Silver-Copper Oxide Based Reactive Air Braze (RAB) for Joining Yttria-Stabilized Zirconia." Journal of Materials Research 20(3):636-643. 
  • Kim JYY, KS Weil, and JS Hardy. 2005. "Reactive Air Brazing for High-Temperature Electrochemical Applications." In ASM Conference Proceedings: Joining of Advanced and Specialty Materials VII - Proceedings from Materials Solutions 2004 on Joining of Advanced and Specialty Materials, Oct 18 - 20 2004, Columbus, OH, United States, pp. 8-17.  ASM International, Materials Park, OH. 
  • Kim JYY, KS Weil, and JS Hardy. 2005. "The Effect of High Temperature Exposure in Reducing or Oxidizing Atmosphere on Ceramic Joints Brazed with Silver-Copper Oxide." In Proceedings of the Materials Science and Technology 2005 (MS&T'05) Conference, Pittsburgh, PA, September 25-28, 2005, vol. 3, pp. 53-60.  Association for Iron and Steel Technology, Warrendale, PA. 
  • Kim JYY, KS Weil, and JS Hardy. 2005. "Wetting and Mechanical Characteristics of the Reactive Air Braze for Yttria-Stabilized Zirconia (YSZ) Joining." In Surfaces, Interfaces, and the Science of Ceramic Joining, held 2004 Published in Ceramic Transactions, vol. 158, pp. 101-110.  American Ceramic Society, Westerville. 
  • Weil KS, and JS Hardy. 2005. "A model cerium oxide matrix composite reinforced with a homogeneous dispersion of silver particulate - prepared using the glycine-nitrate process." In Advances in Ceramic Matrix Composites X, Proceedings of the 106th Annual Meeting of the American Ceramic Society, April 18-21, 2004, Indianapolis, Indiana. Ceramic Transactions, vol. 165, ed. JP Singh, NP Bansal and WM Kriven, pp. 23-30.  American Ceramic Society, Westerville, OH. 
  • Weil KS, and JS Hardy. 2005. "USE OF COMBUSTION SYNTHESIS IN PREPARING CERAMIC-MATRIX AND METAL-MATRIX COMPOSITE POWDERS." In Trends in Materials and Manufacturing Technologies for Transportation Industries and Powder Metallurgy Research and Development in the Transportation Industry, ed. T.R. Bieler, pp. 341-348.  Minerals, Metals & Materials Soc., Warrendale, PA. 
  • Coffey GW, JS Hardy, OA Marina, LR Pederson, PC Rieke, and EC Thomsen. 2005. "Copper Doped Lanthanum Strontium Ferrite for Reduced Temperature Solid Oxide Fuel Cells." In Fourteenth International Conference on Solid State Ionics, Jun 22-27 2003, Monterey, CA., USA. Published in Solid State Ionics, vol. 175, no. 1-4, pp. 73-78.  Elsevier, Amsterdam, Netherlands. 
  • Darsell JT, JS Hardy, JYY Kim, and KS Weil. 2005. "Microstructure, Melting and Wetting Properties of Pd-Ag-CuO Air Braze on Alumina." In Surfaces, Interfaces, and the Science of Ceramic Joining: Proceedings of the 106th Annual Meeting of the American Ceramic Society. Ceramic Transactions, vol. 158, ed. KS Weil, IE Reimanis and CA Lewisohn, pp. 173-182.  American Ceramic Society, Westerville, OH. 
  • Hardy JS, KS Weil, JYY Kim, and JT Darsell. 2005. "Pd-modified Reactive Air Braze for Increased Melting Temperature." In Surfaces, Interfaces, and the Science of Ceramic Joining (Ceramic Transactions Vol. 158), pp. 147-154.  American Ceramic Society, Westerville. 
  • Hardy JS, KS Weil, JYY Kim, EC Thomsen, and JT Darsell. 2005. "TiO2-modified Ag-CuO Reactive Air Brazes for Improved Wettability on Mixed Ionic/Electronic Conductors ." In Surfaces, Interfaces, and the Science of Ceramic Joining Published in CERAMIC TRANSACTIONS, vol. 158, pp. 165-171.  American Ceramic Society, Westerville. 
  • Lamb MC, SJ Camardello, A Meier, KS Weil, and JS Hardy. 2005. "BRAZING OF POROUS ALUMINA TO MONOLITHIC ALUMINA WITH Ag-CuO and Ag-V2O5 ALLOYS." In Proceedings of the 29th International Conference on Advanced Ceramics and Composites, January 23-28, 2005, Cocoa Beach, Florida. Ceramic Engineering and Science Proceedings., vol. 26, no. 3, pp. 391-398.  American Ceramic Society, Westerville, OH. 
  • Weil KS, BJ Koeppel, and JS Hardy. 2005. "A New Sealing Concept for Planar Solid Oxide Fuel Cells." In Joining of Advanced and Specialty Materials VII: Proceedings from Materials Solutions October 18–20, 2004, Columbus, Ohio, pp. 148-155.  ASM International, Materials Park, OH. 
  • Weil KS, JYY Kim, and JS Hardy. 2005. "Interfacial Analysis of (La0.6Sr0.4)(Co0.2Fe0.8)O3-d Substrates Wetted by Ag-CuO ." Journal of Materials Science 40(9-10):2341-2348.  doi:10.1007/s10853-005-1956-1
  • Weil KS, JYY Kim, and JS Hardy. 2005. "Reactive air brazing: A novel method of sealing SOFCs and other solid-state electrochemical devices." Electrochemical and Solid-State Letters 8(2):A133-136.  doi:10.1149/1.1850391
  • Weil KS, CA Coyle, JS Hardy, G Xia, and JY Kim. 2005. "NEW PLANAR SOFC SEALING TECHNIQUES FOR POTENTIAL TRANSPORTATION APPLICATIONS." In Proceedings of SOFC IX, vol. 2, ed. SC Singhal and J Mizusaki, pp. 1957-1966.  Electrochemical Society, Pennington, NJ. 
  • Weil KS, CA Coyle, JS Hardy, JYY Kim, and G Xia. 2005. "ALTERNATIVE METHODS OF SEALING PLANAR SOLID OXIDE FUEL CELLS." In Developments in Solid Oxide Fuel Cells and Lithium Ion Batteries, held 2004 Published in Ceramic Transactions, vol. 161, pp. 79-88.  American Ceramic Society, Westerville. 
  • Weil KS, CA Coyle, JT Darsell, G Xia, and JS Hardy. 2005. "Effects of Thermal Cycling and Thermal Aging on the Hermeticity and Strength of Silver-Copper Oxide Air-Brazed Seals." Journal of Power Sources 152:97-104. 
  • Weil KS, JE Deibler, JS Hardy, DS Kim, G Xia, and CA Coyle. 2005. "AN ENGINEERING TEST USEFUL IN DEVELOPING GLASS SEALS FOR PLANAR SOLID OXIDE FUEL CELLS." In Surfaces, Interfaces, and the Science of Ceramic Joining, held 2004 Published in Ceramic Transactions, vol. 158, pp. 73-80.  American Ceramic Society, Westerville. 
  • Weil KS, JS Hardy, G Xia, and CA Coyle. 2005. "USE OF RUPTURE STRENGTH TESTING IN EXAMINING THE THERMAL CYCLE BEHAVIOR OF VARIOUS TYPES OF PLANAR SOLID OXIDE FUEL CELL SEALS." In Mechanical Properties and Performance of Engineering Ceramics and Composites. A Collection of Papers Presented at the 29th International Conference on Advanced Ceramics and Composites, January 23-28, 2005, Cocoa Beach, Florida: Ceramic Engineering and Science Proceedings, vol. 26, no. 2, ed. E Lara-Curzio, pp. 149-155.  American Ceramic Society, Westerville, OH.  doi:10.1002/9780470291221.ch19
  • Zink NM, A Meier, KS Weil, and JS Hardy. 2005. "REACTIVE AIR BRAZING OF LSCoF AND ALUMINA WITH Ag-V2O5 ALLOYS FOR SOFC APPLICATIONS." In Proceedings of the 29th International Conference on Advanced Ceramics and Composites, January 23-28, 2005, Cocoa Beach, Florida. Ceramic Engineering and Science Proceedings, vol. 26, no. 3, pp. 341-348.  American Ceramic Society, Westerville, OH. 

2004

  • Kim JYY, JS Hardy, and KS Weil. 2004. "Use of Aluminum in Air-Brazing Aluminum Oxide." Journal of Materials Research 19(6):1717-1722. 
  • Weil KS, and JS Hardy. 2004. "DEVELOPMENT OF A COMPLIANT SEAL FOR USE IN PLANAR SOLID OXIDE FUEL CELLS ." Chapter 46 in 28th International Conference on Advanced Ceramics and Composites A: Ceramic Engineering and Science Proceedings, vol. 25, no. 3, ed. E Lara-Curzio and MJ Readey, pp. 321-326.  American Ceramic Society, Westerville, OH.  doi: 10.1002/9780470291184.ch46
  • Coffey GW, JS Hardy, OA Marina, LR Pederson, PC Rieke, and EC Thomsen. 2004. "Copper Doped Lanthanum Strontium Ferrite for Reduced Temperature Solid Oxide Fuel Cells." Solid State Ionics 175(1-4):73-78.  doi:10.1016/j.ssi.2004.09.015
  • Darsell JT, JS Hardy, JYY Kim, and KS Weil. 2004. "AN INVESTIGATION OF WETTABILITY, AND MICROSTRUCTURE IN ALUMINA JOINTS BRAZED WITH Ag-CuO-TiO2 ." In Ceramic Transactions: Surfaces, Interfaces, and the Science of Ceramic Joining: Proceedings of the 106th Annual Meeting of the American Ceramic Society, vol. 158, ed. KS Weil, IE Reimanis and CA Lewinsohn, pp. 65-72.  American Ceramic Society, Westerville, OH. 
  • Darsell JT, JS Hardy, JYY Kim, and KS Weil. 2004. "Microstructure, Melting and Wetting Properties of Pd-Ag-CuO Air Braze on Alumina." In Surfaces, Interfaces and Science of Ceramic Joining: Proceedings of the 106th Annual Meeting of The American Ceramic Society, Indianapolis, Indiana, USA 2004, Ceramic Transactions, vol. 158, ed. KS Weil, IE Reimanis and CA Lewinshohn, pp. 173-182.  American Ceramic Society, Westerville, OH. 
  • Hardy JS, JYY Kim, and KS Weil. 2004. "Joining Mixed Conducting Oxides Using an Air-Fired Electrically Conductive Braze." Journal of the Electrochemical Society 151(8):J48-J49. 
  • Hardy JS, JT Darsell, CA Coyle, JC Birnbaum, and KS Weil. 2004. "Thermal Cyclability of Reactive Air Braze Seals in Anode Supported Solid Oxide Fuel Cells." In Joining of Advanced and Specialty Materials VI - Proceedings from Materials Solutions 2003 on Joining of Advanced and Specialty Materials, Oct. 13-15 2003, Pittsburgh, PA, United States, pp. 51-58.  ASM International, Materials Park, OH. 
  • Weil KS, JE Deibler, JS Hardy, DS Kim, G Xia, LA Chick, and CA Coyle. 2004. "Rupture Testing as a Tool for Developing Planar Solid Oxide Fuel Cell Seals." Journal of Materials Engineering and Performance 13(3):316-326. 
  • Weil KS, JS Hardy, and JT Darsell. 2004. "INVESTIGATION OF A NOVEL AIR BRAZING COMPOSITION FOR HIGH-TEMPERATURE, OXIDATION-RESISTANT CERAMIC JOINING." Chapter 14 in 28th International Conference on Advanced Ceramics and Composites A: Ceramic Engineering and Science Proceedings, vol. 25, no. 3, ed. E Lara-Curzio and MJ Readey, pp. 107-112.  American Ceramic Society, Westerville, OH.  doi:10.1002/9780470291184.ch14
  • Weil KS, JT Darsell, JS Hardy, and JYY Kim. 2004. "Advances in Air Brazing for Use in Joining and Sealing High-Temperature Gas Separation Membranes." In Proceedings of the 18th Annual Conference on Fossil Energy Materials, June 2-4, 2004, Knoxville, Tennessee, vol. ORNL/R04-1203.5, ed. RR Judkins and LS Mack.  Oak Ridge National Laboratory, OAK RIDGE, TN. 
  • Yang ZG, JS Hardy, MS Walker, G Xia, SP Simner, and JW Stevenson. 2004. "Structure and Conductivity of Thermally Grown Scales on Ferritic Fe-Cr-Mn Steel for SOFC Interconnect Applications ." Journal of the Electrochemical Society 151:A1825. 

2003

  • Weil KS, and JS Hardy. 2003. "Brazing a Mixed Ionic/Electronic Conductor to an Oxidation Resistant Metal." In Advances in Joining of Ceramics: Proceedings of the Joining of Ceramics Symposium: Held at the 104th Annual Meeting of the American Ceramic Society, April 28-May 1, 2002, in St. Louis, Missouri., vol. 138, ed. C A Lewinsohn, M Singh, R Loehman, pp. 185-200.  American Ceramic Society, Westerville, OH. 
  • Weil KS, and JS Hardy. 2003. "Electrically Joining Mixed Conducting Oxides for High Temperature Applications." In Proceedings of the International Brazing and Soldering Conference, February 16-19, 2003, San Diego, California.  American Welding Society, Miami, FL. 
  • Coffey GW, JS Hardy, LR Pederson, PC Rieke, and EC Thomsen. 2003. "Oxygen Reduction Activity of Lanthanum Strontium Nickel Ferrite." Electrochemical and Solid-State Letters 6(6):A121-A124. 
  • Coffey GW, JS Hardy, LR Pederson, PC Rieke, EC Thomsen, and MB Walpole. 2003. "Electrochemical Properties of Lanthanum Strontium Aluminum Ferrites for the Oxygen Reduction Reaction." Solid State Ionics 158(1-2):1-9. 
  • Weil KS, CA Coyle, JYY Kim, and JS Hardy. 2003. "The Effect of Composition on the Wetting Behavior and Joint Strength of the Ag-CuO Reactive Air Braze." In Solid State Ionics-2002: Symposium held December 2-5, 2002, Boston, Massachusetts, U.S.A. , vol. 756, ed. Philippe Knauth; Hubert A Gasteiger, pp. 551-556.  Materials Research Society, Warrendale, PA. 
  • Weil KS, JS Hardy, and JYY Kim. 2003. "Development of a Silver-Copper Oxide Braze for Joining Metallic and Ceramic Components in Electrochemical Devices." In Proceedings of the International Brazing and Soldering 2003 Conference, p. 1.1.  American Welding Society, Miami, FL. 
  • Weil KS, JS Hardy, and JYY Kim. 2003. "Development of Brazing Technology for Use in High Temperature Gas Separation Equipment." In Proceedings of the 17th Annual Conference on Fossil Energy Materials, April 22-24, 2003, Baltimore, Maryland.  National Energy Technology Laboratory, Morgantown, WV. 
  • Weil KS, JS Hardy, and JYY Kim. 2003. "Use of Novel Ceramic-Metal Braze for Joining in High Temperature Electrochemical Devices." In Joining of Advanced and Specialty Materials V Proceedings 2002, ed. Indacochea, J. E., pp. 47-55.  ASM International , Materials Park, OH. 
  • Weil KS, JS Hardy, and JY Kim. 2003. "Development of a Silver-Copper Oxide Braze for Joining Metallic and Ceramic Components in Electrochemical Devices." In 2nd International Brazing and Soldering Conference, p. 1.1.  American Welding Society, Miami, FL. 

2002

  • Weil KS, and JS Hardy. 2002. "Development of a New Ceramic-to-Metal Brazing Technique for Oxygen Separation/Generation Applications." In Proceedings of the 2002 Fossil Energy Conference, April 22-24, 2002, Baltimore, Maryland.  National Energy Technology Laboratory, Pittsburgh, PA. 
  • Coffey GW, JS Hardy, KD Meinhardt, OA Marina, and SP Simner. 2002. "All-Ceramic SOFC Tolerant to Oxygen, Carbon and Sulfur." In 2002 Fuel Cell Seminar: Fuel Cells - Reliable, Clean Energy for the World, November 19-21, 2002, Palm Springs, California. , pp. 295-298.  Fuel Cell Seminar, Washington, DC. 

2001

  • Simner SP, JS Hardy, JR, and JW Stevenson. 2001. "Sintering and Properties of Mixed Lanthanide Chromites." Journal of the Electrochemical Society 148(4):A351-A360. 

2000

  • Chou YS, JW Stevenson, TR Armstrong, JS Hardy, K Hasinska, and LR Pederson. 2000. "Microstructure and mechanical properties of Sm1-xSrxCo0.2Fe0.8O3." Journal of Materials Research 15(7):1505-1513. 
  • Simner SP, JS Hardy, JW Stevenson, and TR Armstrong. 2000. "Sintering Of Lanthanum Chromite Using Strontium Vanadate." Solid State Ionics 128 (1-4):53-63. 
  • Simner SP, JS Hardy, JW Stevenson, and TR Armstrong. 2000. "Sintering of Non-Stoichiometric Strontium Doped Lanthanum Chromite." Journal of Materials Science 19(10):863-865. 
  • Simner SP, JW Stevenson, JS Hardy, and LA Chick. 2000. "Cost Reduction of Lanthanum Chromite Materials ." In 2000 Fuel Cell Seminar, pp. 631-634.  Courtesy Associates, Washington, DC. 
  • Simner SP, JW Stevenson, JS Hardy, and LA Chick. 2000. "Cost Reduction of Lanthanum Chromite Materials." In Fuel cells--powering the 21st Century : 2000 Fuel Cell Seminar, October 30-November 2, 2000, Portland, Oregon, Oregon Convention Center : abstracts, pp. 631-634.  Courtesy Associates, Washington, DC. 

1999

  • Armstrong TR, SP Simner, JS Hardy, and JW Stevenson. 1999. "Optimizing Lanthanum Chromite Interconnects for Solid Oxide Fuel Cells." In 6th International Symposium on Solid Oxide Fuel Cells (SOFC-VI), vol. 99, no. 19, pp. 706-715.  The Electrochemical Society, Inc., Pennington, NJ. 
  • Simner SP, JS Hardy, JW Stevenson, and TR Armstrong. 1999. "Sintering and Property Characterization of Strontium-Doped Lanthanum Chromite." In Solid Oxide Fuel Cells (SOFC VI). Proceedings of the Sixth International Symposium, Oct. 17-22, 1999, Honolulu, HI, pp. 696-705.  The Electrochemical Society, Inc., Pennington, NJ. 
  • Simner SP, JS Hardy, JW Stevenson, and TR Armstrong. 1999. "Sintering and Property Characterization of Strontium-Doped Lanthanum Chromite." In Solid Oxide Fuel Cells (SOFC VI): Proceedings of the 6th International Conference held in Honolulu, October 1999, ed. SC Singhal, M Dokiya, pp. 696-705.  Electrochemical Society, Pennington, NJ. 

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