Homepage John H. Perepezko

John H. Perepezko

Professor

Office location:
1121 Engineering Research Building
1500 Engineering Drive
Madison, WI 53706

Mailing address:
1509 University Ave.
Madison, WI 53706

Tel: 608/263-1678
Fax: 608/262-8353
E-mail: perepezk@engr.wisc.edu
Portrait: 35K JPG
COE Homepage: http://www.engr.wisc.edu/mse/faculty/perepezko_john.html

Classes
Msae 352: Materials Science - Transformation of Solids, Spring 2009
Msae 752: Advanced Materials Science - Phase Transformations, Fall 2008
Msae 463: Materials for Elevated Temperature Service, Fall 2007
Msae 465: Fundamentals of Heat Treatment, Fall 2006
Msae 401: Special Topics

Departments
Materials Science and Engineering

Program Affiliations
Materials Science Program

Education
BS (metallurgical engineering) 1967, Polytechnic Institute of New York
MS (metallurgical engineering) 1968, Polytechnic Institute of New York
PhD (metallurgy and materials science) 1973, Carnegie-Mellon University

Fields of Interest
phase transformations, interface reactions/coating design, metastable and amorphous phases, kinetics, nucleation, metal powders and high temperature intermetallic alloys, rapid solidification, microgravity processing

Selected Publications
  • "Phase Reactions in Cold Rolled Al/Ni Multilayers" H. Sieber, J.S. Park, J. Weissmüller and J.H. Perepezko, Acta Materialia 49, 1139 (2001).

  • "Multiphase Microstructures and Stability in High Temperature Mo-Si-B Alloys", J.H. Perepezko, R. Sakidja, S. Kim and J.S. Park in Structural Intermetallics 2001, Eds. K.J. Hemker, D.M. Dimiduk, H. Clemens, R. Darolia, H. Inui, J.M. Larsen, V.K. Sikka,M. Thomas and J.D. Whittenberger (TMS, Warrendale, PA) 505 (2001).

  • "Amorphous Aluminum Alloys-Synthesis and Stability", J.H. Perepezko and R.J. Hebert, Journal of Metals 54 34 (2002).

  • "Coating Designs for Oxidation Control of Mo-Si-B Alloys" J.S. Park, R. Sakidja and J.H. Perepezko, Scripta Materialia 46 765 (2002).

  • "Amorphization and Nanostructure Synthesis in Al Alloys", J.H. Perepezko, R.J. Hebert and W.S. Tong, Intermetallics 10 1079 (2002).

  • "Initial Crystallization Kinetics in Undercooled Droplets" , J.H. Perepezko, P.G. Höckel, J.S. Paik, Thermochemica Acta 388 129 (2002).

  • "Nucleation-Catalysis-Kinetics Analysis under Dynamic Conditions", J. H. Perepezko and W. S. Tong, Philosophical Transactions of the Royal Society of London Series A, 361, 447 (2003).

  • "Structural Transformations in Crystalline and Amorphous Multilayer Samples during Cold-Rolling", R. J. Hebert and J. H. Perepezko, Scripta Materialia, 49, 933 (2003).

  • "Nanocrystallization Reactions in Amorphous Aluminum Alloys", J. H. Perepezko, R. J. Hebert, W. S. Tong, J. Hamann, H. R. Rosner and G. Wilde: Mater. Trans. JIM, 44, 1982 (2003).

  • "Alloying Reactions in Nanostructured Multilayers during Intense Deformation", J.H. Perepezko and R.J. Hebert, Z. Metallkd. 94, 1111(2003).

  • "Transition Metal Alloying and Phase Stability in the Mo-Si-B System", R. Sakidja, S. Kim, J.S. Park, and J.H. Perepezko, Mat. Res. Soc. Symp.,753, BB2.3 (2003).

  • "Mo-Si-B Alloys: Developing a Revolutionary Turbine-Engine Materials" D.M. Dimiduk and J.H. Perepezko, MRS Bulletin, 28 639 (2003).

  • "Nucleation-Controlled Reactions and Metastable Structures", J.H. Perepezko, Progress in Materials Science, 49, 263 (2004).

  • "Deformation-induced synthesis and structural transformations of metallic multilayers", R. J. Hebert and J. H. Perepezko, Scripta Materialia, 50, 807 (2004).

  • "Nanocrystallization", J.H. Perepezko, Encylopedia of Nanoscience and Nanotechnology,. (Marcel Dekker, New York) 2305 (2004).

  • “Interface Reactions between Ni and Amorphous SiC”, J.H. Perepezko, Z.F. Dong, S.Kim and A.S. Edelstein, Jnl. of Electronic Materials 33, 1064 (2004).

  • “Aluminum Nanoscale Order in Amorphous Al92Sm8 Measured by Fluctuation Electron Microscopy”, W.G. Stratton, J. Hamann, J.H. Perepezko,  P.M. Voyles, X. Mao and S.V. Khare, Appl. Phys. Lett., 86, 141910 (2005).

  • “Phase Stability and Alloying Behavior in the Mo-Si-B System”, R. Sakidja, and J. H. Perepezko, Met. And Mat. Trans., 36A, 507 (2005).

  • “Synthesis of Oxidation Resistant Silicide Coatings on Mo-Si-B Alloys” R. Sakidja, J.S. Park, J. Hamann and J.H. Perepezko, Scripta Mater., 53,  723 (2005).

  • “Nucleation Controlled Phase Selection during Solidification” , J.H. Perepezko, Mat. Sci. and Eng. 413-414A, 389 (2005).

  • “Dislocation Formation during Deformation-Induced Synthesis of Nanocrystals in Amorphous and Partially Crystalline Amorphous Al88Y7Fe5 Alloy” R. Hebert, J.H. Perepezko, H. Rösner and G. Wilde, Scripta Mat., 54, 25 (2006).

  • “Critical Cooling Rate for Fe48Cr15Mo14Y2C15B6 Bulk Metallic Glass Formation”, K. Hildal, N. Sekido and J.H. Perepezko,  Intermetallics,  14, 898 (2006).

  • “Bulk Liquid Undercooling and Nucleation in Gold”, G. Wilde, J.L. Sebright and J.H. Perepezko, Acta Mater., 54,  4759 (2006).

  • “Analysis of Solidification Microstructures during Wedge-Casting” J.H. Perepezko and K. Hildal, Phil. Mag. 86 , 3681 (2006).

  • “Aluminum Pack Cementation on Mo–Si–B Alloys”, F. Rioult, N. Sekido, R. Sakidja, and J. H. Perepezko, J. Electrochem. Soc. 154, C692 (2007).

  • “DTA and Heat-Flux DSC Measurements of Alloy Melting and Freezing”, W. J. Boettinger, U. R. Kattner, K-W. Moon and J. H. Perepezko, in Methods for Phase Diagram Determination J.-C. Zhao,Ed. (Elsevier, Oxford) 151-221 (2007).

  • “Effect of Intense Rolling and Folding on the Phase Stability of Amorphous Al-Y-Fe Alloys”, R.J. Hebert and J.H. Perepezko, Met. and Mat. Trans., 39A, 1804 (2008)

  • “Phase Stability and Structural Defects in High-Temperature Mo–Si–B Alloys”, R. Sakidja, J.H. Perepezko, S. Kim and N. Sekido, Acta Mater.,  56, 5223, (2008)

  • “Metallic Glass Formation Reactions and Interfaces”, J.H. Perepezko and K. Hildal, Mater. Sci. and Eng., 148B, 171 (2008)

  • “Superheating”, J. H. Perepezko, Encyclopedia of Materials: Science and Technology, 8975, (2008)

  • “Nucleation Kinetics and Grain Refinement”, J.H. Perepezko, ASM Handbook, Volume 15: Casting, (ASM-International, Materials Park, OH) 276 (2008).

  • “Transient oxidation of Mo–Si–B alloys: Effect of the microstructure size scale”, F.A. Rioult, S.D. Imhoff, R. Sakidja, J.H. Perepezko, Acta Mater. 57, 4600 (2009)

    • Summary
    As a result of our efforts in the analysis and modeling of alloy solidification it has been possible to identify new microstructural morphologies and to establish processing conditions where nucleation controlled kinetics dominates the microstructural evolution. This basic information can be applied to understand grain refinement and novel microstructures in cast and rapidly solidified alloys. It also is used to guide microgravity materials processing and alloy design including the solidification processing of composite materials. Extreme solidification conditions at high rates and /or high undercooling often result in metastable phases and amorphous alloys. Our work on amorphous Al alloys has focused on understanding glass formation and the primary crystallization reaction that yields a high density of Al nanocrystals. Interestingly, similar microstructures can be synthesized by the repeated cold rolling of elemental multilayers as a driven system processing where the deformation induced alloying at interfaces is a key issue for study.

    Our work has yielded new understanding on the nucleation of phases during interdiffusion and interface reaction in thin-film multilayers. With this understanding we have developed the concept of a kinetic bias and have demonstrated the application of biasing to control diffusion pathways and produce phase selection during interfacial reactions in multicomponent systems. These concepts provide for an effective strategy to synthesize structural composites by in-situ reactions and also to develop electronic materials such as photovoltaics or high-temperature devices from multilayers. We have recently extended the capability of using in-situ reactions and kinetic biasing to the design of robust coatings that exhibit self-healing behavior as well as oxidation protection at high temperature.

    Other studies of multiphase microstructures involve examining high-temperature alloys such as superalloys, titanium aluminide intermetallics and refractory alloys. The examination of phase stability and reaction kinetics during processing provides a basis for the achievement of tailored microstructures and alloy designs to enhance performance in structural applications as demonstrated in advanced Mo-Si-B alloys.

    Last Modified: 10/1/2009
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