We investigate the role of structural (polymorphous transformation), chemical (solute clusters) and structural/chemical defects (solute rich and lean f.c.c. nanocrystals) at the nm-scale on corrosion. One examples is the study of nanocrystals:

• Nanocrystals in an amorphous matrix covered by a chemically homogeneous oxide [1]

• Theoretical effects of isolated nanoscale particles of copper including bonding-coordination effects and quantum size effects [2]

• Solute lean nanocrystal with a protective compositional field [3] in the remaining amorphous matrix around them [3]

CORROSION MECHANISMS IN AMORPHOUS ALLOYS: CRITICAL CORROSION MECHANISMS IN AMORPHOUS ALLOYS: CRITICAL COMPOSITIONAL AND STRUCTURAL DEFECTS FOR LOCAL CORROSIONCOMPOSITIONAL AND STRUCTURAL DEFECTS FOR LOCAL CORROSION

JJohn R. Scully, University of Virginia, DMR 0504983

(left) STEM-DF image showing a typical microstructure near the oxide/metal interface of amorphous nanocrystalline alloy (Al-Fe-Gd) with f.c.c. nanocrystals formed by primary crystallization.

[2]

[1]

Devitrification Routes in Metallic Glasses = Defects

• Polymorphous crystallization (1,2, or 3): G → M or • Eutectic crystallization (4 or 5): G → M or + • Primary crystallization (6) G → G + (solute lean

nanocrystal)• Final equilibrium (5’) +

Amorphous matrix and solute lean f.c.c nanocrystals

___ 20 nm

G= Glass

[3]

Solute field around a solute lean nanocrystal impedded in an amorphous matrix

Isolated fcc particle with 38 atoms

Corrosion EducationCorrosion Education 3 Undergraduates (J. Biddick, L. Stohr, G. Burke), 5 graduate students (Ashley Lucente, Meghan Goldman, Tomo Aburada, Nicki Tailleart, Derek Horton), and 2 post-doctoral researchers (Chris Taylor and Ruoshuang Huang) have contributed to NSF-supported project.

Graduate, undergraduate, and traveling short courses in corrosion.

John R. Scully serves on National Academy National Materials Advisory Panel on Assessing Corrosion Education (ACE)

Corrosion EducationCorrosion Education 3 Undergraduates (J. Biddick, L. Stohr, G. Burke), 5 graduate students (Ashley Lucente, Meghan Goldman, Tomo Aburada, Nicki Tailleart, Derek Horton), and 2 post-doctoral researchers (Chris Taylor and Ruoshuang Huang) have contributed to NSF-supported project.

Graduate, undergraduate, and traveling short courses in corrosion.

John R. Scully serves on National Academy National Materials Advisory Panel on Assessing Corrosion Education (ACE)

(Title) IIName, Institution, DMR Award#

Spatio-temporal Chaos in Systems of Broken Symmetry

Eberhard Bodenschatz, Cornell University, DMR Award#0072077

OutreachOutreach cKITs supplied by National Association of Corrosion Engineers supplied to local middle schools (a set of corrosion experiments)

Materials science and engineering demonstrations and lab tours were given for local Girl Scout Troops and local Elementary School classes to foster an interest in the physical sciences and materials science.

OutreachOutreach cKITs supplied by National Association of Corrosion Engineers supplied to local middle schools (a set of corrosion experiments)

Materials science and engineering demonstrations and lab tours were given for local Girl Scout Troops and local Elementary School classes to foster an interest in the physical sciences and materials science.

CORROSION MECHANISMS IN AMORPHOUS ALLOYS: CRITICAL CORROSION MECHANISMS IN AMORPHOUS ALLOYS: CRITICAL COMPOSITIONAL AND STRUCTURAL DEFECTS FOR LOCAL CORROSION COMPOSITIONAL AND STRUCTURAL DEFECTS FOR LOCAL CORROSION

John R. Scully, University of Virginia, DMR 0504983

AwardsAwards

Ashley Lucente: First Place - Marcel Pourbaix Award for Best Poster in Corrosion Science, National Association of Corrosion Engineers 2003, Meghan Goldman : Second Place - Marcel Pourbaix Award for Best Poster in Corrosion Science, National Association of Corrosion Engineers 2003.

John R. Scully: Elected Fellow of the Society – American Society for Metals 2007, Electrochemical Society 2006

AwardsAwards

Ashley Lucente: First Place - Marcel Pourbaix Award for Best Poster in Corrosion Science, National Association of Corrosion Engineers 2003, Meghan Goldman : Second Place - Marcel Pourbaix Award for Best Poster in Corrosion Science, National Association of Corrosion Engineers 2003.

John R. Scully: Elected Fellow of the Society – American Society for Metals 2007, Electrochemical Society 2006

Corrosion Education Pyramid

Technician, plant/equipment inspector, maintainer, manufacturer

Material specifier (architect, builder)Maintainer, supervisor, etc.

Mechanical, electrical, aerochemical engineer, (designer)

Corrosion Engineer(specialist)

CorrosionScientist (M.S. & Ph.D.)

University of VirginiaCenter for Electrochemical Science and Engineering

Univ. and technical society short coursesand training programs, community colleges?

In-house training, web-based courses, UVa