Diffraction and Thermophysical
Properties Group

   Group

  Diffraction User Center
  Residual Stress User Center
  Thermophysical Properties User Center
  Diff. and Therm. Prop. Group
  High Temperature Materials Laboratory
  Oak Ridge National Laboratory


Ralph B. Dinwiddie Ralph B. Dinwiddie

Position:

Research Scientist

Education Discipline:

Condensed Matter Physics

Broad Fields of Endeavor:

Measurement and modeling of the thermophysical properties of condensed matter.

Education:

  • Ph. D. Physics, University of Delaware, DE
  • M.S. Physics, University of Delaware, DE
  • B.S. Applied Physics, Stockton State College, NJ

Societies and Professional Activities:

  • Materials Research Society
  • American Ceramic Society
  • American Society for Testing and Materials
  • Principle Investigator on the Advanced Turbine Systems (ATS) Program
  • Chairman of the Thermosense Working Group
  • Vice Chair of the Governing Board of the International Thermal Conductivity Conferences

Scope of Research:

  • Investigated the effect of oxygen impurities, rare earth oxide dopants and processing temperature on the thermal conductivity of aluminum nitride.
  • Studied the effect of fiber type, loading, orientation and heat treatment temperature on the thermal conductivity of carbon-carbon composites.
  • Conducted studies on the effect of thermal aging on the thermal diffusivity and thermal conductivity of plasma sprayed zirconia thermal barrier coatings.
  • Develops automated instrumentation for the measurement of thermal transport properties.
  • Uses theoretical models to relate microstructure and processing conditions to the thermal conductivity of structural ceramics.
  • Maps Thermal Properties and Temperatures, and performs NDE using a high-speed, high-sensitivity infrared camera.

Recent User/Fellowship Projects:

  • Experimental Observations Thermoelastic Instabilities in Automotive Brake Systems - Ford
  • Temperature Mapping and Thermophysical Properties of Automotive Brake Drums - GM/Delphi Chassis Systems
  • Thermophysical Properties of Molten HY-100 Steel - Concurrent Technologies Corp.
  • Thermal Diffusivity of Thermal Barrier Coatings for Turbine Engine Applications - Westinghouse

Publications - List of Staff Member's Publications (PDF)

Contact:

Ralph B. Dinwiddie
Metals and Ceramics Division
Oak Ridge National Laboratory
P.O. Box 2008
Oak Ridge, TN 37831-6064
Phone: (865) 574-7599
Fax: (865) 574-3940
E-mail: dinwiddierb@ornl.gov

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Diffraction UC | Residual Stress UC | Thermophysical Properties UC
Diffraction & Thermophysical Prop. Group | High Temperature Materials Laboratory
Materials Science & Technology Division | Oak Ridge National Laboratory

Acknowledgments
URL: http://www.html.ornl.gov/staff/dinwidd.html