David J. Green

Professor of Ceramic Science and Engineering

230 Steidle Bldg.

Penn State University

University Park, PA 16802

Phone: (814) 863-2011

FAX: (814) 865-0016

E-mail: David J. Green

Education:

• Ph.D. (Materials Science) McMaster University, Canada, 1977
• M.Sc. (Materials Science) McMaster University, Canada, 1972
• B.Sc. (Materials Science) University of Liverpool, England, 1970
• Dip. Ed. (Chemistry) University of Liverpool, England, 1969
• B.Sc. (Chemistry) University of Liverpool, England, 1968

Research Interests:

• Relationships between fabrication, microstructure and the properties of brittle materials
• Reliability of ceramics in structural design (thermal shock, creep, fracture, stress corrosion) and failure analysis
• Damage and distortion during sintering of ceramics
• Transformation-toughened ceramics
• Residual stresses, microcracking and surface strengthening
• Indentation and fatigue of glasses
• Mechanical behavior of porous ceramics

The reliability of many components and devices often depends on the mechanical properties of the materials being used. Therefore, it is crucial to understand the failure and deformation mechanisms that can occur in materials. The focus of Dr. Green's research activities has been to study these deformation and failure processes and to understand how they can be incorporated into the design process. This approach also allows new strategies for producing ceramics with improved strength and toughness. His research has also emphasized studying the thermo-mechanical properties of porous materials. For example, the success of the sintering process involves an understanding of mechanical behavior, since self-stresses can lead to damage and distortion. Porous materials are also finding new uses, such as high temperatures filters and radiant burners and, again, their mechanical performance will be a key factor in their deployment.

Technologies Impacted by Research:

• Ceramic manufacturing (green body characterization, sintering quality, co-firing)
• All technologies that use ceramics and/or glasses in their components and devices and in which lifetimes relate to mechanical failure.

Professional Experience:

Awards:

Selected Publications:

1. Uppalapati, M., and Green, D. J., Effect of External Lubricant on Mechanical Properties of Dry-Pressed Green Bodies, J. Am. Ceram. Soc., 88 [6] (2005) 1397-1402.
2. Mohanram, A., Messing, G. L., and Green, D. J., Densification and Sintering Viscosity of Low-Temperature Co-Fired Ceramic, J. Am. Ceram. Soc., 88 [10] (2005) 2681–85.
3. Uppalapati, M., and Green, D. J., Effect of Relative Humidity on the Viscoelastic and Mechanical Properties of Spray-Dried Powder Compacts, J. Am Ceram. Soc., 84 [4] 1212–17 (2006).
4. Aravind Mohanram, Sang-Ho Lee, Gary L. Messing, and David J. Green, Constrained Sintering of Low Temperature Co-fired Ceramics, J. Am. Ceram. Soc., 84 [6] 1923–29 (2006).
5. S. E. Schoenberg, G. L. Messing, A. E. Segall, A. S. Grader, P. M. Halleck and D. J. Green, Stresses and Distortion due to Green Density Gradients during Densification, J. Am. Ceram. Soc., 89 [10] 3027–33 (2006).