THIS GRANT IS A CONTINUATION OF N00014-14-1-0514 Mechanical Characterization of Disparate Material Systems
Abstract
The Funds are for Dr. Kevin Hemker. The research seeks to develop and employ novel experimental approaches to measure theconstitutive properties of the various components of layered systems. High-temperature bond coat strength, the elastic response ofceramic topcoats, and mode-II delamination toughness are all being characterized as a function of thermal and environmental exposure.These experiments support the development of new coatings and lay the foundation for mechanism-based lifetime modeling. Layeredmaterial systems are replacing advanced monolithic materials in a growing number of applications where the unique properties andfunctionality of each layer provides dramatically increased performance and life. Thermal barrier coatings (TBC) for metallic Ni-basesuperalloys and environmental barrier coatings (EBC) for ceramic matrix composites are two examples of layered material systems thathave been developed for extreme environments, consisting of high stresses and oxidizing and corrosive gases at temperatures on theorder of 1500oC. The availability of reliable layered material systems for these environments is crucial for the further development ofpower generation and propulsion systems with improved performance (power, efficiency, lower emissions, etc.).
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N000141612406
Entities
People
- Kevin Hemker
Organizations
- Johns Hopkins University
- Office of Naval Research
- United States Navy