THIS IS A CONTINUATION OF N00014-11-1-0605 Bond Coat Alloys with Improved Hot Corrosion Resistance
Abstract
These funds are for Dr. Arthur Heuer. The work proposed here involves two related but distinct tasks; determination of grain boundary diffusion kinetics using the stable oxygen isotope, 18O2, and TEM study of disconnection at both scale grain boundaries and at scale/substrate interfaces. Dr. Heuer will undertake studies of several alloy systems comprising various phase chemistry (beta, beta /gamma , and gamma/gamma prime?), with and without minor element additions (Co, Y, Hf, Si, Pt) . (Note that Co is specifically includedin the beta phase alloys as an important variable, as Co is known to be beneficial against Type I hot corrosion (for reasons that are not clear) but is terrible against Type II hot corrosion. In addition, there will be a close collaboration with an engine OEM (original equipment manufacturuer), a prime consumer of our research findings. The mechanisms involved in transient oxidation will be studied at CWRU, as just noted, as well as the TGO microstructures after various oxidation treatments and exposures to molten Na2SO4. The resistance of the alloys to Type I and Type II hot corrosion will be studied concurrently at the University of Pittsburgh. Correlations between transient oxide structure and hot corrosion resistance will inform the design of future alloys and coatings for hot corrosion resistance.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N000141612405
Entities
People
- A. H. Heuer
Organizations
- Case Western Reserve University
- Office of Naval Research
- United States Navy