Loading...
Please wait, while we are loading the content...
Experimental and theoretical studies of volatile metal hydroxides
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Myers, Dwight L. Jacobson, Nathan S. |
| Copyright Year | 2015 |
| Description | Modern superalloys used in the construction of turbomachinery contain a wide range of metals in trace quantities. In addition, metal oxides and silicon dioxide are used to form Thermal Barrier Coatings (TBC) to protect the underlying metal in turbine blades. Formation of volatile hydroxides at elevated temperatures is an important mechanism for corrosion of metal alloys or oxides in combustion environments (N. Jacobson, D. Myers, E. Opila, and E. Copland, J. Phys. Chem. Solids 66, 471-478, 2005). Thermodynamic data is essential to proper design of components of modern gas turbines. It is necessary to first establish the identity of volatile hydroxides formed from the reaction of a given system with high temperature water vapor, and then to determine the equilibrium pressures of the species under operating conditions. Theoretical calculations of reaction energies are an important check of experimental results. This presentation reports results for several important systems: Si-O-H, Cr-O-H, Al-O-H, Ti-O-H, and ongoing studies of Ta-O-H. |
| File Size | 1700224 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20150023049 |
| Archival Resource Key | ark:/13960/t80k7cq5w |
| Language | English |
| Publisher Date | 2015-07-26 |
| Access Restriction | Open |
| Subject Keyword | Thermal Barrier Coatings Superalloys Hydroxides Turbine Engines Turbine Blades Alloys Turbomachinery Oxides High Temperature Water Vapor Silicon Dioxide Metal Oxides Thermal Control Coatings Gas Turbines Corrosion Heat Resistant Alloys Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Presentation |
