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Effect of oxide films on hydrogen permeability of candidate stirling engine heater head tube alloys
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Schuon, S. R. Misencik, J. A. |
| Copyright Year | 1981 |
| Description | The effect of oxide films developed in situ from CO/CO2 doped hydrogen on high pressure hydrogen permeability at 820 C was studied on N-155, A-286, IN 800, 19-9DL, Nitronic 40, HS-188, and IN 718 tubing in a Stirling materials simulator. The hydrogen permeability decreased with increasing dopant levels of CO or CO2 and corresponding decreases in oxide porosity. Minor reactive alloying elements strongly influenced permeability. At high levels of CO or CO2, a liquid oxide formed on alloys with greater than 50 percent Fe. This caused increased permeability. The oxides formed on the inside tube walls were analyzed and their effective permeabilities were calculated. |
| File Size | 11841498 |
| Page Count | 33 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19820016447 |
| Archival Resource Key | ark:/13960/t25b4xq4c |
| Language | English |
| Publisher Date | 1981-01-01 |
| Access Restriction | Open |
| Subject Keyword | Metallic Materials Thin Films Metal Surfaces Stirling Cycle Hydrogen Oxide Films Surface Properties Oxidation Porosity Permeability Stirling Engines Engine Parts Stainless Steels Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
