Design and Test of Selected High-Temperature Electrode Materials.
Abstract
This report describes progress achieved on the design, fabrication, assembly, and test of four different electrode materials which were intended to cover the range of cold, intermediate and hot electrode operation. Included were LaCrO3 with strontium additions, calcia stabilized ZrO2, Hastelloy-X, and copper. The tests were designed to evaluate the electrode materials for improved power performance, reduced electrode voltage drop through reduced thermal barrier, and improved life. Also included in this report are details on an attempt to use a plasma-sprayed ceramic coating to reduce thermal losses in the MHD combustor. As a result of this program, it was concluded that Hastelloy-X or a similar superalloy should be considered for use as a future MHD-channel electrode material, particularly for pulse mode operation. Other advantages of superalloys over ceramic materials are longevity and ease of fabrication. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1974
- Accession Number
- AD0786677
Entities
People
- John Lytle
- Lester W. Buechler
- R. Shanklin
- Robert A. Nimmo