U. S. ELECTRODE WALL FOR TESTING IN THE U. S. S. R. U-02 MHD FACILITY.

In accordance with the US-USSR Cooperative program in the field of high temperature MHD materials joint tests of an MHD channel consisting of U. S. designed electrode walls and U. S. S. R. insulating walls were conducted at the Soviet U-02 MHD facility in Moscow from September 23 to October 1, 1975. The tests were used to demonstrate electrochemical stability, bulk structural integrity and electrode design feasibility of ceramic materials under clean fuel, alkali seed, hot wall conditions. The design, specification of materials, and construction of the electrode module and the material fabrication processes constitute a significant part of the overall program. Design of the electrode wall and material selections were synergistically combined to meet the principal objective, a 100-hour test. A segmented Faraday-type MHD generator was utilized to test five different oxide ceramic electrode materials and a single insulator material, magnesium oxide.