Chemical interactions between candidate radiator materials and simulated lunar basalt at temperatures up to 1273 K

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The reactivity of various metal substrates with simulated lunar basalt was studied by mass balance. Candidate materials were submerged in simulated lunar basalt powder and heated to temperatures in excess of 1273 K. After exposure, energy dispersive x-ray analysis was used to provide supporting evidence of the elemental composition of the metal substrates. Niobium, niobium-1% zirconium, and UDIMET (Registered Mark) 720 gained weight as a result of the high temperature exposure to the basalt and energy dispersive x-ray analysis revealed the presence of iron in these substrates, suggesting that iron diffused from the basalt to the metal substrate. In addition, the basalt lost weight as a result of the high temperature exposure, suggesting the evolution of a volatile species. Other substrates, such as molybdenum and carbon showed no change in weight as a result of the high temperature exposure to the basalt. The results of the high temperature testing using the simulated lunar basalt will be discussed.

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