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Lifetimes of Electrodes for AMTEC CellsThe lifetime of an AMTEC electrode depends on the rate of grain growth, which in turn depends on the surface self-diffusion coefficient of the electrode material under AMTEC operating conditions. Grain growth rates for molybdenum and platinum-tungsten alloy electrodes have been determined, and have been used to predict operating lifetimes of AMTEC electrodes. For lifetimes of 10 years of more, Mo may be used in AMTEC cells only at operating temperatures under 1100 K. Pt(sub 2.5)W electrodes may be used at much higher temperatures, up to 1300 K.
Document ID
20060038516
Acquisition Source
Jet Propulsion Laboratory
Document Type
Preprint (Draft being sent to journal)
External Source(s)
Authors
Ryan, M. A.
Kisor, A.
Williams, R F.
Jeffries-Nakamura, B.
O'Connor, D.
Date Acquired
August 23, 2013
Publication Date
August 8, 1994
Subject Category
Solid-State Physics
Distribution Limits
Public
Copyright
Other
Keywords
lifetime surface self-diffusion coefficient
AMTEC thermoelectric converters molybdenum platinum tungsten grain growth

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