Abstract
Eutectic Pb - Li is a leading candidate for current fusion blanket concepts as a coolant. However, there is very little data about the compatibility of most materials with Pb - Li above 500°C where the dissolution rate of many conventional alloys increases rapidly. Current work is beginning to assess Pb - Li compatibility from 500 to 800° C using isothermal capsule experiments. Aluminide coatings hold some promise in protecting conventional Fe-base alloys at 600 - 700° C. However, there is a significant initial Al loss that has not been clearly explained. Furthermore, the reaction product with coated materials is LiAlO 2 rather than Al 2O 3 at 600° and 700° C. Even when pre-oxidized to form α-Al 2O 3 , an alumina layer on FeCrAl transformed to LiAlO 2 at 700° and 800°C. At 500°C, the preformed oxide partially transformed from alumina and some Li was detected in the oxide layer.
Original language | English |
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Pages (from-to) | 129-135 |
Number of pages | 7 |
Journal | Materials at High Temperatures |
Volume | 29 |
Issue number | 2 |
DOIs | |
State | Published - Jun 2012 |
Keywords
- Aluminide coating
- Pb - Li compatibility