Material compatibility with isothermal Pb - Li

Bruce A. Pint, Larry R. Walker, Kinga A. Unocic

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

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 languageEnglish
Pages (from-to)129-135
Number of pages7
JournalMaterials at High Temperatures
Volume29
Issue number2
DOIs
StatePublished - Jun 2012

Keywords

  • Aluminide coating
  • Pb - Li compatibility

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