News from IPNS

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Niobium-base alloys are candidate materials for the dive structure in fusion reactors. For this application, the materials should exhibit resistance to aqueous corrosion, hydrogen embrittlement, and radiation damage and should have high thermal conductivity and low thermal expansion. Results of corrosion and embrittlement screening tests of several binary and ternary alloys in high-temperature water indicated that Nb-1Zr, Nb-5Mo-1Zr and Nb-5V-1Zr (wt.%) showed sufficient promise for further investigation. These alloys, together with pure Nb and Zircaloy-4, have been exposed to high-purity water containing a low concentration of dissolved oxygen (<12 ppb) at 170, 230, and 300C for up to {approx}3200 h. ... continued below

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9 p.

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Brown, B.S. December 31, 1995.

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Description

Niobium-base alloys are candidate materials for the dive structure in fusion reactors. For this application, the materials should exhibit resistance to aqueous corrosion, hydrogen embrittlement, and radiation damage and should have high thermal conductivity and low thermal expansion. Results of corrosion and embrittlement screening tests of several binary and ternary alloys in high-temperature water indicated that Nb-1Zr, Nb-5Mo-1Zr and Nb-5V-1Zr (wt.%) showed sufficient promise for further investigation. These alloys, together with pure Nb and Zircaloy-4, have been exposed to high-purity water containing a low concentration of dissolved oxygen (<12 ppb) at 170, 230, and 300C for up to {approx}3200 h. Weight-change data, microstructural observations, and qualitative mechanical-property evaluations reveal that Nb-5V-1Zr is the most promising alloy at higher temperatures. Below {approx}200C the alloys exhibit similar corrosion behavior.

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9 p.

Notes

INIS; OSTI as DE96004289

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  • ICANS-XIII: 13. international collaboration on advanced neutron sources, Villigen (Switzerland), 11-14 Oct 1995

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  • Other: DE96004289
  • Report No.: ANL/IPNS/CP--88087
  • Report No.: CONF-9510212--20
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 198898
  • Archival Resource Key: ark:/67531/metadc669184

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  • December 31, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Dec. 16, 2015, 12:59 p.m.

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Brown, B.S. News from IPNS, article, December 31, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc669184/: accessed October 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.