ALLOYS OF ALUMINUM, THORIUM AND URANIUM

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The Al-rich corner of the ternary alloy system Al-- Th-U has been investigated by thermal and microscopic The creep properties of annealed Zircaloy- 2, Zircaloy3, and 15% cold-worked Zircaloy-2 at elevated temperatures were determined. The metallurgical bond formed between electropolished U and Zr cladding by hydrostatic pressing is being evaluated. Oxidation data are given for Nb and Nb alloys in dry air at various temperatures. A study of the phase relationships which occur between the please delete the above abstract===================== analyses to determine an area of low-melting alloys that could be used as a liquid metal fuel in U/sup 233/ ... continued below

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Pages: 30

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Bobeck, G.E. & Wilhelm, H.A. December 1, 1956.

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Description

The Al-rich corner of the ternary alloy system Al-- Th-U has been investigated by thermal and microscopic The creep properties of annealed Zircaloy- 2, Zircaloy3, and 15% cold-worked Zircaloy-2 at elevated temperatures were determined. The metallurgical bond formed between electropolished U and Zr cladding by hydrostatic pressing is being evaluated. Oxidation data are given for Nb and Nb alloys in dry air at various temperatures. A study of the phase relationships which occur between the please delete the above abstract===================== analyses to determine an area of low-melting alloys that could be used as a liquid metal fuel in U/sup 233/ breeder reactors. A phase diagram of this Al-rich corner of the system has been proposed. The data indicate that the binary eutectic valleys from the Al-- U and Al--Th systems meet at a point in the neighborhood of the composition of 76 wt.% Al, 18 wt.% Th, and 6 wt.% U to give a ternary eutectic which solidifies at 630 deg C. Although microstructures indicate two different primary phases as required, a third binary valley leading to this ternary eutectic has not been established. Results of the investigation show that there is a rather wide range of compositions of U and Th in Al, varying from 13 wt% U at zero wt.% Th to zero wt.% U at 25 wt.% Th, that can be maintained in a onephase liquid solution at temperatures even lower than 640 deg C. If a temperature of 650 deg C is the minimum, then an even wider variation in U and Th compositions can be tolerated for a single liquid-phase alloy. (auth)

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Pages: 30

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  • Other Information: Orig. Receipt Date: 31-DEC-58

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  • Report No.: ISC-832
  • Grant Number: W-7405-ENG-82
  • DOI: 10.2172/4311828 | External Link
  • Office of Scientific & Technical Information Report Number: 4311828
  • Archival Resource Key: ark:/67531/metadc1018311

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  • December 1, 1956

Added to The UNT Digital Library

  • Oct. 15, 2017, 10:09 p.m.

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  • Oct. 26, 2017, 6:56 p.m.

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Bobeck, G.E. & Wilhelm, H.A. ALLOYS OF ALUMINUM, THORIUM AND URANIUM, report, December 1, 1956; Ames, Iowa. (digital.library.unt.edu/ark:/67531/metadc1018311/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.