Journal of Materials Science

, Volume 13, Issue 7, pp 1576–1582 | Cite as

The monotectic reaction in Cu-Nb alloys

  • J. D. Verhoeven
  • E. D. Gibson


The solidification of Cu-Nb alloys has been studied by a chill casting technique. Formation of small spherical particles, termed spheroids, was observed at compositions of 15 and 20 wt % Nb, and comparison to similar particles found in chill cast Cu-Pb alloys presents evidence that the spheroids are produced by a monotectic reaction. It is shown that the spheroids are induced by oxygen impurities in the alloys and that their formation is also promoted by high solidification rates. A mechanism for spheroid formation is postulated.


Oxygen Polymer Spherical Particle Solidification Rate Casting Technique 
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Copyright information

© Chapman and Hall Ltd. 1978

Authors and Affiliations

  • J. D. Verhoeven
    • 1
  • E. D. Gibson
    • 1
  1. 1.Ames Laboratory-DOE and Department of Materials Science and EngineeringIowa State UniversityAmesUSA

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