High Temperature Degradation Mechanism of An Ni-Cr-Co Alloy Used during the Binary Copper Aluminium Foundary

  1. Prof. T. W. Clyne and
  2. F. Simancik
  1. Eric Beucher1 and
  2. Noël Battistelli2

Published Online: 21 DEC 2005

DOI: 10.1002/3527606203.ch26

Metal Matrix Composites and Metallic Foams, Volume 5

Metal Matrix Composites and Metallic Foams, Volume 5

How to Cite

Beucher, E. and Battistelli, N. (2000) High Temperature Degradation Mechanism of An Ni-Cr-Co Alloy Used during the Binary Copper Aluminium Foundary, in Metal Matrix Composites and Metallic Foams, Volume 5 (eds T. W. Clyne and F. Simancik), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606203.ch26

Editor Information

  1. Department of Materials Science and Metallurgy, Cambridge University, Pembroke Street, Cambridge CB2 3QZ, U.K.

Author Information

  1. 1

    CRITT Analyses & Surface - 27400 Louviers - France

  2. 2

    BRONZE ACIOR SA - 27750 La Couture Boussey - France

Publication History

  1. Published Online: 21 DEC 2005
  2. Published Print: 20 APR 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301263

Online ISBN: 9783527606207

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Keywords:

  • Ni-Cr-Co alloy;
  • high temperature degradation mechanism;
  • binary copper aluminium foundary

Summary

Scanning Electron Microscopy and Energy Dispersive Spectrometry have been used to study the high temperatures degradation mechanisms of an Ni-Cr-Co alloy. The life of this superalloy, used during aluminium bronze alloy casting, is directly related to the concentration of zinc in the aluminium bronze. In fact, the zinc deposited on the superalloy spindle is an oxidation precursor which strongly increases the formation rate of the chromium oxide (Cr2O3) and the nickel chromium spinel structure (NiCr2O4). Because of the temperature variation between 1200 °C and 700 °C during the different stages of the casting and of the stress induced, the oxide scales cracked and are progressively eliminated so that the oxidation and the superalloy degradation are more efficient.