Journal of Materials Science

, Volume 30, Issue 14, pp 3619–3624 | Cite as

Wetting and adhesion of Ni-Al alloys on α-Al2O3 single crystals

  • V. Merlin
  • N. Eustathopoulos


The effect of Al additions on the wetting and adhesion of Ni on an α-Al2O3 single crystal was studied. Contact angles were measured by the sessile drop technique under vacuum or in He atmosphere. The morphological and chemical features of metal-vapour and metal-oxide interfaces were determined by scanning electron microscope (SEM), microprobe analysis and profilometry. The work of adhesion of Ni-Al alloys on Al2O3 substrates was significantly higher than for pure Ni and Al components. This result was explained by co-operative adsorption of aluminium and oxygen atoms at the Ni-Al2O3 interface. The influence of oxidation of the alloy on wetting and bonding is also discussed.


Polymer Al2O3 Contact Angle Oxygen Atom Material Processing 
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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • V. Merlin
    • 1
  • N. Eustathopoulos
    • 1
  1. 1.LTPCM, INP GrenobleSaint Martin d'Hères CedexFrance

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