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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
Papers

Abstract

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.

Keywords

Polymer Al2O3 Contact Angle Oxygen Atom Material Processing 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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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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