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METAL/CERAMIC INTERFACE ENGINEERING - ADHESION STRENGTH MEASUREMENT BETWEEN DIELECTRIC CERAMIC AND ELECTRODE METAL

Abstract : The present study investigates the mechanical strength of metal/oxide interface. Ceramic was commercial available BaTiO3. Silver and nickel pastes are used as the metal materials. The metal film was prepared by screen-printing. Specimens with Ag or Ni layer, fabricated at different sintering temperatures, covering dense BaTiO3 substrates with different surface roughness have been prepared with a special geometry appropriate for blister and indentation testing.
The blister test technique allows numerical estimation of interfacial adhesion strength through determination of the interfacial crack propagation energy. A simple method is proposed to correct for generalized plastic straining of silver layer. The average value of Ag/BaTiO3 adhesion strength ranges from 4 J/m2 to 7 J/m2 according to the firing temperature of Ag. For Ni film fired at 1200°C for 2 h on dense barium titanate, the average value is about 1 J/m2
Three indentation tests are developed to measure critical energy release rate of the same metal/oxide interfaces. The average Gci of Ag/BaTiO3 interface is about 0.5 J/m2 according to normal and interface indentation tests. Cross-sectional indentation test has been also successfully performed and a new model for analysis of its results is developed. The average Gci of Ag/BaTiO3 interfaces are obtained from 1 J/m2 to 3 J/m2 according to the models.
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https://tel.archives-ouvertes.fr/tel-00178445
Contributor : Chao-Yu Lee <>
Submitted on : Thursday, October 11, 2007 - 11:16:13 AM
Last modification on : Thursday, November 19, 2020 - 3:54:17 PM
Long-term archiving on: : Sunday, April 11, 2010 - 10:45:31 PM

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  • HAL Id : tel-00178445, version 1

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Chao-Yu Lee. METAL/CERAMIC INTERFACE ENGINEERING - ADHESION STRENGTH MEASUREMENT BETWEEN DIELECTRIC CERAMIC AND ELECTRODE METAL. Mechanics [physics.med-ph]. Université Joseph-Fourier - Grenoble I; National Taiwan University, Taipei (Rep. of China), 2007. English. ⟨tel-00178445⟩

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