Prediction of Adhesion Energy Terms in Metal/Ceramic Systems by Using Acoustic Parameters
K. Kamli1, Z. Hadef1, A. Gacem1, N. Houaidji2
1University of 20 August 1955, 26 Road El Hadaiek, 21000 Skikda, Algeria
2Badji Mokhtar University, B.P. 12, Sidi Amar, CP 23000 Annaba, Algeria
Received: 04.07.2019; final version - 27.01.2020. Download: PDF
In this paper, we predict the adhesion energy terms in metal/ceramic systems by using acoustic parameters of these combinations. Different approaches are used. Semiempirical relations are deduced for all systems. As shown, in all cases, the adhesion energy Wad increases linearly with Rayleigh velocity of ceramic substrate VRC. It takes the form Wad = 0.07VRC + C, where the first term of this equation represents the van der Waals contribution to Wad, which only depends on VRC. The second term represents the equilibrium chemical bonds contribution (Wchem-equil) and strongly depends on the systems combination as well as on the energy gap of the ceramics substrate. Moreover, the Wchem-equil energy is higher for small bandgap ceramic materials due to substantial charge carriers’ density inside ceramic crystal and, consequently, ease and height electron transfer through the metal/ceramic interface. In this case, the Wchem-equil is essentially depends on Rayleigh velocity VRM of deposited metal. For large bandgap ceramic materials, there are practically no free charges inside ceramic crystal. In this case, the electrons’ transfer cannot be taking place and, as a result, the Wchem-equil contribution is negligible. The importance of obtained relation lies in its universality and applicability to all investigated systems.
Key words: adhesion, metal/ceramic interfaces, energy gap, acoustic parameters.
URL: http://mfint.imp.kiev.ua/en/abstract/v42/i05/0717.html
DOI: https://doi.org/10.15407/mfint.42.05.0717
PACS: 43.20.+g, 68.08.-p, 68.35.Md, 68.35.Np, 68.60.Bs, 71.20.Nr
Citation: K. Kamli, Z. Hadef, A. Gacem, and N. Houaidji, Prediction of Adhesion Energy Terms in Metal/Ceramic Systems by Using Acoustic Parameters, Metallofiz. Noveishie Tekhnol., 42, No. 5: 717—731 (2020)