Prediction of Adhesion Energy Terms in Metal/Ceramic Systems by Using Acoustic Parameters
K. Kamli$^{1}$, Z. Hadef$^{1}$, A. Gacem$^{1}$, N. Houaidji$^{2}$
$^{1}$University of 20 August 1955, 26 Road El Hadaiek, 21000 Skikda, Algeria
$^{2}$Badji 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 $W_{\textrm{ad}}$ increases linearly with Rayleigh velocity of ceramic substrate $V_{RC}$. It takes the form $W_{\textrm{ad}}$ = 0.07$V_{RC}$ + $C$, where the first term of this equation represents the van der Waals contribution to $W_{\textrm{ad}}$, which only depends on $V_{RC}$. The second term represents the equilibrium chemical bonds contribution ($W_{\textrm{chem-equil}}$) and strongly depends on the systems combination as well as on the energy gap of the ceramics substrate. Moreover, the $W_{\textrm{chem-equil}}$ 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 $W_{\textrm{chem-equil}}$ is essentially depends on Rayleigh velocity $V_{RM}$ 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 $W_{\textrm{chem-equil}}$ 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)