Considering an Al-SiC Matrix composite:
In wetting of reinforcement particles, does the surface energy of aluminium and SiC is modified or a layer of wetting substance plays role in adhering of materials.
As long as no physico-chemical reaction takes place between the wetting layer and the contact surfaces one can't speak of any change in the surface properties of the contacting adjoin surfaces. If this wetting layer would be very thin in the order of few Angstrom thickness then as a first order approximation we may assume that it acts as an interface between two adjoin contact surfaces having its own interfacial free energy, and then treat the problem accordingly.
Could any one explain me in detail regarding role of contact angle in wettability of reinforcement in metal matrix. And how could one alter the contact angle to suit the best.
Of course. Any adsorption on solid material changes (lowers) its free energy
I want to understand more in depth with regards to contact angle and its affecting parameters.
The contact angle and the dynamics of triple junctions are thoroughly elaborated while developing the Irreversible thermodynamics of surfaces and interfaces by Ogurtani in the following two papers. The same topic later was enlarged to cover up the thickness dependent surface free energies associated with ultra-thin films in connection with Quantum Dot formations using variation formalism (See. Appendix of Last Paper)
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