Regarding Morse parameters for an alloy

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1

Thanks Mr. Steve,
I think this is trial and error based to obtain the shape of the potential.

As I have to mix the potential parameters for both these materials, does it depend upon the percentage in which they occur in the alloy.
For example, In this alloy Be is 2% in Copper. For 2% Be or any other percentages, Will potential parameters remain the same?

Can LJ potential be used for metallic/alloy system for interaction between alloying elements(as it is only suitable for inert gases)?

2

Simple pairwise potentials like Morse are not typically parameterized

for the composition fraction of an alloy. Any two Cu/Be atoms interact

the same way, no matter how many such pairs there are.

More sophisticated many-body potentials account for the composition
of the local environment

around the pair

3

Posted too quick: