How does the morphology of different thickness alloy films changes upon heat treatment at the same temperature??
After being heated to the same temperature, different alloy films of varying thickness can change in a variety of ways in terms of morphology. Changes that might occur include:
1. Grain growth-During heat treatment, the alloy film's grains may expand in size as a result of the atoms increased mobility. The texture, roughness of the surface, and mechanical characteristics of the film may alter as a result. The initial grain size, heat treatment duration, and temperature can all affect how much grain grows.
2. Surface diffusion-High temperatures can cause the atoms on the alloy film's surface to disperse and rearrange, changing the surface morphology. The surface composition and morphology may change as a result of the selective diffusion of one phase to the surface during the heat treatment, for instance, if the alloy film comprises many phases.
3. Stress relief-As a result of the deposition process, alloy films could have residual stresses. Heat treatment may result in changes to the film's morphology by relaxing the stress. For instance, when under stress, a film with a columnar grain structure can change to one with a more equiaxed grain structure.
4. Phase transformation-Heat treatment may cause a phase transformation in some alloy films, changing the shape and composition of the film. For instance, at a particular temperature, a film with a metastable phase can shift to a stable phase, resulting in modifications to the crystal structure and surface morphology.
The composition of the alloy, the deposition technique, and the heat treatment conditions are only a few of the variables that will affect how precisely the morphology of varied thickness alloy films changes when heated at the same temperature.
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