Abstract
The mechanical properties of vacuum-deposited polycrystal and single crystal Ni films in the thickness range 2000 to 20,000 Å are presented and discussed. It was found that the average tensile strength of as-deposited polycrystalline Ni films was about 100 kg mm −2 and this is reduced by a factor two upon annealing, as a result of structural changes involving an increase of the average grain size. Single crystal films have an average strength of 50 kg mm −2 which is about twice the value for annealed bulk material (32.4 kg mm −2). No strength-thickness relationship is observed for any of the investigated Ni films in the above mentioned range of thicknesses. Electron microscopy results are presented which provide some information regarding the grain sizes and structural natures of the different types of specimens investigated.
Published Version
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