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Stress Relaxation During Diffusional Phase Transformation Under Induced Thermal Stress

  • E C Zingu (a1) and B T Mofokeng (a1)

Thermal mismatch between the expansion coefficients of a substrate and deposited thin film gives rise to extrinsic stress in the film. Different stress states are induced into the Co/Si thin film combination by depositing the multi-layers on Al and Si substrates respectively. Interdiffusion at 360°C is found to be influenced by the extrinsic stress in the films. The difference in Co2Si growth rate on different substrates is ascribed to the difference in composition (Co molar fraction) at the Co/Co2Si and Co2Si/Si interfaces due to different stress states.

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  • ISSN: -
  • EISSN: 1946-4274
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