Thermal Stress Analysis of Large Area Diamond Films
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摘要: 應用實際工作狀態的邊界條件計算了金剛石膜中的熱應力分布,并用實驗手段進行了驗證.結果認為,金剛石膜的熱應力沿徑向是不均勻的,中間的熱應力要比邊部的大,主要是壓應力.這種很大的壓應力,容易引起金剛石膜的炸裂.Abstract: The distribution of the thermal stress of large area diamond films is given by applying the actual boundary condition, and it is checked by experiments. The result is that the thermal stress of large area diamond films is not uniform, the thermal stress in the middle of large area diamond films is lager than that in the edge of large area diamond films, the press stress is the mainly part of the thermal stress. The crack of diamond films is mainly duo to the large press stress.
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Key words:
- large area diamond films /
- the thermal stress /
- numerical calculation
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