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氮分压对Ta-N薄膜摩擦性能的影响

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Abstract:

在氮气和氩气的混合气氛中,在不同N2分压下,用直流磁控溅射法在Si基片上沉积非晶态Ta-N薄膜。利用X射线衍射仪、原子力显微镜、台阶仪和纳米压痕仪、光学轮廓仪和扫描电子显微镜对沉积的薄膜进行表征。结果表明不同N2分压下沉积的薄膜都有平整且致密的表面,表面均方根粗糙度都较小;随着N2分压的上升,薄膜沉积速率、纳米硬度和弹性模量都随之下降。所制备薄膜在室温、空气环境中具有稳定的滑动摩擦因数;当N2分压为混合气体的10%(体积分数)时,薄膜的摩擦因数最低,仅为0.27,但由于硬度较低,其磨损也相对较为严重。

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