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Structure and hardness of a-C:H films prepared by middle frequency plasma chemical vapor deposition

机译:中频等离子体化学气相沉积制备a-C:H薄膜的结构和硬度

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摘要

a-C:H films were prepared by middle frequency plasma chemical vapor deposition (MF-PCVD) on silicon substrates from two hydrocarbon source gases, CH_4 and a mixture of C_2H_2 +H2, at varying bias voltage amplitudes. Raman spectroscopy shows that the structure of the a-C:H films deposited from these two precursors is different. For the films deposited from CH_4, the G peak position around 1520 cm~(-1) and the small intensity ratio of D peak to G peak (J(D)//(G)) indicate that the C-C sp~3 fraction in this film is about 20at.%. These films are diamond-like a-C:H films. For the films deposited from C_2H_2 + H_2, the Raman results indicate that their structure is close to graphite-like amorphous carbon. The hardness and elastic modulus of the films deposited from CH_4 increase with increasing bias voltage, while a decrease of hardness and elastic modulus of the films deposited from a mixture of C_2 H_2 + H_2 with increasing bias voltage is observed.
机译:通过中频等离子体化学气相沉积(MF-PCVD)在硅基板上由两种碳氢化合物原料气CH_4和C_2H_2 + H2的混合物以不同的偏置电压幅度制备a-C:H膜。拉曼光谱表明从这两种前体沉积的α-C:H薄膜的结构不同。对于由CH_4沉积的薄膜,其G峰位置在1520 cm〜(-1)附近,并且D峰与G峰的强度比较小(J(D)//(G))表明,CC sp〜3分数在该膜的含量约为20at。%。这些薄膜是类金刚石a-C:H薄膜。对于由C_2H_2 + H_2沉积的薄膜,拉曼结果表明其结构接近于类石墨无定形碳。由CH_4沉积的薄膜的硬度和弹性模量随偏压的增加而增加,而由C_2 H_2 + H_2的混合物沉积的薄膜的硬度和弹性模量随偏压的增加而降低。

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  • 来源
    《Applied Surface Science》 |2011年第10期|p.4738-4742|共5页
  • 作者单位

    State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China;

    National Key Laboratory of Science and Technology on Precision Hot Processing of Metals Harbin Institute of Technology, Harbin 150001, China School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China;

    School of Material Science & Engineering, Harbin Institute of Technology, Harbin 150001, China;

    State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China;

    National Key Laboratory of Science and Technology on Precision Hot Processing of Metals Harbin Institute of Technology, Harbin 150001, China;

    School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China;

    School of Material Science & Engineering, Harbin Institute of Technology, Harbin 150001, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    a-C:H films; MF-PCVD; Structure; Hardness; Elastic modulus;

    机译:a-C:H胶片;MF-PCVD;结构体;硬度;弹性模量;

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