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Diamond and related materials v.81, 2018년, pp.127 - 132   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Overcoming selective interfacial bonding and enhancing thermal conductivity of diamond/aluminum composite by an ion bombardment pretreatment

Yang, Wulin (College of Materials Science and Engineering, Hunan University, Changsha 410082, China ) ; Sang, Jianquan (College of Materials Science and Engineering, Hunan University, Changsha 410082, China ) ; Zhou, Lingping (College of Materials Science and Engineering, Hunan University, Changsha 410082, China ) ; Peng, Kun (College of Materials Science and Engineering, Hunan University, Changsha 410082, China ) ; Zhu, Jiajun (College of Materials Science and Engineering, Hunan University, Changsha 410082, China ) ; Li, Deyi (College of Materials Science and Engineering, Hunan University, Changsha 410082, China ) ;
  • 초록  

    Abstract Low energy Ar + ion beam bombardment is adopted as a pretreatment process of diamond particles for fabricating diamond/aluminum composite. We demonstrate that the combined effects of higher defect density and concentration of oxygen functional groups on diamond {100} plane lead to a selective interfacial bonding in the raw diamond/aluminum composites. It limits the thermal transfer performance of the composite. With the help of ion implantation and cleaning effects, similar diamond surface states are obtained by a conversion of sp 3 C to sp 2 C which occurs on both the diamond {100} and {111} planes simultaneously. The similar surface states are beneficial for the aluminum matrix adhered to the bombarded diamond surface uniformly during the interfacial reaction. Furthermore, the mean interfacial thermal conductance between the bombarded diamond particles and the matrix reaches up to 9.3×10 7 W·m −2 ·K −1 . The thermal conductivity of the diamond/aluminum composite is improved significantly to 713W·m −1 ·K −1 , indicating that low energy ion beam bombarded is a promising approach for further improving the interfacial bonding and the thermal conductivity of the diamond/aluminum composite. Highlights The irradiation effect of the Ar + ion beam on diamond particle was investigated. The selective interfacial bonding in the diamond/aluminum composite was overcome. The mechanism of diamond surface modification was proposed. The thermal conductivity of the composite reached up to 713W·m −1 ·K −1 . Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Diamond composite .   Ion bombardment .   Surface characterization .   Thermal properties.  

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