• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Surface Science >Preparation and characterization of boron nitride coatings on carbon fibers from borazine by chemical vapor deposition
【24h】

Preparation and characterization of boron nitride coatings on carbon fibers from borazine by chemical vapor deposition

机译：硼嗪在碳纤维上氮化硼涂层的化学气相沉积制备与表征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Boron nitride (BN) coatings were deposited on carbon fibers by chemical vapor deposition (CVD) using borazine as single source precursor. The deposited coatings were characterized by scanning electron microscopy (SEM), Auger electron spectroscopy (AES), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. The effect of temperatures on growth kinetics, morphology, composition and structure of the coatings was investigated. In the low temperature range of 900℃-1000℃, the growth rate increased with increasing temperature complying with Arrhenius law, and an apparent active energy of 72 kj/mol was calculated. The coating surface was smooth and compact, and the coatings uniformly deposited on individual fibers of carbon fiber bundles. The growth was controlled by surface reaction. At 1000℃, the deposition rate reached a maximum (2.5μm/h). At the same time, the limiting step of the growth translated to be mass-transportation. Above 1100℃, the growth rate decreased drastically due to the occurrence of gas-phase nucleation. Moreover, the coating surface became loose and rough. Composition and structure examinations revealed that stoichiometric BN coatings with turbostratic structure were obtained below 1000℃, while hexagonal BN coatings were deposited above 1100℃. A penetration of carbon element from the fibers to the coatings was observed.
机译：氮化硼（BN）涂层使用硼嗪作为单源前体通过化学气相沉积（CVD）沉积在碳纤维上。通过扫描电子显微镜（SEM），俄歇电子能谱（AES），X射线衍射（XRD），傅里叶变换红外光谱（FTIR）和拉曼光谱来表征沉积的涂层。研究了温度对涂层生长动力学，形态，组成和结构的影响。在900℃-1000℃的低温范围内，生长速率随着温度的增加而增加，符合阿伦尼乌斯定律，并计算出表观有功电能为72 kj / mol。涂层表面光滑致密，涂层均匀地沉积在碳纤维束的单根纤维上。通过表面反应控制生长。在1000℃下，沉积速率达到最大值（2.5μm/ h）。同时，增长的限制步骤转化为大规模运输。在1100℃以上，由于气相成核的出现，生长速率急剧下降。而且，涂层表面变得疏松和粗糙。组成和结构检查表明，在1000℃以下可获得具有涡轮层状结构的化学计量BN涂层，而在1100℃以上可获得六方形BN涂层。观察到碳元素从纤维到涂层的渗透。

著录项

  • 来源
    《Applied Surface Science》 |2011年第17期|p.7752-7757|共6页
  • 作者

    Jun-Sheng Li; Chang-Rui Zhang; Bin Li;

  • 作者单位

    State Key Laboratory of Advanced Ceramic Fibers & Composites, College of Aerospace & Materials Engineering, National University of Defense Technology,Changsha, 410073, PR China;

    State Key Laboratory of Advanced Ceramic Fibers & Composites, College of Aerospace & Materials Engineering, National University of Defense Technology,Changsha, 410073, PR China;

    State Key Laboratory of Advanced Ceramic Fibers & Composites, College of Aerospace & Materials Engineering, National University of Defense Technology,Changsha, 410073, PR China;

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

    borazine; chemical vapor deposition; boron nitride; coatings; interphase; kinetics;

    机译：硼嗪化学气相沉积;氮化硼涂料;相间动力学;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号