Scholarlink

<p>Boron nitride (BN) fibers, characterized by their favorable thermal conductivity, low density, excellent thermal stability, great dielectricity and remarkable chemical inertness, hold significant promise for applications in advanced materials, especially for electromagnetic wave transmission. However, producing BN fibers with high quality and continuity through inorganic approaches is challenging. The present research first created boron oxide (B<sub>2</sub>O<sub>3</sub>) derived continuous precursor fibers with the melt spinning technique, by using boric acid as a starting material. Following this, primary BN fibers that contained residual B<sub>2</sub>O<sub>3</sub> (called BNO) together with eventual BN fibers were produced by the two-step nitridation method. This study extensively examined how the stretching process and original nitridation temperature influenced B<sub>2</sub>O<sub>3</sub> composition and phase structure. Furthermore, the orientation evolution and crystallization of continuous BN fibers were investigated, shedding light on how microstructural characteristics affect BNO and BN fibers’ mechanical characteristics. Notably, continuous BN fibers subjected to hot stretching under 1850&#xa0;°C demonstrated outstanding mechanical performances, achieving the 890.9&#xa0;MPa tensile strength and the 40.8&#xa0;GPa elastic modulus. The present research yields continuous BN fibers possessing remarkable mechanical characteristics and provides a comprehensive overview of the production as well as structural evolution, shedding more light on improving the mechanical properties of two-dimensional fibrous materials.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Evolution of micro-crystalline features and enhanced mechanical properties of continuous BN fibers

  • 期刊论文

  • 发表日期：

    2025年5月26日

查看全文
  • Xueli Qi,
  • Weichen Ding,
  • Haonan Xu,
  • Yujiao Wang,
  • Zhiqiang Cheng,
  • Zhihao Wang,
  • Jianyao Yao

摘要

Boron nitride (BN) fibers, characterized by their favorable thermal conductivity, low density, excellent thermal stability, great dielectricity and remarkable chemical inertness, hold significant promise for applications in advanced materials, especially for electromagnetic wave transmission. However, producing BN fibers with high quality and continuity through inorganic approaches is challenging. The present research first created boron oxide (B2O3) derived continuous precursor fibers with the melt spinning technique, by using boric acid as a starting material. Following this, primary BN fibers that contained residual B2O3 (called BNO) together with eventual BN fibers were produced by the two-step nitridation method. This study extensively examined how the stretching process and original nitridation temperature influenced B2O3 composition and phase structure. Furthermore, the orientation evolution and crystallization of continuous BN fibers were investigated, shedding light on how microstructural characteristics affect BNO and BN fibers’ mechanical characteristics. Notably, continuous BN fibers subjected to hot stretching under 1850 °C demonstrated outstanding mechanical performances, achieving the 890.9 MPa tensile strength and the 40.8 GPa elastic modulus. The present research yields continuous BN fibers possessing remarkable mechanical characteristics and provides a comprehensive overview of the production as well as structural evolution, shedding more light on improving the mechanical properties of two-dimensional fibrous materials.