氮化硼
材料科学
纳米复合材料
化学气相沉积
纳米技术
化学工程
退火(玻璃)
催化作用
陶瓷
硼
氮化物
冶金
化学
图层(电子)
有机化学
工程类
作者
Heng Wang,Man Xu,Hang Ping,Zhengyi Fu
摘要
Abstract Boron nitride nanocomposites assembled by nanosheets and nanotubes can exert multi‐dimensional synergistic toughening and strengthening effects. This material is expected to be a high‐efficiency reinforcement additive in advanced structural ceramics. In this study, we designed a universal method for synthesizing gram‐scale boron nitride nanocomposites by annealing the precursor containing catalyst in chemical vapor deposition equipment under flowing ammonia, and a combined growth mechanism of surface‐diffusion and solid‐liquid‐solid is proposed. The boron nitride nanosheets were initially formed by a surface‐diffusion reaction between boron trioxide and ammonia at 1300°C. At elevated temperatures (1400°C‐1500°C), the boron nitride nanotubes grew in‐situ from the nanosheets in the presence of catalysts through a solid‐liquid‐solid mechanism, forming the desired boron nitride nanocomposite.
科研通智能强力驱动
Strongly Powered by AbleSci AI