Amorphous boron‐rich SiBCN were prepared by high‐energy ball‐milling of the mixtures of Si, graphite, h‐BN, and inorganic boron, which acted as extra boron source. The solid‐state amorphization, thermal stability, and crystallization of the boron‐rich SiBCN were studied in detail. It was suggested that mechanical alloying can drive solid‐state amorphization but also can be an initiation step for the nucleation of nanocrystals. The amorphous networks of Si‐C, C‐B, C‐C, C‐N, B‐N, and C‐B‐N bonds are detected by XPS; however, solid‐state NMR further confirms the formation of a new chemical environment around B atoms, BC₃. The increases in boron content improve the thermal stability of SiBCN ceramics but weaken their oxidation resistance. Nano‐SiC crystallizes first while BN(C) forms subsequently. Boron promoting SiC crystallization may result from the reduced hindering effects of B‐N‐C nanodomains that retard SiC crystallization.

中文翻译：

---

依赖硼的微结构演变，热稳定性和机械合金化SiBCN的结晶

通过高能球磨Si，石墨，h-BN和无机硼（它们是多余的硼源）的混合物，制备了非晶态富硼SiBCN。详细研究了富硼SiBCN的固态非晶化，热稳定性和结晶。有人提出，机械合金化可以驱动固态非晶化，但也可以是纳米晶体成核的起始步骤。XPS检测到Si-C，C-B，C-C，C-N，B-N和C-B-N键的非晶网络; 但是，固态NMR进一步证实了围绕B原子BC ₃的新化学环境的形成。。硼含量的增加改善了SiBCN陶瓷的热稳定性，但削弱了其抗氧化性。纳米SiC首先结晶，然后形成BN（C）。促进SiC结晶的硼可能是由于B-N-C纳米域的阻碍SiC结晶的减少而产生的。