Abstract Three types of SiBCN: carbon-lean, -moderate and -rich powders with the same Si/B/N mole ratio were subjected to high-energy ball milling to yield an amorphous structure. The effects of carbon content on microstructures, solid-state amorphization, surface characteristics and thermal stability of the as-milled powders were studied in detail. Results showed that the increases in carbon content can drive solid-state amorphization accompanied by strain-induced, crystallite refinement-induced and/or chemical composition-induced nucleation of nano-SiC from an amorphous body. The specific surface area increases as carbon content increases. The amorphous networks of Si–C, C–B/C–C, C–N, B–N and C–B–N bonds that compose the amorphous nature, but the species and contents of the chemical bonds are carbon content-dependent. Carbon-moderate powders possess satisfying thermal stability while carbon-rich ones perform the worst. Mechanical alloying derived SiBCN powders have outstanding oxidation resistance below 800 °C; however only carbon-moderate powders show desirable anti-oxidation ability at higher temperatures. Thus, mechanical alloying of SiBCN appears a suitable technique for developing amorphous matrix materials for practical applications.

中文翻译：

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机械合金化衍生的 SiBCN 粉末的碳含量依赖的微观结构、表面特性和热稳定性

摘要 将Si/B/N摩尔比相同的贫碳、中碳和富碳三种SiBCN粉末进行高能球磨，得到无定形结构。详细研究了碳含量对研磨后粉末的微观结构、固态非晶化、表面特性和热稳定性的影响。结果表明，碳含量的增加可以驱动固态非晶化，伴随着应变诱导、微晶细化诱导和/或化学成分诱导的纳米 SiC 从无定形体的成核。比表面积随着碳含量的增加而增加。Si–C、C–B/C–C、C–N、B–N 和 C–B–N 键的无定形网络构成无定形性质，但化学键的种类和含量取决于碳含量. 中碳粉末具有令人满意的热稳定性，而富含碳的粉末表现最差。机械合金化衍生的 SiBCN 粉末在 800 °C 以下具有出色的抗氧化性；然而，只有中碳粉末在较高温度下表现出理想的抗氧化能力。因此，SiBCN 的机械合金化似乎是开发用于实际应用的非晶基体材料的合适技术。