在微纳观尺度,利用SEM、TEM和HR-TEM观察了难熔碳化物( ZrC)和树脂基炭经2500℃以上高温处理后的显微组织结构。结果表明：ZrC颗粒表面包裹了一层取向和生长良好的石墨微晶炭过渡层。其中炭过渡层中晶体的层间距d002为0.3375 nm,而没有包裹ZrC颗粒的树脂基炭仍然是各向同性结构。结合选区电子衍射结果可知,ZrC颗粒在高温下对树脂基炭有催化石墨化和诱导石墨化效应。
The microstructures of a refractory ZrC particle and its surrounding resin-based carbon treated above 2500°C were in-vestigated by SEM, TEM, HR-TEM and selected area electron diffraction. Results show that the ZrC particle is enclosed by a tran-sition carbon layer that has a d002 of 0. 3375 nm, close to that of ideal graphite, indicating the formation of a well graphitized struc-ture. The carbon far away from the ZrC particle remains isotropic and amorphous. These results are verified by selected area electron diffraction, and can be attributed to catalytic graphitization and stress-induced graphitization.
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