在本研究中，采用碳膜复型技术提取析出相,在抛光后的样品表面喷碳膜。将碳膜分割成2 mm×2 mm的正方形。在4 ml HNO3 + 96 ml CH3CH2OH 混合溶液浸蚀使碳膜脱落，用铜网打捞带有析出相颗粒的碳膜，在CH3CH2OH清洗干净，放入等离子水中，用φ3的小铜网打捞碳膜。使用透射电子显微镜(附带能谱分析仪EDS)进行观察。样品中发现大量纳米级的(Nb,V,Mo)C析出相。

In this study, the carbon film replication technology was used to extract the precipitated phase, and the carbon film was sprayed on the surface of the polished sample. The carbon film is divided into 2 mm × 2 mm squares. In 4 ml HNO3 + 96 ml CH3CH2OH mixed solution etching to make the carbon film fall off, with copper net to salvage carbon film with precipitated phase particles, in CH3CH2OH clean, into the plasma water, with φ3 small copper net to salvage carbon film. Observations were performed using a transmission electron microscope with an energy dispersive spectrometer ( EDS ). A large number of nanoscale ( Nb, V, Mo ) C precipitates were found in the samples.