The morphologies , microstructures , interface structure and the distribution of the ZrC particles in the clad layers were observed with optical microscopy , field emission electric scanning microscopy ( FEEM ) .
利用光学显微镜、场发射电子扫描显微镜（能谱仪）和金相组织分析系统，对熔覆层显微组织、硬质颗粒的成分及其分布规律进行了观察与分析。
feem