采用透射电镜(TEM)对稀土铸铁薄膜试样进行了分析研究,球墨和蠕墨经离子轰击后留下的“年轮”状纹理和平行条纹与石墨晶体<0001>方向相互垂直的关系得到了实验证实。通过微区分析还发现球墨内部的角锥体是由许多取向略有差异的微晶所构成。此外,还对石墨晶体的衍衬象中所出现的波纹图等现象进行了分析,认为它们是由于石墨中存在的孪晶所造成的。
The thin foil samples of rare earth treated cast iron. were analysed by means of TEM. The results confirmed that the <0001> direction of graphite crystal is perpendicular to the "annual ring" lines revealed by ion bombardment. Each cone in a nodular graphite is composed of many microcrystallites with a small angle each other in their orientations. The morie patterns in the TEM picture of the graphite were also analysed. It is considered that they result from some structure defects such as twins existing in the graphite.
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