摘要
详细介绍了偏振光产生的基本原理及其在表征热解炭光学各向异性程度上的应用。它能把消光角的测量直接反映出热解炭的光学各向异性程度。消光角的大小直接反映了微观织构的取向程度 :消光角越大 ,织构取向越好 ,微观组织越光滑平整 ,而在偏振光下图像层次感越丰富 。
This paper deals with the basic principles of polarized light microscopy(PLM) observation used for anisotropy measurement of pyrolytic carbon. Three kinds of samples of rough laminar pyrocarbon, smooth laminar pyrocarbon and isotropic pyrocarbon were chosen to perform the extinction angle measurement under PLM. Results showed that the extinction angle reflected the degree of anisotropy of pyrocarbon. The higher the extinction angle, the higher of the anisotropy of laminar pyrocarbon, and the better preferred orientation were found in laminar pyrocarbon. And because of the existence of the growth cones (columnar texture) issued from the substrate or from the deposit itself, the Maltese cross under PLM was strongly disrupted by the cones, so that the rough laminar carbon's appearance was rough.
出处
《理化检验（物理分册）》
CAS
2002年第11期501-506,共6页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
