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本文报道了用化学腐蚀法对掺质浓度不同和掺质种类不同的ＹＡＧ晶体样品进行的腐蚀，详细地观察了样品表面的腐蚀坑形貌，尤其是位错腐蚀坑的形貌和分布，测量了原生态和相应的退火样品上位错腐蚀坑的平均密度。在观测中发现，有些掺钕晶体样品上，位错腐蚀坑在中心区与边缘区的密集程度不同，有明显的分界。对此现象进行了探讨，认为出现在样品边缘区内的密集位错，除了来自于籽晶中以及来自于晶体从籽晶开始生长的起始处外，也由于熔体中出现在晶体周界处的自然对流与强迫对流边界层内的液流不稳，引起了生长界面边缘局部不稳而产生，环境气流起了相当的作用。
In this paper, the corrosion of the YAG crystal samples with different doping concentration and different doping types by chemical etching is reported. The morphology of the corrosion pits on the surface of the samples is observed in detail, especially the morphology and distribution of the dislocation corrosion pits. The average density of dislocation corrosion pits on the original and corresponding annealed samples. In the observation, it was found that in some samples doped with neodymium, the density of dislocation corrosion pits is different in the central area and the edge area, with obvious demarcation. This phenomenon is discussed and it is considered that the dense dislocations appearing in the edge region of the sample are not only from the seed crystal but also from the beginning where the crystal begins to grow from the seed crystal, The natural convection and forced convection in the boundary layer flow instability, causing the growth of the interface edge of the local instability and produce, the ambient air played a considerable role.