与其他烧结方法相比，激光烧结制备的纳米材料晶粒尺寸更为细小，组织结构更为致密。
Compared with other sintering methods, the nano-ceramic materials with the finer grain size and the higher density can be obtained by SLS technology.
TEM分析表明：复合镀层的基体为多晶镍，并且复合镀层晶粒细小，组织结构均匀、致密。
The TEM analysis shows that the matrix of composite coating is polycrystal nickel with the finer grain size, and the organization structure is homogeneous and compact.
实验表明：激光合金化层组织致密，晶粒细化，与基体呈冶金结合。
The results show that the microstructure of laser alloying zone is compact, grain is fine, and has metallurgical bonding with matrix.
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