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采用非平衡磁控溅射方法在316L不锈钢表面制备了不同形态与组织结构的铝膜,以该铝膜为模板,通过阳极氧化的方法,在316L不锈钢基体上制备了微孔。研究了铝膜的组织结构对不锈钢表面微孔形成的影响,并分析了基体上微孔的形成机制。结果表明,铝膜结构对微孔制备存在显著影响。当镀铝层晶粒细小、结构致密时,经过阳极氧化后,基体表面上能形成适于承载缓释药物的密度大、孔径小、形状规则的微孔;当镀铝层组织疏松多孔时,在基体表面生成的孔形状不规则,孔径大、密度小。
Unbalanced magnetron sputtering was used to prepare aluminum films with different morphologies and microstructures on the surface of 316L stainless steel. The aluminum film was used as a template to prepare micropores on 316L stainless steel substrate by anodic oxidation. The effect of microstructure of aluminum film on the formation of micropores on the surface of stainless steel was studied. The formation mechanism of micropores on the substrate was analyzed. The results show that the aluminum film structure has a significant impact on the micropore preparation. When the aluminized layer is fine in grain size and compact in structure, after the anodization, the micropores with large density, small pore size and regular shape which are suitable for bearing slow release drug can be formed on the surface of the substrate; when the aluminized layer is loose and porous, The holes generated on the surface of the substrate are irregular in shape, large in pore size and small in density.