激光熔覆多孔生物陶瓷涂层的分形维数分析
1. 凯里学院, 先进功能材料重点实验室, 贵州凯里 556011
2. 凯里经济开发区高级实验中学, 贵州凯里 556011
| 摘 要： | 为解决激光熔覆多孔生物陶瓷涂层表面不规则孔结构难以用传统欧氏几何进行描述的问题，本文创造性地采用扫描电子显微镜(SEM)对一定优化工艺条件下激光熔覆多孔梯度生物陶瓷涂层表面的孔结构形貌进行了表征，利用图像处理软件Image J对SEM图像进行处理并统计分析孔结构参数，进而通过典型的面积-周长法测试分析了涂层表面孔结构的分形维数，对其不规则孔结构进行了系统描述。研究结果表明，该方法原理简单、可操作性强，可对涂层粉末中造孔剂添加量在2.5-10wt.%范围的激光熔覆多孔梯度生物陶瓷涂层不规则的孔结构进行描述，对应于2.5, 5, 7.5, 10wt.% 涂层的孔结构分形维数计算结果分别为：1.344、1.352、1.394、1.34，其中7.5wt.%涂层的分形维数最高，这意味着7.5%造孔剂添加量的涂层孔结构最复杂且孔隙数量也最多。 |
| 关 键 词： | 分形维数; 多孔; 生物陶瓷涂层; 激光熔覆 |
| DOI： | 10.57237/j.mater.2022.02.002 |
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收稿日期: 2022-11-20
接受日期: 2022-12-26
在线出版日期: 2022-12-27
Fractal Dimension Analysis of Laser-coated Porous Bioceramic Coatings
1. Key Advanced Functional Laboratory of Kaili University, Kaili 556011, China
2. Experimental High School of Kaili, Economic Development Zone of Kaili, Kaili 556011, China
| Abstract: | In order to solve the problem that the irregular pore structure of the surface of porous bioceramic coating prepared by laser cladding under a certain optimized optimal process parameters is difficult to describe with traditional Euler geometry. In this paper, the pore structure morphology of the bioceramic coating surface was tested by scanning electron microscopy (SEM) creatively, and the SEM image of the coating surface was processed to statistically analysis the pore structure parameters by the picture software Image J, and then the fractal dimension (Df) of the pore structure was tested by the classic area-perimeter (A-P) method, and the irregular pore structure was successfully systematically described. The research results show that the principle of the method is simple and operable, and the pore structure of the coating in the range of 2.5-10wt.% can be described by the Df value, which is related to the size and the complexity of the pore structure of the bioceramic coating. Corresponding to the pore structure of the 2.5, 5, 7.5 and 10wt.% bioceramic coating respectively, the fractal dimensions is 1.344, 1.352, 1.394 and 1.34, respectively. In which, the Df value of the 7.5wt.% coating is the highest, it was suggested that pore structure of the coating with 7.5% pore additive addition also has the largest number of pores in the most complex pore structure. |
| Keywords: | Fractal Dimension; Porous; Bioceramic Coating; Laser Cladding |
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