Current Status of Application of Fractal Theory and Methods in Thermal Spray Coating Research

• Published in: Cai liao bao hu Vol. 58; no. 8; pp. 69 - 79
• Main Author: WANG Rui, WANG Hai, LI Jiaqi, WANG Haidou, SUN Xiaofeng, MA Guozheng, LIU Jian, GUO yongming
• Format: Journal Article
• Language: Chinese
• Published: Editorial Department of Materials Protection 01.08.2025
• Subjects: thermal spraying; bonding interface; fractal theory; fractal characterization
• ISSN: 1001-1560
• DOI: 10.16577/j.issn.1001-1560.2025.0134

Thermal spraying technology is one of the key supporting technologies of remanufacturing, and the heterogeneous interface between thermal spray coating and substrate has a significant impact on the coating performance. As an effective means to characterize the morphology of complex structures, fractal has been widely used in the field of materials science. The surface of thermal spray coatings and the interface between substrate and coating inherently exhibit self-similarity and fractal characteristics, so it is of great significance to study thermal spray coatings using fractal theory and methods. In this paper, the fractal dimension characterization of spray coatings, bonding interfaces, coating properties, and coating deposition growth mechanisms was systematically reviewed. The quantitative relationship between surface fractal dimension and coating morphology was analyzed, providing a new method for investigating coating surface morphology and related issues. Furthermore, future research could focus on ap