| PAN Xiao-long,HU Xiao-gang,ZHAO Jing,QIU Long-shi.NPResearch Progress on Evaluation Methods of Interfacial Bonding Strength of Film/Coating[J],51(4):50-65 |
| NPResearch Progress on Evaluation Methods of Interfacial Bonding Strength of Film/Coating |
| Received:August 08, 2021 Revised:November 09, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2022.04.005 |
| KeyWord:film coating interface bonding strength evaluation methods |
| Author | Institution |
| PAN Xiao-long |
Xi'an Rare Metal Materials Institute Co., Ltd., Xi'an , China |
| HU Xiao-gang |
Xi'an Rare Metal Materials Institute Co., Ltd., Xi'an , China |
| ZHAO Jing |
Xi'an Rare Metal Materials Institute Co., Ltd., Xi'an , China |
| QIU Long-shi |
Xi'an Rare Metal Materials Institute Co., Ltd., Xi'an , China |
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| Abstract: |
| The bonding strength between the film/coating and the substrate as one of the key indexes to evaluate the quality of the film/coating is the basic premise to ensure that the film/coating meets the requirements of mechanical, electrical, optical and magnetic properties. The characterization of interfacial bonding properties of film/coating materials is one of the most important parts of surface science and engineering, as well as the basis for the study and prevention of interface failure. With the constant emergence of new materials, new equipment, new technologies and new process, the interfacial microstructure becomes more complex, the result becomes more unpredictable, and higher requirements are put forward for the evaluation of interface bonding strength. At present, various methods have been developed to evaluate the interfacial bonding strength of film/coating and substrate, the test principle and application scope are quite different. More importantly, there is no single method that is suitable for all material systems. It is of great significance to accurately evaluate the film/coating bonding strength for the control and improvement of the interface properties, and the prediction of the service behavior and life of the film/coating. The physical significance of interfacial bonding strength was introduced, the difference between “intrinsic binding strength” and “actual binding strength” was clarified, and the characterization model of interfacial bonding strength was described from the perspective of fracture mechanics. According to the loadings, the current commonly used evaluation methods were divided into static loading methods (including tensile test, peeling test, scratch test, pressing test, bubbling test, bending test, etc.) and dynamic loading methods (reciprocating scratch test, impact test, cyclic indentation test, contact fatigue test, etc.). The basic principles, technical characteristics, and mechanical models of evaluation methods were systematically reviewed. The advantages, disadvantages and applicable fields of different evaluation methods were induced. Furthermore, the applicable coating material system and coating thickness range were summarized. The research status of evaluation methods for interfacial bonding strength of film/coating materials was reviewed. Among the static evaluation methods, scratch test and surface indentation test were still the most commonly used methods due to the advantages of simple test, less time consuming, no special treatment for samples, and available professional commercial equipment. Compared with the static evaluation methods, the interfacial bonding strength characterized by dynamic evaluation methods was more close to the service conditions, and provided more accurate prediction for the failure of film/coating materials. Among the dynamic evaluation methods, rolling contact fatigue test and cyclic indentation test had the advantages of sensitivity to interface factors, quantification and dynamic monitoring, showing a good application prospect in the evaluation of interfacial bonding strength. Finally, the development directions of interfacial bond strength evaluation methods were prospected. In the future, more efficient and accurate evaluation methods will be developed, unified evaluation criteria and characterization parameters will be constructed, and a complete interface safety and failure evaluation system will be established. The work provides reference for the reasonable and accurate evaluation of the interface bonding strength, and expands the breadth and depth of application of film/coating materials in new fields and directions. |
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