Bore anti-erosion coatings are capable of increasing the service life and reliability of gun barrels, highlighting the critical requirement for improvement and evaluation of the interfacial bonding performance. In this study, a quantitative method is proposed to characterize the interfacial bonding performance of the chromium/gun steel, and thereafter used to analyze the effects of magnetron sputtering parameters on the interfacial bonding. The linear spring model is introduced to revise the lateral substrate tensile method, and the formulae of interfacial shear stiffness and lower limit of interfacial shear strength are derived to characterize the interfacial bonding performance. Then, a quantitative measurement system is established, in which the substrate strain and the crack density of coating are recorded. Finally, the effects of magnetron sputtering process parameters, including substrate roughness, temperature, bias voltage, and gas pressure, on the bonding performance of the chromium/gun steel interface are compared quantitatively. A set of process parameters beneficial for improving the interfacial performance is given, and the quantitative method for evaluating the chromium/gun steel interface is justified.
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Fu et al. (2026) studied this question.
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