Abstract
In this report we demonstrate the use of optical and acoustic microscopy to nondestructively examine chemically vapour deposited (CVD) diamond coatings with simulated machining damage. During machining, a coated tool insert is subjected to both normal and shearing stresses in the process zone. Machining tests conducted early in this investigation revealed that these stresses resulted in spalling of the CVD diamond coating on the tool flank and rake face resulting in substantially increased wear. Further, it was discovered that the adhesive strength of the coating was extremely sensitive to many of the coating parameters such as roughness of the substrate, coating thickness, percent methane, coating temperature and pressure, etc. A decision was therefore made to utilize a simpler test to evaluate the adhesive strength of a particular coating and thus demonstrate a nondestructive evaluation method in order to optimize the parameters of the coating test matrix prior to conducting machining tests.
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References
A. J. Perry, “Scratch Adhesion Testing of Hard Coatings,” Thin Solid Films. 107, pp. 167–180 (1983).
A. J. Perry, “Scratch Adhesion Testing: A Critique,” Surface Engineering. 2, pp. 183–185 (1986).
P. A. Steinmann, Y. Tardy and H. E. Hinterman, “Adhesion Testing by the Scratch Test Method: The Influence of Intrinsic and Extrinsic Parameters on the Critical Load,” Thin Solid Films. 154, pp. 333–349 (1987).
D. B. Marshall and A. G. Evans, “Measurement of Adherence of Residually Stressed Thin Films by Indentation: 1. Mechanics of Interface Delamination,” J. Appl. Phys. 56, pp. 2632–2638 (1984).
Prem C. Jindal, Dennis T. Quinto and George J. Wolfe, “Adhesion Measurements of Chemically Vapor Deposited and Physically Vapor Deposited Hard Coatings on WC-Co Substrates,” Thin Solid Films. 154, pp. 361–375 (1987).
J. L. Vossen, “Measurements of Film-Substrate Bond Strength by Laser Spallation,” ASTM STP 640, pp. 122–133 (1978).
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© 1991 Springer Science+Business Media New York
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Conway, J.C. et al. (1991). Nondestructive Evaluation of Adhesive Strength of CVD Polycrystalline Diamond Coatings Deposited on Sialon Substrates. In: Ruud, C.O., Bussière, J.F., Green, R.E. (eds) Nondestructive Characterization of Materials IV. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-0670-0_7
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DOI: https://doi.org/10.1007/978-1-4899-0670-0_7
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