Gage Capability Study of Thin Film Coating Roughness Measurement Method Using Profilometer

Faizal , Zainol (2007) Gage Capability Study of Thin Film Coating Roughness Measurement Method Using Profilometer. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Gage capability study is the procedure to determine error of measuring system represented by repeatability, reproducibility and precision to tolerance ratio (P/T). In thin film coating, wear and friction are strongly affected by surface roughness. Optimum roughness provides minimum wear and friction. Surface roughness measurement on thin film was also reported to be one of methods to detect harmful macro particle on coating surface. The objectives of this study were to ascertain the suitability of profilometer as roughness measurement method of thin film coating and detection method of macro particle through gage capability study and to identify and minimize the variability of measuring tool. Using profilometer, roughness measurement of TiN coating on carbide tool was conducted. From the data, repeatability & reproducibility and P/T ratio was calculated. The result indicated that profilometer is an acceptable measuring method for normal thin film coating roughness but not acceptable measuring method to detect macro particle.

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