Abstract
Ti/TiAlN coatings were deposited on tungsten carbide substrates and consist of the target Ti0.5Al0.5 using sputtering system is one of the main techniques which done be coating substrate. This research aimed is to develop the model a PVD magnetron sputtering process that can predict the relationship between process input parameters and the resulting coating properties and performance. RSM Response Surface Methodology was used, one of the most cost-effective and practical techniques to develop the process model. The influence of substrate thickness on the structural properties of the coatings was investigated and the effect of bias voltage on the microstructure was investigated. The number of crystallite grain size reduced with the increase of the bias voltage then reduce minimum roughness 0.07157 (µm) and became maximum roughness 0.7856 (µm). The crystalline grain size of the coatings increased as the bias voltage was raised from 50 to 75 V, and then decreased with further increase of the bias voltage.
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