Abstract
In this study, DLC films were deposited on the cobalt cemented tungsten carbide(WC-Co) substrate adopting the filtered vacuum arc(FVA) technique at different substrate bias voltages and various cobalt content. As a result of Raman analysis, the spectra from all samples in this study have similar shape, with a broad skewed peak centered at approximately 1,550[cmSUP-1/SUP], which is the characteristic of the diamond-like structure. Each spectrum was decomposed into two Gaussian line curves, one at the lower wave numbers between 1,322[cmSUP-1/SUP] and 1,329[cmSUP-1/SUP](D peak) and the other at the higher wave numbers between 1,565[cmSUP-1/SUP] and 1,570[cmSUP-1/SUP](G peak). However, we could not find any change of Raman-shift. According to XPS, as the cobalt content increased, sp3 ratio was decreased. This effect can be inferred that the cobalt binder suppress diamond nucleation and subsequent growth of diamond.
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