I want to coat over a small area with the diameter of the circular area being just 3 mm. The coating material is epoxy nanocomposite with a inorganic filler and the material has to be coated over the Pin of pin on disc tribometer.
Hello Murali. You could coat with a diamond carbon PECVD (Plasma Enhanced Chemichal Vapor Deposition) coating or another of your choice. You would have to leave exposed only the region that will receive the coating.
Joseph@, good morning. I developed an equipment to do PECVD and we are starting some research, follow some results
Study production of diamond-like carbon films on the Ti6Al4V alloy surface by using rf-PECVD method
Thin films have been gaining space in the surface engineering area due to their excellent relationship with the mechanical properties of materials without changing the physicochemical properties. Diamond-like carbon (DLC) films stand out because they have very similar characteristics of diamonds. Through the plasma-enhanced chemical vapor deposition (PECVD) method and hydrocarbon gases it is possible to obtain hydrogenated amorphous film (a-C:H) with good adhesion, high hardness and low coefficient of friction. The aim of this study was to analyze the some parameters effects, such as power, treatment time, gas radio, the presence or absence of the interface to obtain a DLC film on the surface of Ti6Al4V alloy by using rf-PECVD method. To obtain the thin film, we used the potency range (15 to 150 W) with treatment time of 10 to 60 min. The precursor gas used was C2H2 diluted in argon with a working pressure of 9.33 Pa, in the proportion of 10 to 30%. To form the interface, a mixture of Hexamethyldisiloxane (HMDSO) in 30%Ar was applied. It was observed that low potencies of treatment were responsible for the production of a yellow film coloration and hardness of 0.8 GPa. However, treatments performed at 150 W caused degradation of the produced film. The characteristic of DLC film was obtained using a power of 100 W during 1 h of treatment. The proportion of the precursor gases used was 70% Ar + 30% C2H2 and an interface of 70% HMDSO + 30% Ar. In this condition, a black color film with a thickness of 280 nm, a coefficient of friction of 0.02 and a hardness of 25 GPa. The substrate hardness is 11 GPa.
@Marcos. The problem that I face is that my material is polymer nanocomposite and I don't have either dip or spin coating equipment. All I have is Wet Film Applicator. How can I use film Applicator to coat such a small pin ?
@Murali. Contact us by e-mail [email protected] To be able to help you. I have the reactor and I can try to perform the experiments in their nanocomposites.
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