A study has been made of mechanical and electrochemical properties of carbon films on pure iron sheets formed by ion beam enhanced deposition (IBED). The IBED carbon film was formed by implantation of 100 keV-12C+ ions up to a dose of 1018 ions/cm2 in a fluorocarbon atomosphere. The results showed an increase in surface hardness, and distinct reductions in friction coefficient, wear volume and anodic dissolution of iron. The mechanical and electrochemical properties are discussed with respect to the composition and structure analyzed by XPS, XRD and laser Raman spectroscopy. In conclusion, IBED with C+ beam in fluorocarbon atomosphere is a useful technique for formation of the solid lubricating carbon film with high durability.
In SIMS analysis of insulator surface, charge up on sample is one of the most serious problems. Recently, to solve the problem, a new method, combined with electron bombardment induced conductivity and the formation of an electrical conductive path, has been developed. This method has, however, some unkown factors, e. g. charge reduction mechanism. The purpose of this study is to make clear the charge reduction mechanism by comparing the new technique with the conventional electron-beam flooding method by using a quartz specimen. Basically, the charge reduction mechanism of the new technique is almost the same as that of the electron-beam flooding method which uses secondary electrons produced by electron-beam flooding. Formation of an electrical conductive path contributes to the adjustment of the excess or deficient suface electrons. By using the new method, it is possible to analyze insulators with a smaller prove size when compared with the analysis by the conventional electron-beam flooding method.