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Diamond-like carbon coatings produced by Plasma Source Ion Implantation (PSII) and beamline Ion Beam Assisted Deposition (IBAD) were synthesized and studied. Gas pressure and electrical current were used as variables to design four independent PSII test sets. Beamline IBAD samples were produced with a pre-optimized set of parameters. Profilometry measurements showed the films to have thicknesses between 1.44 +/- 09 and 1.64 +/- 04 microns and to possess very low roughness averages, ranging from 14 +/- 3 to 28 +/- 3 nm, which correlate with substrate surface roughness. Atomic Force Microscopy revealed that diamond-like carbon crystal sizes varied significantly with chamber pressure. Crystals were generally spherical in shape suggesting that films were highly amorphous. Microhardness and nanohardness test results showed the hardest films to be greater than 3 times the hardness of untreated steel. The elastic modulus of the films, measured during the nanohardness test, was directly related to film hardness. Fretting wear and Pin-on-Disk tests were performed to quantitatively assess the ability of films to resist wear. Fretting wear tests showed a dramatic decrease in friction for diamond-like carbon films with friction levels ranging from 10% to 30% of that of untreated steel. Pin-on-Disk tests revealed a significant improvement in wear resistance prior to stylus penetration into the substrate.
Surface & Coatings Technology, Volumes 59–60 presents the proceedings of the Third International Conference on Plasma Surface Engineering, held in Garmisch-Partenkirchen, Germany, on October 26–29, 1992. This book discusses the widespread applications of plasma and particle beam assisted methods in surface and thin film technology. Volume 59 is organized into 11 parts encompassing 69 chapters while Volume 60 is comprised of eight parts encompassing 49 chapters. This compilation of papers begins with an overview of the kinetic modelling of low pressure high frequency discharges. This text then examines the effect of various deposition parameters on the growth of chamber wall deposits. Other chapters consider the physiochemical behavior of ceramic materials for space applications. This book discusses as well the economic aspects of the application of plasma surface technologies. The reader is also introduced to the environmental aspects of physical vapor deposition coating technology. This book is a valuable resource for plasma surface engineers, technologists, and researchers.
This book highlights some of the most important structural, chemical, mechanical and tribological characteristics of DLC films. It is particularly dedicated to the fundamental tribological issues that impact the performance and durability of these coatings. The book provides reliable and up-to-date information on available industrial DLC coatings and includes clear definitions and descriptions of various DLC films and their properties.