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At Argonne National Laboratory, we recently developed low-friction amorphous carbon coatings with exceptional tribological properties. The present study evaluates the scuffing performance of three variations of the carbon coating deposited on H-13 steel surfaces and lubricated with base-stock and fully formulated synthetic Poly-alfa-olefin (PAO) lubricants. ...The present study evaluates the scuffing performance of three variations of the carbon coating deposited on H-13 steel surfaces and lubricated with base-stock and fully formulated synthetic Poly-alfa-olefin (PAO) lubricants. ...Using a ball-on-flat contact configuration in reciprocating sliding, we found that although the coatings reduced friction slightly, they increased scuffing resistance significantly when one of the sliding surfaces was coated when compared to uncoated steel-on-steel contact.

As a result, interest in cylinder surface coatings has increased considerably in the last few years, also in the SUMEBore® coating solution from Sulzer Metco. ...SUMEBore coatings are applied by a powder-based air plasma spraying (APS) process. Such an APS process is very flexible and can also process materials to which wire-based methods do not have any access, particularly metal matrix composites and pure ceramics. ...This APS coating solution has already been commercialized in various markets; it has proven to be suitable for mass production on both new engine blocks and liners, and for repair of worn-out parts.

Furthermore, to prevent this piston pin scuffing when there is no force reversal, the authors applied a type of diamond-like carbon (DLC), a hydrogenated tetrahedral amorphous carbon (ta-C:H) coating, to the piston pins and then evaluated its anti-scuffing characteristics in a multi-cylinder engine.

Further developments of those aftertreatment systems, concerning substrates, coatings and reduction agent control, open further potentials of improvements.

The present work has the objective to quantify and evaluate abrasive wear resistance of a hard coating. It is obtained by weld deposition of an iron based alloy containing Cr and Nb as carbide forming elements, and to compare it to wear resistance of a heat treated SAE 5160 steel, normally used for agricultural equipment.

An advanced variable valve actuation system is developed that requires a coating with high stress loading capability on the sliding interfaces to enable compact packaging solutions for gasoline passenger car applications. ...This paper addresses the technology developed to utilize a Diamond-like carbon (DLC) coating on the slider pads of the SRFF. Slider interfaces that are able to withstand high stress levels enable compact packaging options for valvetrain solutions. ...The slider pad surface finish and form is shown to be essential prior to applying the DLC coating. Process development for high volume production is developed to meet the surface preparation requirements.

This paper introduces a coating that has both excellent temperature stability and good compliance, thus forming an excellent sealing enhancement for metallic layers in exhaust system gaskets.

The polymeric coating developed by MAHLE was applied over a sputtered layer and has demonstrated to be a suitable solution to attend to the application demands. ...The seizure and wear resistance were strongly reinforced with the use of a polymeric coating when compared to a typical Al-Sn sputtered layer. The functional polymeric layer remains in place after long durability tests in a demanding HDD engine.

The results indicate a more efficiency of organometallic coating when compared with tin coating, in all media. When the biofuel solutions are compared, it is observed that the soybean biodiesel is more corrosive than diesel.

Using this benefit to reduce side forces by a longer connecting rod, the full friction reduction potential is achieved by a combination with a new low friction carbon based coating on the piston pin. The new coating shows best-in-class performance in terms of friction and high temperature resistance compared to currently available pin coatings. ...A piston compression height reduction in combination with carbon based piston pin coatings is enabling advancements in both demands. MAHLE implemented a new innovative metal joining technology by using laser welding to generate a cooling gallery. ...The new coating shows best-in-class performance in terms of friction and high temperature resistance compared to currently available pin coatings. The shorter compression height also results in reduced oscillating masses. This can be used for further weight reduction in the whole drivetrain, which allows the implementation of further systems for better fuel efficiency, e.g. waste heat recovery, without reducing payload.

In this context, the robustness of the piston ring running face, as characterized by wear resistance and scuff resistance in particular, plays an increasing role. As coatings are a crucial surface design element, they inevitably are a primary focus for addressing friction loss and increasing robustness in the piston ring/cylinder tribological system. ...This paper will outline the development of a new generation tetrahedral amorphous carbon (ta-C) piston ring coating called DuroGlide®, which is setting new standards in high-performance, low-friction piston ring technology. ...DuroGlide-coated piston rings demonstrate outstanding durability, friction, and scuff resistance compared to any ring coatings and contribute, in combination with advanced top and oil ring designs, fuel economy savings up to 1.2 percent for commercial vehicle engines.

Coatings have the potential to improve bearing tribological performance. However, every coating application process and material combination may create different residual stresses and coating microstructures, and their effect on bearing fatigue and wear performance is unclear. ...The MSCM models show an increase coating crack gap distances due to tensile coating residual stresses. A detailed discussion of these results and the overall value of the developed model's methods and considerations are presented in this work. ...However, every coating application process and material combination may create different residual stresses and coating microstructures, and their effect on bearing fatigue and wear performance is unclear. The aim of this work is to investigate coating induced residual stress effects on bearing failure indicators using a microstructural contact mechanics (MSCM) finite element (FE) model.

Abstract The proven impact of combustion chamber deposits, CCD, on advanced compression ignition, ACI, combustion strategies has spurred researchers to develop thermal barrier coatings, TBC, which can mimic CCD benefits on combustion efficiency and operational range expansion.

The Bluestop coating process from Nelson offers protection for chrome-plated exhaust components against chrome discoloration.

Ultra-short pulsed laser deposition surface coating technology from Picodeon enables creation of porous or dense aluminum oxide (Al2O3) coatings on heat-sensitive substrates.

mycon developed a new coating system that is suitable for coating and painting longer parts, e.g., wires, belts, tubes, rods, and profiles.

Sixteen AIC Metal Direct factory package colors have been added to ACME Quality Paints’ AIC product line for industrial, machinery, and equipment applications.

A new piston and pin concept and a high-temperature-resistant, low-friction coating result in reduced friction and lower fuel consumption for commercial vehicle engines.

Four of these technologies – smart coatings for corrosion detection and protection, aluminum alloys for high temperature applications, particle contamination mitigation technologies, and thermal and environmental barrier coating systems – are among NASA’s most in-demand technologies and have been applied to mainstream engineering projects. ...Four of these technologies – smart coatings for corrosion detection and protection, aluminum alloys for high temperature applications, particle contamination mitigation technologies, and thermal and environmental barrier coating systems – are among NASA’s most in-demand technologies and have been applied to mainstream engineering projects.

High-rate-reactively-sputtered (HRRS) hard coatings have been deposited on steel rollers. The effects of substrate hardness and coating hardness on the tribological behavior of titanium nitride (TiN) coated steel rollers have been investigated with a roller-on-roller tribo-tester. ...For a relatively soft substrate (Rc 45), the benefit of using the relatively soft TiN coating rather than the hard TiN coating has been demonstrated....The properties of both the substrate and the coating were found to be very important in determining the wear performance of the rollers. From experimental results it was noted that the relatively hard TiN coatings enhanced the scuffing-failure-load by ten times when deposited onto relatively hard substrates (Rc 62), but did not improve the performance of soft substrates (Rc 45).