A D V A N C E D M A T E R I A L S & P R O C E S S E S | S E P T E M B E R 2 0 2 2 1 4 SURFACE ENGINEERING ULTRA-HIGH-RATE COATING TECH Using vacuum plasma, a research team from Toyohashi University of Technology, Japan, created an ultrahigh-rate coating technology for functional hard carbon films. Due to their low friction coefficients, they’re used as protective films with sliding surfaces. The new technology achieved a film deposition rate of more than one order of magnitude faster than existing coating technologies while maintaining the same degree of film quality. The technology has potential applications for improving the functional performance of general-purpose products and other mass-produced products. The research team utilized a unique gas injection method in which two kinds of gas were ejected in a jet shape and mixed in a vacuum. Using this process, the team eliminated the need to form a complex discharge electrode in or around the object being coated. According to researchers, the method could be used as a highly versatile process that has applications for a diverse range of materials and shapes. By achieving ultra-high-rate film formation through this gas injection method, the team has removed the need to form a complex discharge electrode in or around the object being coated, so it can be expected to be used as a highly versatile process that can be applied to a diverse range of materials and shapes. The research team plans to expand the size of the high-speed deposition area for practical application of equipment utilizing this technology. They believe that coating of cylindrical inner walls and complex structures will also become possible through further research and development. In the future, they hope to achieve widespread adoption of this new coating technology and contribute to the creation of a society capable of sustainable development. www.tut. ac.jp/english. PROGRESS REPORT ON GLASS COATINGS A new review article published in International Materials Reviews covers current progress on thermal sprayed Fe-based metallic glass coatings (MGCs). These coatings are receiving widespread attention due to their exceptional combination of mechanical and corrosion properties, along with a low material cost for this specific alloy system. These particular MGCs outperform conventional corrosion-resistant materials and coatings in many cases, inspiring a significant increase in research projects over the past few decades. This review article takes a holistic approach, including an in-depth assessment of all relevant work on the topic, such as corrosion properties, degradation mechanisms, and metallurgical and environmental factors with regard to passive film dynamics and formation of corrosion products. Strategies for improving corrosion properties are also included, along with an attempt to identify various knowledge gaps and determine future research directions. https://doi.org/ 10.1080/09506608.2022.2084670. BRIEF Aalberts surface technologies, Germany, is continuing a rebranding initiative for its U.S. businesses. The following companies will now be called Aalberts surface technologies instead of these different names: Aalberts Surface Treatment, Precision Plating Company, Roy Metal Finishing, Ushers Machine and Tool, Accurate Brazing, Ionic Technologies, Applied Process, and Premier Thermal. aalberts-st.com. Side view of coaxial gas injection plasma jet source with a circular nozzle for Ar plasma jet injection with a central C2H2 injection nozzle at its center. Courtesy of Toyohashi University of Technology. Graphical depiction of the use of thermally sprayed Fe-based MGCs for alleviating corrosion-related degradation. Courtesy of the authors.
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