The influence of TiC, CaF2 and MnS additives on friction and lubrication of sintered high speed steels at elevated temperature
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2021, Tribology and Fundamentals of Abrasive Machining Processes: Third EditionAn overview of fluoride-based solid lubricants in sliding contacts
2020, Journal of the European Ceramic SocietyCitation Excerpt :Addition of CaF2 stabilizes the frictional behavior of the composite when sliding tests are carried out at elevated temperature. Therefore, addition of both CaF2 and TiC in high speed steels performs well to achieve satisfactory steady frictional behavior and at the same time desirable wear resistance [50,51]. Cr reinforced Fe matrix possesses good mechanical properties and hence are suitable in many manufacturing industrial applications.
Effects of solid lubricant and laser surface texturing on tribological behaviors of atmospheric plasma sprayed Al<inf>2</inf>O<inf>3</inf>-ZrO<inf>2</inf> composite coatings
2017, Ceramics InternationalCitation Excerpt :To reduce friction, many researchers have implemented various concepts, such as lubricant films, self-lubricating materials, and surface texturing. First, low-friction concepts, such as forming solid lubricant films [8,13] or self-lubricating materials [6,7,10–16], increase the lubricity of the surface by providing easy shear under a sliding condition [6,9]. In addition, surface texturing can also be used to decrease friction by reducing the true contact area, the lubricant retention capability, as well as the wear debris traps [11,17–24].
Effects of solid lubricant and laser surface texturing on frictional performance of pulse electric current sintered Al<inf>2</inf>O<inf>3</inf>-ZrO<inf>2</inf> composites
2016, Ceramics InternationalCitation Excerpt :The worn surface of the PECSed composites was affected by the type of solid lubricants that was in use. Fluoride (such as CaF2 and BaF2) solid lubricants existed with a slip plane at a high temperature, such as the Ca or Ba atomic compact plane, [23]. In the case of non-lamellar structured solid lubricants, such as CaF2 or BaF2, the slip occurs in the densely packed plane of the CaF2 or BaF2 crystal structure.
Wear and friction behavior of self-lubricating alumina-zirconia-fluoride composites fabricated by the PECS technique
2014, Ceramics InternationalCitation Excerpt :Because these lubricants are unable to operate at elevated temperatures [8], solid lubricants are better suited for high-temperature applications. Solid lubricants, such as CaF2, BaF2, BaCr2O4, BaCrO4, MoS2, WS2, h-BN, and graphite, exhibit a lower friction coefficient at high temperatures (773–873 K) than at lower temperatures [9–18]. In general, solid lubricants transition from a brittle state to a plastic state at high temperatures.
Effects of the sliding conditions on the tribological behavior of atmospheric plasma sprayed Al <inf>2</inf>O <inf>3</inf>-15wt.% ZrO <inf>2</inf>-CaF <inf>2</inf> composite coating
2012, Surface and Coatings TechnologyCitation Excerpt :To improve wear and friction of products, novel advanced materials, processing and surface modifying methods will be greatly demanded. In machines, longer lifetimes, increased wear resistance, and reduced energy consumption will be able to lower friction through lubrication [6–15]. The most effective methods to reduce wear and friction in machine are to separate between relative sliding surfaces by means of lubricants such as gases, greases, oils, and solid lubricants.