Czasopismo | INŻYNIERIA MATERIAŁOWA | Rocznik 2010 - zeszyt 3

Manufacturing powder bearings modified with solid lubricant nanoparticles for high temperature applications

nr katalogowy: 52727

With the rapid development of industries and advanced technologies, more and more mechanical devices are required to work in high temperature, for example, the various devices used in aviation and electrical industries, the engine sliding components, and the mechanical devices in the nuclear industry. The conventional grease lubricating systems used in the high temperature do not meet the present requirements, so it is urgent to develop materials with excellent self-lubricating property from the room temperature to about 1000°C. Sliney and co-workers prepared several high temperature self-lubricating sintered materials [1÷4], three typical materials among which are PS101 (30% Ni-Cr, 30% Ag, 25% CaF, 15% glass), PS200 (80% Ni-Co-Cr3C2, 10% Ag, 10% BaF2/CaF2), and PS300(80% Ni-Cr-Cr2O3, 10% Ag, 10% BaF2/CaF2). These materials show good self-lubricating properties (friction coefficient about 0.1÷0.3) in a wide temperature range. New advanced materials are generally considered as essential for the development of novel solid lubricants giving access to high temperature applications [5]. The nanoparticle solid lubricant materials have been identified as being of potentially outmost importance for many industrial high temperature applications, as a consequence of their original two-dimensional lamellar structure and superior friction properties. These materials have been identified as strong candidates for high temperature tribology applications because of their atomic-scale structure involving strong covalent bonds and non-compact space filling. Detailed analysis of nanoparticles mechanical behaviour during sliding is essential to gain understanding of the complex physical nature of these nanostructures during friction process. The shape, strength, fracture and interparticle friction properties of such nanostructures are of great importance. The nanoparticle ensemble behavior is believed to be identified by continuum mechanics metho[...]

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e-Publikacja (format pdf) - nr 52727 "Manufacturing powder bear..." licencja: Osobista Produkt cyfrowy	10.00 zł

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2010-3

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