Polymeric composites of tribotechnical purpose based on fluoropolymers
DOI:
https://doi.org/10.31891/2079-1372-2019-92-2-75-81Keywords:
friction units, teflon, polymeric composites, tribological properties, physico-mechanical propertiesAbstract
The increasing of reliability of friction units in machines and mechanism is actual task. One of the methods it decisions is creation new materials of tribotechnical purpose with high level of wear resistance. The polymer and polymeric composites (PC) based on it are progressive materials for using in friction units. It has many advantages such as high level of wear and chemical resistance, low density, low prime price and oth. In this work had been created PC of tribotechnical purpose based on Teflon and silica. It had been established optimal concentration of silica in polymer matrix (10% mas.) when friction pair PC-steel had been high level of tribological properties. It had been investigated morphological of steel surface before and after wear with PC and had been established that decreasing of friction coefficient and wear is is related with creation of “antifrictional coating” on steel surface. It had been investigated influence of external factors (loading, velocity) on friction and wear of PC (90% teflon + 10% silica). It had been established that this PC can work in normal regime under loading to 2,0 MPa and velocity 1,25 м/s. With help of MathCAD had been receive mathematical formulas that describe friction and wear of PC (90% teflon + 10% silica). It had been investigated physico-mechanical and termophysical properties. It had been established that PC with silica have high level of properties if compare with initial polymer. It had been recommendation by the introduction of investigated materials in friction units of machines and mechanisms
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