• MATERIALS

    THE INFLUENCE OF SULFONE-T FIBER CONTENT ON TECHNICAL CHARACTERISTICS OF ORGANOPLASTICS BASED ON AROMATIC POLYAMIDE

    Machines. Technologies. Materials., Vol. 11 (2017), Issue 8, pg(s) 425-428

    In this paper, the possibility of creating new structural organoplastics based on aromatic polyamide of phenylone, fiberreinforced sulfone-T, is considered. Analysis of the results of physical and mechanical properties showed that, on the one hand, the introduction of an organic fiber into the polymer matrix leads to an increase in hardness, modulus of elasticity, and Poisson’s ratio of 1.7; 1.9 and 1.3 times, respectively, on the other hand, there is an insignificant increase in the relative strain and yield stress at compression in the range of 10%, which is due to the presence of micropores formed at the polymer-fiber interface in the structure of organoplastics with the introduction of fiber filler over 15 wt.%. An increase in wear resistance of 1.6 times was observed, while a reduction in the coefficient of friction by 60%, compared with pure phenylone. Positive results of the research made it possible to switch to industrial ones – replacement of roller bearings of pins on sliding bearings made of polymeric composite material, which led to an increase of 3-4 times the working life as compared to serial ones.

  • CURRENT STATE AND PERSPECTIVES OF INCREASING OF TRIBOTECHNICAL CHARACTERISTICS OF ZINC ALLOYS

    Machines. Technologies. Materials., Vol. 8 (2014), Issue 2, pg(s) 9-10

    Cast zinc alloys are widely used in various industries of national economics, including the manufacturing of products for tribotechnical applications. There are such approaches to solving the problem of improving the tribotechnical characteristics of zinc alloys, as the search for new alloy compositions and optimization of existing ones. However, the capabilities of traditional alloys to achieve the desired properties of products that meet the growing demands almost exhausted at present time. One of the most effective ways to improve the tribotechnical properties of zinc alloys is realization of the principle of reinforced heterophase structure, which is the basis of creation of composite alloys.