Investigation of the Hydroabrasive Wear of Epoxy Composites with Two-Component Filler
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INVESTIGATION OF THE HYDROABRASIVE WEAR OF EPOXY COMPOSITES WITH TWO-COMPONENT FILLER A. V. Buketov,1,2 O. O. Sapronov,1 M. V. Brailo,1 D. O. Zinchenko,1 and V. D. Nihalatii1
UDC 667.64:678.026
We study the influence of the content of a two-component filler ( Al 2O 3 + B) on the wear rate of epoxy composite coatings. We produced coatings with the optimal characteristics of wear that can be used in aqueous abrasive media. It is shown that the materials containing aluminum oxide (60 m.p.) and crystalline boron (40 m.p.) per 100 m.p. of the ED-20epoxy oligomer and 10 m.p. of a polyethylenpolyamine hardener are characterized by the minimum intensity of wear I = 0.36% and the coefficient of wear resistance K wr = 3.66 as compared with the epoxy matrix. Keywords: epoxy composite, wear intensity, coefficient of wear resistance, hardness.
The traditional procedures used for the solutions of the problems of materials science enable us to save significant amounts of the power resources as a result of the development of modified materials with improved operating characteristics. At present, functional protective and wear-resistant coatings on the epoxy basis are extensively used for the purposes of hardening of the surfaces of machine parts and the mechanisms of technological equipment. In this connection, special requirements are imposed on the coatings operating under the conditions of hydroabrasive wear. The improvement of the operating characteristics of composite materials (KM) is attained by introducing in the matrix various plasticizers, modifiers, and fillers of different nature with different ranges of particle sizes.
As a result of detailed investigation of the physicochemical processes running in the process of hydroabrasive wear of composite materials, it was established [1–3] that the main factors determining the mechanism of their fracture are as follows: the mode of operation of the material, the angle between the vector of the velocity of particles and the surface of a workpiece (attack angle), the ratio of the microhardnesses of particles of the hydroabrasive material and the material of the coating, and (directly) the properties and structure of the worn material. It is worth noting that the service life of the friction units of the parts of machines, mechanisms, and aggregates is, in numerous cases, determined by the physicomechanical properties of the surface layers of materials from which these parts are produced. If dust, sand, and other foreign admixtures penetrate into the friction zone, then the hydroabrasive wear of the working surfaces becomes more intense [4, 5]. Therefore, as one of directions of the improvement of the properties of composite materials, we can mention the optimization of their components, including the content of the two-component filler. The aim of the present work is to study the wear resistance of the epoxy composites with two-component fillers.
1 2
Kherson State Marine Academy, Kherson, Ukraine.
Corresponding author; e-mail: [email protected].
Translated from Fizyko-Kh
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