Abstract
Tribomechanical properties of antifriction composites based on the extrudable matrix “UHMWPE + 17 wt. % HDPE-g-VTMS + 12 wt. % PP” with chopped fiberglass formed by three methods: Hot Pressing of Powders (HPP), Hot Pressing of Granules (HPG) and Fused Deposition Modeling (FDM) was studied. It has been found that a composite fabricated by the FDM method possesses the highest strength properties (elastic modulus, yield strength and tensile strength). It is shown that tribological properties (friction coefficient, volumetric wear) of composites fabricated by the three methods are close to each other that is related to impact of the reinforcing filler (fiberglass). The latter takes on compressive and shearing loads during tribo-loading and improves wear resistance of the composite. The studied multicomponent UHMWPE based composite is recommended for use as a feedstock for the manufacturing antifriction products by additive manufacturing.
Highlights
Applied studies on the use of 3D printing methods, namely FDM (Fused Deposition Modeling) for manufacturing products with polyolefin matrices using various fillers and plasticizers [1-6] are carried out.Besides the market available additives traditionally used in industry, some commercially available polymers compatible with ultra-high molecular weight polyethylene (UHMWPE) can be used as plasticizing fillers
It is seen that mechanical properties of the composite fabricated by 3D-printing exceeds those of the composite prepared by powder hot pressing (HPP) by 10 %
Tribomechanical properties of antifriction composites based on the extrudable matrixUHMWPE + 17 wt. % HDPE-g-VTMS + 12 wt. % PPloaded with milled fiberglass formed in three ways: hot pressing of powders (HPP), hot pressing of granules (HPG) and layer-by-layer extrusion printing of granules (FDM) have been investigated
Summary
Applied studies on the use of 3D printing methods, namely FDM (Fused Deposition Modeling) for manufacturing products with polyolefin matrices (including UHMWPE) using various fillers and plasticizers [1-6] are carried out.Besides the market available additives traditionally used in industry, some commercially available polymers compatible with UHMWPE can be used as plasticizing fillers. This makes it possible to produce extrudable polymer-polymeric composites with UHMWPE matrix with specified strength and wear resistance characteristics for manufacturing products by 3D printing technologies. On the basis of the specified i) composition structure, ii) tribological and iii) mechanical properties of polymer-polymeric UHMWPE composites experimental specimens were fabricated by the FDM (extrusion layer printing) and studied.
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