Abstract
A series of composites of UHMWPE filled with various amounts of Titanium (Ti) particles in micron and nano-sizes was developed to explore the possibility of enhancing wear performance. Mechanical properties such as tensile strength, impact strength, Young’s modulus and % elongation showed significant improvement with an increase in Ti particles up to certain amount followed by a decline. Tribological properties were evaluated in a single-pass abrasive wear mode using a pin on disc configuration. The wear resistance of UHMWPE showed significant improvement up to a certain amount of particles. The coefficient of friction also reduced drastically. Vickers and Scratch hardness tests were carried out using diamond indenter. X-ray tomography was done to analyze the dispersion of particles in the matrix. Wettability studies and worn surface analysis were done on the composite- surfaces. Incorporation of Ti particles improved the strength of the composites significantly. The composites showed low wear rates (≈10−10 m3 Nm−1) and were correlated with scratch hardness. Various wear mechanisms like micro-cutting, micro-ploughing and groove-formation were also observed in Scanning electron micrographs (SEM). Nano-particles outperformed micro-particles in almost all properties.
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