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Human tooth enamel exhibits excellent wear-resistance in mouth. It consists of 92–96% inorganic substances, 1–2% organic materials, and 3–4% water by weight. The contribution of water content to its wear mechanism has not been fully understood yet. In this paper, nano-indentation and scratch tests were performed on human tooth enamel after different drying time to study the effect of water content...
Currently, research on the wear map has been gaining more and more attention from tribologists and has led to the creation of a new research area of wear. In this paper, the wear behaviors (wear mechanisms, surface morphology characteristics and wear rates) of Cr ion implanted pure iron lubricated with liquid paraffin in a large range of sliding speed and load were studied. On this basis, a wear map...
An investigation of the tribochemical behavior of Ni ion implanted pure iron was performed. Ni ion implantation increases the wear resistance of pure iron by 30-120% when liquid paraffin is used as lubricant. The wear resistance of ion implanted pure iron increases with increase in surface residual compressive stress, and decreases with increase in microhardness. When liquid paraffin containing zinc...
The erosion-corrosion behavior of Ti-6A1-4V exposed to air environment up to 800 o C has been studied. Erosion experiments were performed in a sand-blast type of test rig at seven different temperatures. The specimens were heat treated by annealing and solution treating and aging. The target specimens were eroded with 120 grit silicon carbide particles at impact velocities from 55 to 110 m...
The elevated temperature erosion behavior of alumina ceramics has been studied. There were five kinds of aluminas used in this study, with and without the silicate glassy phase and zirconia. The variables studied included temperature variation, material composition and microstructure, and impingement velocity and angle. The erosion mechanisms were also investigated for both the normal and oblique...
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