FRICTION AND WEAR PROPERTIES OF Ni-FREE Zr-BASED BULK METALLIC GLASSES IN SIMULATED BODY FLUID

摘要: In the last decade,bulk metallic glasses(BMGs) emerge as a new class of materials with disordered atomic structure.Especially,Zr-based BMGs have attracted an increasing attention due to their distinct properties including ultrahigh strength,high elastic strain limit,relatively low Young's modulus(50—100 GPa) and easy forming ability in viscous state.In addition,Zr-based displayed superior corrosion resistance artificial body fluids satisfactory biocompatibility. The combination these unique makes them extremely promising for biomedical applications.The most applications are dentistry orthopaedics mechanical superiority,where friction wear clinically important performance implants body.In present study,a Ni-free BMG plate Zr_(60)Cu_(19)Fe_5Al_(10)Ti_6 dimensions 70 mm×12 mm×1.5 mm was successfully prepared by water-cooled copper mold casting.The characteristics under sliding dry air,distilled water phosphate buffered saline(PBS) been investigated on SRV tester ball-on-plate contact configuration where upper ball motion made zirconia 10 diameter lower stationary BMG.Ti6Al4V alloy also tested same condition comparison.The depth surface profiler volume calculated.The morphologies component debris were examined SEM EDS.Compared Ti alloy,the exhibits much less loss PBS solution,demonstrating that has better than alloy,though former larger coefficient.The mechanism is dominated oxidation fatigue flake mechanism.