Effects of isochronal annealing on the positron annihilation of glassy Bi<sub>1.6</sub> Pb<sub>0.4</sub> Sr<sub>1.9</sub>Ca<sub>2</sub>Cu<sub>3.1</sub>O<sub>y</
Carbon ions with a dose of 3×10<sup>17</sup> ions/cm<sup>2</sup> was implanted into Ti-6Al-4V alloy at anenergy of 80 keV.A 28% increase in edurance limit