Free volume change in crystallization process of Zr–Cu–Al metallic glass studied by positron annihilation techniques

Free volume in Zr-based bulk glassy alloys studied by positron annihilation techniques

“…As shown in this figure, the difference of positron lifetime comparing with as-prepared sample increases with increasing annealing temperature. This result agrees with our previous results [4,9,10]. As can be seen from this figure, density increases, and absolute value of positron lifetime decreases with increasing annealing temperature.…”

Effect of thermal annealing on the local structure in ZrCuAl bulk metallic glass

“…The crystallized specimen shows a reduction in positron lifetime from 164 to 158 ps. This trend of decreasing of positron lifetime by the crystallization is in agreement with the result of Hori et al [21] and that for Zr 52.5 Ti 5 Al 10 Cu 17.9 Ni 14.6 alloy system by Asoka-Kumar et al [22]. Fig.…”

Relaxation of Free Volume in Zr<SUB>50</SUB>Cu<SUB>40</SUB>Al<SUB>10</SUB> Bulk Metallic Glasses Studied by Positron Annihilation Measurements

“…This technique is possible to detect the free volume in the bulk metallic glass. 7 9,10) In this paper, therefore, we describe the results of free volume relaxation process in the same bulk metallic glass at each annealing temperature below T g by positron annihilation techniques.…”