TY - JOUR
T1 - Consecutive nucleation events during divetrification of Zr 52.5Cu17.9Ni14.6Al10Ti5 bulk metallic glass
AU - Yang, Ling
AU - Wang, Xun Li
AU - Porter, Wallace D.
AU - Lu, Zhaoping
AU - Stoica, Alexandru D.
AU - Payzant, E. Andrew
AU - Almer, Jonathan
AU - Shi, Donglu
PY - 2008/11
Y1 - 2008/11
N2 - DSC, XRD, and in-situ synchrotron diffraction experiments were carried out to investigate the devitrification behavior of Zr52.5Cu 17.9Ni14.6Al10Ti5 bulk metallic glass. Through careful measurements of isochronal and isothermal DSC traces, we identified two consecutive exothermal peaks. XRD patterns collected at various stages of isothermal annealing and in-situ synchrotron data collected during isochronal heating indicate that the exothermal peaks correspond to two nucleation events, with different local atomic structures. Multi-parameter refinement of both isochronal and isothermal DSC data show that the devitrification behavior of this alloy is adequately described by JMA theory with a two-step consecutive reaction model, so long as the heating rate is < 10 K/min.
AB - DSC, XRD, and in-situ synchrotron diffraction experiments were carried out to investigate the devitrification behavior of Zr52.5Cu 17.9Ni14.6Al10Ti5 bulk metallic glass. Through careful measurements of isochronal and isothermal DSC traces, we identified two consecutive exothermal peaks. XRD patterns collected at various stages of isothermal annealing and in-situ synchrotron data collected during isochronal heating indicate that the exothermal peaks correspond to two nucleation events, with different local atomic structures. Multi-parameter refinement of both isochronal and isothermal DSC data show that the devitrification behavior of this alloy is adequately described by JMA theory with a two-step consecutive reaction model, so long as the heating rate is < 10 K/min.
UR - http://www.scopus.com/inward/record.url?scp=57349127073&partnerID=8YFLogxK
U2 - 10.1002/adem.200800129
DO - 10.1002/adem.200800129
M3 - Article
AN - SCOPUS:57349127073
SN - 1438-1656
VL - 10
SP - 1043
EP - 1047
JO - Advanced Engineering Materials
JF - Advanced Engineering Materials
IS - 11
ER -