TY - JOUR
T1 - A new approach for determining the critical cooling rates of nucleation in glass-forming liquids
AU - Liu, Shujiang
AU - Tao, Haizheng
AU - Zhang, Yafei
AU - Yue, Yuanzheng
PY - 2017
Y1 - 2017
N2 - Crystallization of a liquid below liquidus temperature is a complex process due to simultaneous nucleation and growth of crystals. Nucleation is the crucial initial step of the crystallization process, and affects the glass-forming ability, especially when there is a large overlap between nucleation and crystal growth versus temperature curves. From the temperature-time-transformation (TTT) diagram, one can estimate the critical cooling rate, qc*, of glass-formation, however this is time-consuming. In this paper, we establish a simple approach to determine the qc* using calorimetric and viscometric data. Based on the classical nucleation theory, the correlation between the crystallization onset temperature and cooling rate is described by combining two temperature-dependent functions. The new approach is applicable to a wide range of glass-forming systems. This work also gives insight into heterogeneous nucleation and glass formation kinetics.
AB - Crystallization of a liquid below liquidus temperature is a complex process due to simultaneous nucleation and growth of crystals. Nucleation is the crucial initial step of the crystallization process, and affects the glass-forming ability, especially when there is a large overlap between nucleation and crystal growth versus temperature curves. From the temperature-time-transformation (TTT) diagram, one can estimate the critical cooling rate, qc*, of glass-formation, however this is time-consuming. In this paper, we establish a simple approach to determine the qc* using calorimetric and viscometric data. Based on the classical nucleation theory, the correlation between the crystallization onset temperature and cooling rate is described by combining two temperature-dependent functions. The new approach is applicable to a wide range of glass-forming systems. This work also gives insight into heterogeneous nucleation and glass formation kinetics.
KW - Critical cooling rate
KW - Glass-forming liquid
KW - Nucleation
UR - http://www.scopus.com/inward/record.url?scp=85019084100&partnerID=8YFLogxK
U2 - 10.1111/jace.14926
DO - 10.1111/jace.14926
M3 - Journal article
AN - SCOPUS:85019084100
SN - 0002-7820
VL - 100
SP - 3875
EP - 3882
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 9
ER -