Glass-forming ability correlated with the liquid-liquid transition in Pd42.5Ni42.5P15 alloy

Building and Breaking Bonds by Homogenous Nucleation in Glass-Forming Melts Leading to Transitions in Three Liquid States

“…The latent heats are exothermic or endothermic without knowing the explanation. The existence of a first-order transition is claimed for Pd 42 [20,21]. Our nucleation model of melting the liquid mean-range order by breaking residual bonds predicted all values of T n+ and exothermic enthalpies at this temperature.…”

“…The melting temperatures were slowly varying with composition around 880 K and an enthalpy recovery temperature was still observed around 990 K in many liquid alloys. The theoretical predictions for these liquid alloys were limited to the case of Pd42.5Ni42.5P15 [21] presented in Sections 6.1 and 7.1. Structural changes corresponding to these anomalies were still observed with in-situ synchrotron X-ray-scattering experiments in a contactless environment using an electrostatic levitator (ESL).…”

“…The melting temperatures were slowly varying with composition around 880 K and an enthalpy recovery temperature was still observed around 990 K in many liquid alloys. The theoretical predictions for these liquid alloys were limited to the case of Pd 42.5 Ni 42.5 P 15 [21] presented in Sections 6.1 and 7.1.…”

“…[24] for Fe2B. The fast differential scanning calorimetry (FDSC) heating curve at 100 K/s represented in Figure 10 and reproduced from [21] was used to determine the solidus and liquidus temperatures Tsol = 876 and Tliq = 926.5 K. A first-order liquid-liquid transition was observed at TLL = 1063 K. The sample was previously cooled from 1073 K at 40,000 K/s down to room temperature and reheated up to 1073 K, which was a temperature higher than the first-order transition observed at TLL. The homogenous liquid can be quenched along q2 (∆ε lg0 = 0) in Figure 9 from above the temperature where the liquid became homogeneous, down to temperatures much weaker than T g [49][50][51].…”

“…Homogeneous nucleation in the liquid was expected to depend on the time of aging in the range of temperatures below and close to the homogenization temperature. The first-order liquid-liquid transitions in Pd 42 The fast differential scanning calorimetry (FDSC) heating curve at 100 K/s represented in Figure 10 and reproduced from [21] was used to determine the solidus and liquidus temperatures T sol = 876 and T liq = 926.5 K. A first-order liquid-liquid transition was observed at T LL = 1063 K. The sample was previously cooled from 1073 K at 40,000 K/s down to room temperature and reheated up to 1073 K, which was a temperature higher than the first-order transition observed at T LL .…”