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采用铜模吸铸法制备出直径为2 mm的Ce70Al10Cu20和Ce69Al10Cu20Ag1合金棒材,利用Kissinger方程和Vogel-Fulcher-Tammann(VFT)方程对其玻璃转变动力学在不同方面进行了研究。Kissinger方程拟合结果表明,两种Ce基非晶合金铸态及弛豫态都表现出明显的动力学特征,与铸态合金相比,弛豫态合金由于缺陷浓度减少,原子扩散迁移困难,增大了玻璃转变表观激活能。VFT方程拟合结果表明,两种Ce基非晶合金均属于强玻璃形成液体。
Ce70Al10Cu20 and Ce69Al10Cu20Ag1 alloy rods with a diameter of 2 mm were prepared by copper mold suction casting. The kinetics of glass transformation was studied by Kissinger equation and Vogel-Fulcher-Tammann (VFT) equation in different aspects. Kissinger equation fitting results show that the two Ce-based amorphous alloy cast and relaxed state showed obvious dynamic characteristics, compared with the as-cast alloy, the relaxation state of the alloy due to reduced concentration, atom diffusion and migration difficulties, Increasing the glass transitional apparent activation energy. VFT equation fitting results show that the two Ce-based amorphous alloys are strong glass-forming liquid.