Rusanova A I, Rusanov B A, Beltyukov A L, Sidorov V E, Son L D
Institute of Metallurgy UB RAS, Ekaterinburg, Russia.
Ural State Pedagogical University, Ekaterinburg, Russia.
J Phys Condens Matter. 2024 Jul 25;36(42). doi: 10.1088/1361-648X/ad649e.
Obtaining amorphous alloys with good mechanical and anticorrosion properties is an important problem of modern condensed matter physics. Since the preparation of amorphous alloys involves casting them from liquid state, information on the properties of the melts is needed. Viscosity is one of the most informative structure-sensitive property of melts. In this paper viscosity of some glass-forming Al-Ni-Co-Nd(Sm) melts with different ratio of transition metals was studied using damped oscillation method in a wide temperature range up to 1550 K. Activation energies of the viscous flow were calculated from the experimental data. The hysteresis of viscosity temperature dependences during heating and subsequent cooling was found. It can be associated with a melt transition to a more homogeneous state. The repeated heating and cooling of the melts without crystallization lead to Arrhenius type of viscosity temperature dependences.
获得具有良好机械性能和抗腐蚀性能的非晶合金是现代凝聚态物理的一个重要问题。由于非晶合金的制备涉及从液态铸造，因此需要有关熔体性质的信息。粘度是熔体中最具信息量的结构敏感性质之一。本文采用阻尼振荡法在高达1550K的宽温度范围内研究了不同过渡金属比例的一些玻璃形成Al-Ni-Co-Nd（Sm）熔体的粘度。根据实验数据计算了粘性流动的活化能。发现了加热和随后冷却过程中粘度温度依赖性的滞后现象。这可能与熔体转变为更均匀的状态有关。熔体在不结晶的情况下反复加热和冷却会导致粘度温度依赖性呈现阿仑尼乌斯类型。
