铝基非晶合金的非晶形成能力差已成为其应用的主要障碍，利用Ca、Sr、Ba微合金化有可能成为提高其非晶形成能力的重要途径。由于Al基非晶合金的特点，许多预测其它非晶合金的非晶形成能力的经验方法并不适用于Al基非晶合金，Al基非晶合金的非晶形成能力需要结合结晶热力学与动力学进行预测，准确的相图热力学数据库是这一预测方法的基础。本项目拟综合运用平衡合金法、扩散多元结和相图热力学计算方法，系统研究Al-(Ni,Co)-(Y,Gd)-（Ca,Sr,Ba）多元相图，建立相应的相图热力学数据库，计算该体系不同成分合金的结晶驱动力、熔化焓和熔化温度，并结合表面能和粘度计算的经验公式，运用JMAK方程计算出不同合金的等温冷却转变曲线（TTT曲线）和制备非晶所需的临界冷却速度，探讨Ca、Sr、Ba微合金化对铝基非晶合金非晶形成能力的影响，预测微合金化最佳成分范围，为铝基非晶合金制备提供关键基础数据。

The main obstacle for the application of Al-based metallic glass is its limiting glass forming ability. Micro-alloying with Ca,Sr,Ba may be one of the important methods to improve the glass forming ability. Because of the speciality of Al-based metallic galss systems, many empirical rules, which has been successfully used in prediction of the glass forming ability of the other amorphous alloys,is ineffective in prediction of the glass forming ability in the Al-based metallic glass system. An approach combining crystallization thermodynamics and kinetics must be used to predict the glass forming ability of Al-based systems.In this project， the phase diagram of Al-(Ni,Co)-(Y,Gd)-(Ca,Sr,Ba) systems will be constructed with the equilibrium alloy, diffusion multiple and CALPHAD method;the thermodynamic database will be construct; Based on this database, the crystalization driving force, the heat of fusion,and the melting temperature will be calculated. Combining with the empirical rules on surface energy and viscousity, the TTT curve and the critical cooling rate for obtaining amorphous alloy will be caculated. The effect of micro-alloying of Ca，Sr,Ba to the glass forming ability of the Al alloy systems will be investigated and the best micro-alloying composition range will be predicted. This data will be very useful in the metallic glass preparation.