The Crystallization Process of Zr-Based Metallic Glass by the Influence of Heating Rate and Alloy Composition

Abstract

Abstract A study of the crystallization process of Zr-based Metallic Glass by the influence of the heating rate and variation of alloy composition was investigated. The alloys used were Zr68Cu14Ni11Al7, Zr64.5Cu17Ni11Al7.5, and Zr69.5Cu12Ni11Al7.5. Thermal stability was analyzed using DSC (Differential Scanning Calorimetry) with a heating rate of 5°C/min and 10°C/min until the temperature reached 500°C. The three samples were heated with temperature variations of 400°C, 425°C, and 450°C for one hour in air. Crystal growth was observed by XRD test. The DSC curve of the three samples shows that the higher the rate of heating, the shift of the crystallization peak temperature shifts to a higher temperature. At higher temperatures, the crystallization process occurs faster than at lower temperatures. The composition of zirconium contributes to the resistance properties of crystallization. The alloy with the highest zirconium composition has a high resistance to crystallization. The crystalline phase formed is ZrO2 tetragonal in all samples heated at a temperature of 450°C, and there is an intermetallic phase of Zr2Ni identified on Zr64.5Cu17Ni11Al7.5