Amorphization and crystallization of Zr66.7-xCu33.3Nbx (x=0, 2, 4) alloys during mechanical alloying

作者：Wang, Yan; Chen, Xiuxiu; Geng, Haoran^*; Yang, Zhongxi

来源：Journal of Alloys and Compounds, 2009, 474(1-2): 152-157.

DOI：10.1016/j.jallcom.2008.06.137

• Amorphous alloys
• Mechanical alloying
• X-ray diffraction
• Microstructure

In the present paper, the effect of Nb and different rotation speeds on the amorphization and crystallization of Zr66.7-xCu33.3Nbx (x = 0, 2, 4) alloys during mechanical alloying has been investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). The results show that the minor addition of Nb can shorten the start time of the amorphization reaction, improve the glass forming ability of Zr-Cu alloys, but cannot promote the formation of a single amorphous phase at a lower rotation speed of 200 rpm. The glass forming ability of the Zr66.7-xCu33.3Nbx (x = 0, 2,4) alloys increases with increasing Nb additions. At a higher rotation speed of 350 rpm, a single amorphous phase of Zr66.7-xCu33.3Nbx (x = 0, 2,4) can be successfully fabricated. Moreover, the Nb addition into Zr-Cu alloys can accelerate the amorphization process and improve the stability of the amorphous phase against the mechanically induced crystallization. Furthermore, the amorphous Zr66.7Cu33.3 phase gradually transforms into a metastable fcc-Zr2Cu phase with increasing milling time.

• 出版日期2009-4-17
• 单位济南大学; 山东大学