Hongchao Kou, Xidong Hui, Xiongjun Liu, Xiping Song, Guoliang Chen, and Kefu Yao, Effects of small amount Ta on the characteristics of the Zr-Al-Ni-Cu-Ta bulk metallic glass, J. Univ. Sci. Technol. Beijing, 12(2005), No. 3, pp. 257-261.
Cite this article as:
Hongchao Kou, Xidong Hui, Xiongjun Liu, Xiping Song, Guoliang Chen, and Kefu Yao, Effects of small amount Ta on the characteristics of the Zr-Al-Ni-Cu-Ta bulk metallic glass, J. Univ. Sci. Technol. Beijing, 12(2005), No. 3, pp. 257-261.
Hongchao Kou, Xidong Hui, Xiongjun Liu, Xiping Song, Guoliang Chen, and Kefu Yao, Effects of small amount Ta on the characteristics of the Zr-Al-Ni-Cu-Ta bulk metallic glass, J. Univ. Sci. Technol. Beijing, 12(2005), No. 3, pp. 257-261.
Citation:
Hongchao Kou, Xidong Hui, Xiongjun Liu, Xiping Song, Guoliang Chen, and Kefu Yao, Effects of small amount Ta on the characteristics of the Zr-Al-Ni-Cu-Ta bulk metallic glass, J. Univ. Sci. Technol. Beijing, 12(2005), No. 3, pp. 257-261.
The effects of Ta on the characteristics of the Zr-base BMG (bulk metallic glass) were investigated. Zr55Al10Ni5Cu30-xTax (x=1, 2,4) bulk metallic glasses (BMGs) with 3.5 mm diameter and 70 mm length were successfully prepared by using combined jet and copper mold casting. A small amount of Ta addition does not change the glass transition temperature, crystallization temperature,and supercooled liquid region obviously, but Ta promotes composition separation and two-stage crystallization. The stable crystalline phases include Zr2Ni, CuZr2, Al2Zr3 intermetallic compounds and Ta-rich solid solution after annealing the Zr-Al-Ni-Cu-Ta alloys at 753 K. Zr55Al10Ni5Cu30-xTax (x=1,2,4) bulk glassy alloys exhibit a better compressive strength. The stress-strain curve shows a zigzag feature, and the fracture surface shows intersecting of shear bands. It may correlate with the inhomogeneous feature of amorphous structure.
The effects of Ta on the characteristics of the Zr-base BMG (bulk metallic glass) were investigated. Zr55Al10Ni5Cu30-xTax (x=1, 2,4) bulk metallic glasses (BMGs) with 3.5 mm diameter and 70 mm length were successfully prepared by using combined jet and copper mold casting. A small amount of Ta addition does not change the glass transition temperature, crystallization temperature,and supercooled liquid region obviously, but Ta promotes composition separation and two-stage crystallization. The stable crystalline phases include Zr2Ni, CuZr2, Al2Zr3 intermetallic compounds and Ta-rich solid solution after annealing the Zr-Al-Ni-Cu-Ta alloys at 753 K. Zr55Al10Ni5Cu30-xTax (x=1,2,4) bulk glassy alloys exhibit a better compressive strength. The stress-strain curve shows a zigzag feature, and the fracture surface shows intersecting of shear bands. It may correlate with the inhomogeneous feature of amorphous structure.
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