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TEM study on a new Zr-(Fe, Cu) phase in furnace-cooled Zr-1.0Sn-0.3Nb-0.3Fe-0.1Cu alloy

2018; Elsevier BV; Volume: 504; Linguagem: Inglês

10.1016/j.jnucmat.2018.03.008

1873-4820

Yushun Liu, Risheng Qiu, Baifeng Luan, Longlong Hao, Xinu Tan, Boran Tao, Yifan Zhao, Feitao Li, Qing Liu,

High Temperature Alloys and Creep

A new Zr-(Fe, Cu) phase was found in furnace-cooled Zr-1.0Sn-0.3Nb-0.3Fe- 0.1Cu alloy and alloys aged at 580 °C for 10min, 2 h and 10 h. Electron diffraction experiment shows the crystal structure of this phase to be body-centered tetragonal with unit cell dimensions determined to be a = b = 6.49 Å, c = 5.37 Å. Its possible space groups have been discussed and the reason accounting for its formation is believed to be the addition of Cu according to the atom-level images. In addition, no crystal structural or chemical composition changes were observed throughout the aging process.