Open AccessA TEM STUDY OF THE CRYSTALLIZATION OF AMORPHOUS Ni-Zr ALLOY(I)——METASTABLE PHASES FORMED DURING CRYSTALLIZATION OF Ni67Zr33
Author(s) -
Yunlong Guo,
Z. K. Hei,
Wu Yu-Kun,
Kaihua Guo
Publication year - 1986
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.35.359
Subject(s) - crystallization , materials science , metastability , tetragonal crystal system , transmission electron microscopy , orthorhombic crystal system , crystallography , alloy , amorphous solid , phase (matter) , amorphous metal , crystal structure , thermodynamics , composite material , physics , chemistry , nanotechnology , quantum mechanics
The crystallization behaviour of Ni67Zr33 amorphous alloy has been studied by using transmission electron microscopy. Two metastable phases, T0 and T1, have been found at 500℃. The T1 phase has a body centred orthorhombic er pseudo-tetragonal lattice (α≌b=0.89 nm, c=3.14nm) and the Ibα2 or Ibαm space group. As the temperature increases, the metastable phases gradually change into the stable phase T2(Ni10Zr7) containing a lot of faults. The diffraction streaks parallel to c* with h+k ≠ 2n can be explained satisfactorily by the 1/2(α+ b) displac ement of (001) plane in T2. The final stable phases are Ni10Zr7 and Ni21Zr8.