Figure 3104 shows HRTEM images of an amorphous Cu₆₀Zr₂₀Ti₂₀ specimen formed by melt-spinning [1]. The bright and dark contrast of the interconnected network indicates a compositional inhomogeneity in the materials, indicating a tendency of phase separation. In the FFT (fast Fourier transform) patterns, two halos corresponding to two different near-neighbor distances represent a phase separation of the glass. The maxima with a d-spacing of 0.21 nm correspond to 410 plane of Cu₅₁Zr₁₄ (Cu rich Zr poor region), while the maxima with a d-spacing of 0.243 nm correspond to 111 plane of Zr₂Cu phase (Zr rich Cu poor regions).

Figure 3104. High resolution TEM (HRTEM) images and the corresponding FFT patterns (inset) from two different regions of an amorphous Cu₆₀Zr₂₀Ti₂₀ alloy obtained by melt-spinning. [1]

[1] S. Vincent, Joysurya Basu, B.S. Murty, Jatin Bhatt, Micro indentation study on Cu60Zr20Ti20 metallic glass, Materials Science and Engineering A, 550 (2012) 160– 166.