Atomic structure and lattice defects in nanolaminated ternary transition metal borides

作者：Lu Jun^*; Kota Sankalp; Barsoum Michel W; Hultman Lars

来源：Materials Research Letters, 2017, 5(4): 235-241.

DOI：10.1080/21663831.2016.1245682

• Nanolaminated ternary transition metal borides
• STEM Z-contrast images
• EDX
• crystal structure
• defects

We use analytical aberration-corrected high-resolution scanning transmission electron microscopy to image the atomic structure of the layered ternary transition metal (M) borides, Cr2AlB2, Fe2AlB2, and MoAlB. In these ternaries, MB layers and Al single or double atomic layers are interleaved. The atomic positions of the M elements and Al are clearly resolved by Z-contrast images. The following structural defects are also found and described herein: a 90 degrees twist boundary along [010] in Cr2AlB2, a tilt boundary in Fe2AlB2, and Mo2AlB2-like stacking faults in MoAlB, where some of the MB-based structures are intercalated by one (instead of two) Al layer(s).

• 出版日期2017