High-resolution transmission electron microscopy of some Tin+1AXn compounds (n=1, 2; A=Al or Si; X=C or N)
作者： L. Farber , I. Levin , M. W. Barsoum , T. El-Raghy , T. Tzenov
DOI: 10.1063/1.371089
关键词:
摘要: The crystal structures of Ti2AlN, Ti3SiC2, and Ti3AlC1.8, studied by high-resolution transmission electron microscopy confirmed the P63/mmc space group layered nature these ternaries. structure Ti2AlN agrees with that previously determined from analysis x-ray neutron diffraction data. Conversely, thinned Ti3SiC2 Ti3AlC1.8 samples differ bulk as analysis. Since both have identical symmetries lattice parameters, differences—which involve shearing Si or Al planes in opposite directions—are indistinguishable conventional microscopy. This polymorphic phase transformation Tin+1AXn compounds, for n⩾2, is discussed relation to dimensionally induced hexagonal close-packed face-centered-cubic transformations Ti-based thin multilayers.
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