Fig. 1
Homogeneous NiCoCrx Crystals a STEM image of columns of atoms along the [100] direction from a NiCoCr single crystal. These images and associated EELS (electron energy loss spectroscopy) data taken at the same time do not detect any evidence of elemental clustering or ordering. Each “atom” in the figure is actually a column of atoms about 20 nm in length. The white scale bar corresponds to 0.5 nm. Clustering of Cr atoms would, for example, produce regions of lower image intensity. The distance between columns is approximately 0.18 nm, and this would also vary if significant clustering occurred. The images were obtained using a Nion UltraSTEM200 operated at 200 kV with an illumination half-angle of 30 mrad and an inner detector half-angle of 65 mrad. b Laue X-ray image from a 10 g NiCoCr0.8 crystal shown at the bottom
