The X-ray diffraction pattern of the FeeW coating electrodeposited
at 0.05 A cm2 is presented in Fig. 2(a). Only one broaden
peak is found at the angle of approximately 42, implying that the
as-deposited film was amorphous. Fig. 2(b) showed the TEM
morphology and the selected area electron diffraction pattern of
the FeeW coating. The concentric aureole of transmission electron
microscope further demonstrated that the FeeW coating is a kind
of amorphous material.