H. Tsubakino et al., HIGH-RESOLUTION TRANSMISSION ELECTRON-MICROSCOPIC STUDY OF THE FORMATION OF FE16N2 IN BULK IRON BY ION-IMPLANTATION, Materials letters, 26(3), 1996, pp. 155-159
High purity iron sheets were implanted with high-dose nitrogen ions ac
celerated to 150 keV. The implanted surfaces were examined by thin-fil
m X-ray diffraction method and high resolution transmission electron m
icroscopy (HRTEM). The implanted surfaces contain the metastable Fe16N
2 phase in addition to epsilon-nitride. HRTEM reveals that Fe16N2 doma
ins have lattice fringes of double spacing along the [121] direction o
f the matrix and spherical morphologies with coherent interfaces.