Irradiation of titanium, zirconium, and hafnium nitrides with high-energy ions

摘要

We have identified structural and morphological changes produced by irradiation with 167-MeV Xe-+24(136) ions to a fluence of 5.3 x 10(14) cm(-2) in Ti, Zr, and Hf nitrides prepared using oxidation-assisted engineering. Irradiation of TiN (x) and HfN (x) leads to the formation of nano- and micropores in the surface layer of the samples. The surface layer of ZrN (x) samples contains nanopores both before and after irradiation. The presence of pores in the unirradiated ZrN (x) samples probably ensures the possibility of structural relaxation without further pore formation under irradiation. The irradiated ZrN (x) samples have local crystal structure distortions unrelated to dislocations and attributable to the impact of high-energy xenon ions.