Atomistic dynamics of amorphous porous nitinol

Due to the unique combination of physico-mechanical characteristics, titanium nickelide (nitinol) is of great applied interest in various industries. In the present work, the possibility of obtaining of nitinol with a mesoporous structure by rapidly cooling of molten sample to room temperature is considered. Based on the atomistic dynamics simulations data, it was shown that the rapid cooling of the nitinol melt leads to the formation of a porous structure. It has been found that the inner wall of pores is formed predominantly by titanium atoms, which ensure the biocompatibility of nitinol. It is established that the nitinol porosity depends weakly on the cooling rate, whereas the porosity increases linearly with decreasing melt density.