Exposure to laser radiation for creation of metal materials nanoporous structures

Exposure to laser radiation for creation of nanoporous structures in the Cu–Zn alloy was investigated. It was established that exposure to laser pulse-periodic radiation with pulse repetition rate up to 5000 Hz makes it possible to form a nanoporous structure in the near-surface layer. The conditions of increase of area depth of such structures formation up to 40–45  μm were ascertained. The temperature and speed conditions which provide predominant channel-type nanopores formation with width of about 100 nm forming a nanoporous net were determined. This patented technology is a perspective for production of catalysts and microfiltration membranes.

► We realized exposure to laser pulse-periodic radiation on Cu–Zn alloy. ► Zn concentration on the surface was significantly reduced. ► Nanoporous structure was formed in the near-surface layer of the material. ► Structure with channel-type nanopores with width of about 100 nm was formed.