Process for the preparation of polycrystalline structures having improved mechanical and physical properties

摘要

A method of making an article, the method comprising the steps of: a) electrodeposition of a metallic material comprising copper from an aqueous electrolyte comprising copper pyrophosphate using metallization current (DC) current pulse (PP ) and / or metallization reverse pulse (PR) using an average current density ranging from 5 to 10,000 mA / cm2, a service time by direct pulse ranges from 0.1 to 500 ms, a rest period that It ranges from 0 to 10,000 ms, a time of service reverse pulse varying from 0 to 500 ms, a density of maximum forward current that ranges from 5 to 10,000 mA / cm2, a density of reverse current 10 maximum ranging from 5-20000 mA / cm2, a frequency that varies from 0 to 1000 Hz and a duty cycle ranging from 5 to 100%, to form or at least partially metalized article having the metallic material i) size average grain between 4 nm and 5 microns, and ii ) A content of impurities less than 20 ppm by weight of S, less than 50 ppm by weight of O, less than 50 ppm by weight of P and less than 300 ppm by weight of C; b) heat treatment of the electrodeposited metallic material at a temperature between 20 K 0,7Tm 0,25Tm and for a period of time between 1 second and 75 hours to induce grain growth in the metallic material such that at least one portion of metal material shows an increase of at least 0.3 of the fraction of special grain boundary and an intensity value of the crystallographic texture of less than 7.5 times the random.