Study of the influence of both a modifier P and a nanomodifier ND on the structure of a hypereutectic aluminium-silicon alloy AlSi18

The process of hardening a hypereutectic aluminium-silicon alloy AlSi18 in unmodified, modified and nano-modified state has been studied. Two types of modifiers have been used - a standard modifier P, introduced into the melt by means of the ligature CuP 0,4wt.%, and a nanomodifier (nanodiamonds - ND) 0,1wt.%. The influence of the various types of modifiers on the process of crystallization, as well as on the size of the primary Si crystals in the structure of the alloy and their distribution in it has also been discussed. (paper)