Prospects of Using Titanium Dioxide as a Component of Modifying Composition for Aluminum Casting Alloys

• Published in: Materials science forum Vol. 946; pp. 636 - 643
• Main Authors: Petrov, I.A., Ryakhovskii, A.P., Shlyaptseva, A.D.
• Format: Journal Article
• Language: English
• Published: Pfaffikon Trans Tech Publications Ltd 01.02.2019
• Subjects: Aluminum; Aluminum base alloys; Casting alloys; Fluorides; Titanium; Titanium dioxide; Thermodynamic Calculations; Modification; Silumin; Mechanical Properties; Fluorides; Titanium Dioxide
• ISSN: 0255-5476; 1662-9752; 1662-9752
• DOI: 10.4028/www.scientific.net/MSF.946.636

The authors studied the possibility of modifying aluminum-silicon alloys using titanium dioxide at standard melting temperatures up to 800 °C. The result is achieved due to the combined use of titanium dioxide and alkali and alkaline-earth metal fluorides. Calculations of the change in the Gibbs energy of chemical reactions of interaction of titanium dioxide with aluminum, cryolite, barium fluoride were carried out. The thermodynamic possibility of modifying silumin by the reduction of titanium from dioxide in the presence of additives selected was shown. Experimental melting was carried out and the results of mechanical tests of experimental alloys depending on the additives used were obtained. After melt treatment using the study combinations, the alloy structure becomes partially modified, which increases the mechanical properties of silumin.