The investment casting process is widely used in the aerospace industry to produce complex engine parts. The article determines the properties of quartz powders, nanosilica dioxide binders, and multilayer samples of ceramic casting molds. The properties of spherical molds obtained using an alcohol-water system derived from hydrolyzed ethyl silicate (ZKE) and LUDOX PX-30 (type Q1) were compared with those obtained in water systems derived from Remasol Plus and Remasol Premium binders (type Q2). The spherical samples are composed of seven layers made with the use of an immersion-sprinkling method. To assess the properties of the molds, X-ray microscopy (µCT), scanning electron microscopy (SEM), and gas permeability analysis over a temperature range of 20–950 °C were utilized. The binder type is proven to affect the properties of the casting mold samples. The material obtained in the water system, Q2, has advantageous properties such as a high porosity and gas permeability.

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In this study, the microstructure and corrosion resistance of the as-extruded and as-extruded with subsequent heat treatment Mg-3Al-1Zn-15Li (LAZ1531) alloys have been investigated. The alloysÕ microstructures consisted of a(Mg), b(Li), H-MgLi 2 Al and Mg 17 Al 12. As a result of annealing, the b(Li) to a(Mg) transformation occurred, and the recrystallization supported the reformation of the Mg 17 Al 12. The electrochemical tests showed that the increased amount of a(Mg) and higher amount of Mg 17 Al 12 in the heattreated alloy favored reactions and determined it as having better corrosion resistance in 3.5 wt.% NaCl.

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