Mg alloys are usually used at room temperatures but and at higher temperatures and oxidizing atmospheres in different stages of processing, such as: overheating of the charge, melting, casting, heat treatment, etc. But those conditions result undesirable effects that change chemical properties and deteriorate structural properties of the surface layers. Therefore the knowledge of oxidation of Mg-alloys at different temperatures is important. Mg alloys: AE42, AZ91, AM50, and AM60 were exposed to oxidation at different temperatures in order to determinate high-temperature oxidation resistance.
COBISS.SI-ID: 1105759
The process is based on the infiltration of melt in the pores of ceramic foam which acts as the hardening phase. The casting process, mould dimension, preheating of ceramic foam or mould, pouring temperature, isolation thermal cover and vibration allow perfect filling of pores with melt. The gravity casting is used. Typical for this process is that during the casting and solidification the entire system vibrates.
COBISS.SI-ID: 14898454