Early oxidation behaviors of Mg–Y alloys at high temperatures

High temperature oxidation behavior of Mg-Y-Sn, Mg-Y, Mg-Sn alloys and its effect on corrosion property

“…The Y 3d spectrum exhibits two peaks due to the spin orbit splitting into Y 3d 3/2 and Y 3d 5/2 components [16]: one at 159.1 eV and another peak at 157.7 eV. These values are in agreement with the value of Y 2 O 3 [16,18]. In the present study, the detected depth of XPS measurement is about 30 nm below the oxide/air interface.…”

“…The peak at 530.6 eV corresponds to Y 2 O 3 [15], the binding energy at 531.6 eV is attributed to MgO [14], and the other two peaks at 532.6 eV and 533.3 eV are attributed to OH − ion and CO 3 2− , respectively [14,16,17]. The Y 3d spectrum exhibits two peaks due to the spin orbit splitting into Y 3d 3/2 and Y 3d 5/2 components [16]: one at 159.1 eV and another peak at 157.7 eV. These values are in agreement with the value of Y 2 O 3 [16,18].…”

On the biodegradation performance of an Mg–Y–RE alloy with various surface conditions in simulated body fluid

“…Very similar behavior was also observed by Wang et al [15], who investigated the early oxidation behavior of Mg-Y alloys at high temperatures. XRD measurements, represented as normalized intensity over 2h in Fig.…”

The characterization of surface films formed on molten magnesium and AZ91D alloy in air/1,1,1,2-tetrafluoroethane atmospheres

“…For reaction (5), the change of its standard free energy is more negative than that of the reactions (6)-(10) and the content of Zn and Mn in AZ91D alloy is relatively fewer, so the reaction probability of Al with F 2 (reaction (5)) is greater than that of Zn, Mn with F 2 and O 2 (reactions (6)-(10)). As a result, the surface films on molten AZ91D alloy in the air containing high concentration of HFC-134a were mainly composed of MgF 2 with small amount of MgO and AlF 3 .…”

“…It is therefore necessary to take appropriate measures to prevent the melt from oxidizing and burning. Many methods have been investigated and applied to reduce or inhibit the oxidizing and burning of molten magnesium and its alloys in air, such as flux covering protection, gas protection without flux [3,4] and ignition-proof by alloying [5,6]. Among these methods, sulfur hexafluoride (SF 6 ) is currently considered as an effective protective gas and extensively used to prevent magnesium and its alloys from oxidizing and burning during melting and casting processes.…”