The High Temperature Oxidation Behavior of Mg–Gd–Y–Zr Alloy

Liu, Junwei; Liu, Ying; Wang, Fuhui

doi:10.1007/s11085-009-9145-2

Cited by 24 publications

(15 citation statements)

References 24 publications

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“…Because Mg-Y-Gd based alloys showed a high specific strength at both room and elevated temperatures [149], the study of Gd on oxidation was focused on Y-containing alloys. Liu et al [150] studied the solid-state oxidation behaviour of an Mg-Gd-Y-Zr alloy within the temperature range from 230 to 300 C in both O2 and O2 + H2O atmospheres. Gd and Y-containing Mg alloys showed low oxidation rates and negligible oxidation weight gains after 10 hour exposure in both atmospheres.…”

Section: Gdmentioning

confidence: 99%

Oxidation of magnesium alloys at elevated temperatures in air: A review

et al. 2016

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Highlights The oxidation behaviours of Mg alloys from low to high temperatures are reviewed. Characteristics of MgO during oxidation is discussed. Mechanisms of Mg oxidation is presented. Effect of various alloying elements is analysed. AbstractThis paper reviews (i) the oxidation of Mg alloys at elevated temperatures in air; (ii) the influence of alloying elements on the oxidation of Mg alloys; and (iii) the progress in the development of oxidation-resistant Mg alloys. Low oxidation rates have been shown by Mg alloys containing the alloying elements, Ca, Be and rare earth elements. However, these alloying elements may also decrease mechanical properties, such as ductility.

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Section: Gdmentioning

confidence: 99%

Oxidation of magnesium alloys at elevated temperatures in air: A review

et al. 2016

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“…4,5]. However, oxidation behavior studies at elevated temperatures have not been as widely pursued for Mg [6][7][8][9][10][11][12], but are relevant to applications such as automotive powertrain components, for example. The present authors recently demonstrated the feasibility of performing isotopic tracer studies of the film growth mechanism for the immersion of Mg in water, using sequential exposures in D 2 16 O and/or H 2 18 O water and secondary ion mass spectroscopy (SIMS) analysis [13].…”

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confidence: 99%

Tracer study of oxygen and hydrogen uptake by Mg alloys in air with water vapor

et al. 2015

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The oxidation of pure Mg, Mg-3Al-1Zn (AZ31B), and Mg-1Zn-0.25Zr-<0.5Nd (ZE10A) was studied at 85°C in humid air using sequential exposures with H 2 18 O and D 2 16 O for water vapor. Incorporation of 18 O in the hydroxide/oxide films indicated that oxygen from water vapor participated in the reaction. Penetration of hydrogen into the underlying metal was observed, particularly for the Zr-and Nd-containing ZE10A. Isotopic tracer profiles suggested a complex mixed inward/outward film growth mechanism.Magnesium alloys are of great interest for the manufacture of vehicle parts, biomedical implants, and functional applications involving hydrogen storage, batteries, and fuel cells [1][2][3]. Understanding the high reactivity and film formation mechanism(s) associated with Mg alloys is a key to improving corrosion resistance, as well as tailoring corrosion reaction/stability behaviors for biomedical and functional use. Both MgO and Mg(OH) 2 films are formed when Mg alloys are exposed to water [4,5].The corrosion behavior of Mg alloys in aqueous solutions has been widely studied [e.g. 4, 5]. However, oxidation behavior studies at elevated temperatures have not been as widely pursued for Mg [6][7][8][9][10][11][12], but are relevant to applications such as automotive powertrain components, for example. The present authors recently demonstrated the feasibility of performing isotopic tracer studies of the film growth mechanism for the immersion of Mg in water, using sequential exposures in D 2 16 O and/or H 2 18 O water and secondary ion mass spectroscopy (SIMS) analysis [13]. The goal of the present work was to extend this experimental approach to study the oxidation film growth mechanism of Mg in hot humid air.Ultrahigh purity Mg (UHP Mg) and two Mg alloys: AZ31B to represent the Mg-Al-Zn alloy class and Elektron Ò 717 (ZE10A grade, referred to as E717 for brevity), to represent the Mg-Zr-rare earth alloy class, were selected for study (Table 1). The same material batches and sample preparation methods as described in [13] were used in the present work. Test samples $9 mm in diameter and $1-1.5 mm thick were wet ground to P1200 grit finish, cleaned with acetone and deionized water, and dried with an air stream [13]. Samples were stored in a desiccator for at least 24 h prior to the tracer studies [13].Oxidation exposures were done at 85°C in humid air using a sealed stainless steel reaction vessel approach previously developed for geochemical hydration studies [15]. The reaction vessels ($24 cm 3 ) contained an inner Teflon liner to which 2 ml of isotopic tracer water was added, with the test sample suspended above the water in the vapor phase (humid air) in a Teflon mesh basket. The reaction vessels were then sealed and placed in a covered aluminum block holder inside of a convection oven at 85°C. At this temperature, these vessel and fluid volumes result in a two-phase http://dx.

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“…As aluminum was continually oxidized to form oxide film and oxygen consumed [13], the growth rate of the oxide layer was accelerated and the oxygen partial pressure of melt gradually decreased, the ability of [Si] oxidized was weakened, so the rate of Si burning slowed down gradually. Because the density of SiO 2 was slightly larger than that of Al, the oxidized SiO 2 was dispersed in the melt and sank slowly with holding time.…”

Section: Analysis and Discussionmentioning

confidence: 99%

Variational Principle of Si Content in Cast Al-Si Alloy During Melting Process

Ao¹,

Xing²,

Li³

et al. 2018

Proceedings of the International Symposium on Mechanical Engineering and Material Science (ISMEMS 2017)

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Abstract-The influence of temperate and time on variational principle of Si content in A356 recycled scrap during melting process was investigated in this paper. The results indicated that the variations of Si content showed conic laws which decreased firstly then increased with the holding time. The maximum descent, the full change content and the change rate all increased and the burning time shortened with the melting temperature increasing in the low and high temperature stage respectively. By thermodynamic analysis, we learned the change rates of Si content were decided both by the oxidation reaction of [Si] and reduction reaction of SiO2 by Al. The main factors affecting the redox reactions were O2 content, SiO2 content, melting temperature and so on. The reduction reaction of SiO2 played a major role in Si content with oxygen consumed and SiO2 produced lately.

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The High Temperature Oxidation Behavior of Mg–Gd–Y–Zr Alloy

Cited by 24 publications

References 24 publications

Oxidation of magnesium alloys at elevated temperatures in air: A review

Oxidation of magnesium alloys at elevated temperatures in air: A review

Tracer study of oxygen and hydrogen uptake by Mg alloys in air with water vapor

Variational Principle of Si Content in Cast Al-Si Alloy During Melting Process

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