The oxidation resistance and ignition temperature of AZ31 magnesium alloy with additions of La2O3 and La

Zhao, Shizhe; Zhou, Hong; Zhou, Ti; Zhang, Zhihui; Lin, Pengyu; Liu, Ren

doi:10.1016/j.corsci.2012.10.007

Cited by 51 publications

(25 citation statements)

References 38 publications

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“…18b. The oxidation weight gains of both alloys were similar, and higher La content led to higher oxidation rates in both conditions [155].…”

Section: Gdmentioning

confidence: 94%

“…The increase in oxidation rate at the higher La content was attributed as a result of a reduced amount of β-Mg17Al12 in the AZ31 [155]. The "necklace" β-Mg17Al12was assumed to be an oxidation barrier [155].…”

Section: Gdmentioning

confidence: 99%

“…There were duplex MgO and SrO oxide layers on the Sr-containing alloys in both the solid and molten states after oxidation [178,180]. Unlike Ce, Nd and La [46,143,146,155], higher Sr contents led to higher ignition temperatures due to the high surface activity of Sr in liquid Mg [181]. Based on thermodynamic calculations [180], at 700…”

Section: Srmentioning

confidence: 99%

“…The "necklace" β-Mg17Al12was assumed to be an oxidation barrier [155]. A higher content La reacted with Al, forming Al11La3, which consumed Al in the matrix.…”

Section: Gdmentioning

confidence: 99%

“…Oxidation kinetic curves of AZ31 at 450 ℃ alloyed with (a) La: the lowest oxidation rate was obtained by alloying 0.75 wt.% La, higher La content increased the oxidation rate; (b) La 2 O 3 : lowest oxidation rate was obtained by alloying 0.74 wt.% La (converted from La 2 O 3 ), higher La 2 O 3 addition increased the oxidation rate. Redrawn from Zhao[155] and used with permission from Elsevier.…”

mentioning

confidence: 99%

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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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“…18b. The oxidation weight gains of both alloys were similar, and higher La content led to higher oxidation rates in both conditions [155].…”

Section: Gdmentioning

confidence: 94%

Section: Gdmentioning

confidence: 99%

Section: Srmentioning

confidence: 99%

“…The "necklace" β-Mg17Al12was assumed to be an oxidation barrier [155]. A higher content La reacted with Al, forming Al11La3, which consumed Al in the matrix.…”

Section: Gdmentioning

confidence: 99%

mentioning

confidence: 99%

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

et al. 2016

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A highly efficient composite separator embedded with colloidal lanthanum oxide nanocrystals for high‐temperature lithium‐ion batteries

et al. 2021

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Summary Highly efficient microporous composite separator based on polyvinylidene fluoride‐hexafluoro propylene (PVDF‐HFP) and colloidal La2O3 (C‐La2O3) is prepared for high‐temperature lithium‐ion batteries (LIBs) through facile slide coating technique. The presence of colloidal La2O3 nanocrystals in PVDF‐HFP significantly enhances the mechano‐thermal stability of separator due to the robust microporous structure. Moreover, the C‐La2O3 nanocrystals also help in improving the conductivity of lithium ions by incorporating additional Li+ conduction pathways due to the Lewis acid‐base interaction between La atom and PVDF‐HFP chain. The PVDF‐HFP/C‐La2O3 separator owns minimal shrinkage of 6.2% after thermal annealing for 1 hour at 150°C. The as‐developed separator exhibits high wettability and electrolyte uptake (238%) due to the robust microporous structure and low crystallinity, which leads towards high ionic conductivity (0.75 × 10−3 S cm−1). The cells developed with PVDF‐HFP/C‐La2O3 separator deliver the discharge capacity of 158.2 mAh g−1 at room temperature, 163 mAh g−1 on direct testing at 80°C, 130.9 mAh g−1 of batteries assembled with annealed separators at 150°C for 5 hours, and 140.3 mAh g−1 of annealed batteries at 150°C for 5 hours at 0.5 C after 100 cycles with a capacity retention of ≈98%. The PVDF‐HFP/C‐La2O3 separator is a promising substitute of commercial separators with remarkable performances for high‐temperature LIBs.

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Effect of Ce addition on the high‐temperature oxidation resistance of Mg–Gd alloys

Jiang

et al. 2022

Materials & Corrosion

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In the present study, the oxidation resistance of magnesium alloyed with Gd and Ce was investigated. The high-temperature oxidation resistance of Mg-3.5Gd-xCe (x = 0, 0.2, 0.4, 0.7 and 1.0 wt%) alloys was evaluated at temperatures between 550°C and 650°C. Results indicate that adding less than 0.7 wt% Ce resulted in high oxidation resistance, whereas the Ce addition exceeding 0.7 wt% deteriorated the oxidation resistance. The high oxidation resistance phenomenon is attributed to the formation of compact oxide films primarily composed of MgO, Gd 2 O 3 , and a small amount of CeO 2 on the surface of Mg-3.5Gd-0.2Ce and Mg-3.5Gd-0.4Ce alloys. These compact oxide films can prevent the matrix from experiencing further oxidation. The deteriorated oxidation resistances of Mg-3.5Gd-0.7Ce and Mg-3.5Gd-1Ce alloys were found to be due to the severe internal oxidation caused by the distributed Mg 12 Ce phases along the grain boundaries.

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The oxidation resistance and ignition temperature of AZ31 magnesium alloy with additions of La2O3 and La

Cited by 51 publications

References 38 publications

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

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

A highly efficient composite separator embedded with colloidal lanthanum oxide nanocrystals for high‐temperature lithium‐ion batteries

Effect of Ce addition on the high‐temperature oxidation resistance of Mg–Gd alloys

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