The Pilling-Bedworth Ratio of Oxides Formed From the Precipitated Phases in Magnesium Alloys

The Pilling-Bedworth ratio of oxides preferentially formed from the precipitated phases in magnesium alloys were calculated. The results showed that the PBR value of Nd2O3 preferentially formed from Mg12Nd was 1.0584, and the PBR value of Y2O3 preferentially formed from Mg24Y5 was 1.1923. Both the N...

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Autores principales: Quantong Jiang, Dongzhu Lu, Chang Liu, Nazhen Liu, Baorong Hou
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Publicado: Frontiers Media S.A. 2021
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spelling oai:doaj.org-article:dd1359008d0042668383190d800b1ddd2021-11-16T05:13:45ZThe Pilling-Bedworth Ratio of Oxides Formed From the Precipitated Phases in Magnesium Alloys2296-801610.3389/fmats.2021.761052https://doaj.org/article/dd1359008d0042668383190d800b1ddd2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmats.2021.761052/fullhttps://doaj.org/toc/2296-8016The Pilling-Bedworth ratio of oxides preferentially formed from the precipitated phases in magnesium alloys were calculated. The results showed that the PBR value of Nd2O3 preferentially formed from Mg12Nd was 1.0584, and the PBR value of Y2O3 preferentially formed from Mg24Y5 was 1.1923. Both the Nd2O3 and Y2O3 would provide a good protection to the Mg matrix. The Gd2O3 preferentially formed from Mg3Gd, whereas the MgO preferentially formed from MgNi2. The PBR value of these two oxides were both larger than 2. The corresponding oxides formed from the common precipitated phases Mg17Al12, MgZn2, MgCu2, Mg2Ca, Mg12Ce, and MgAg were all less than 1. The oxide films formed on surfaces of pure Mg and Mg-xY (x = 3, 5, 7 wt.%) alloys at high temperatures were analyzed. The results showed that the oxide films were composed of a Y2O3/MgO outer layer and an inner layer rich with Y2O3. The formation of Y2O3 was mainly caused by the oxidation of Mg24Y5. The more Y2O3 existed in the composite oxidation film, the better corrosion resistance of the Mg-Y samples.Quantong JiangQuantong JiangQuantong JiangDongzhu LuDongzhu LuDongzhu LuChang LiuChang LiuChang LiuNazhen LiuNazhen LiuNazhen LiuBaorong HouBaorong HouBaorong HouFrontiers Media S.A.articleoxidePBR valuemagnesium alloysprecipitated phasesMg-YTechnologyTENFrontiers in Materials, Vol 8 (2021)
institution DOAJ
collection DOAJ
language EN
topic oxide
PBR value
magnesium alloys
precipitated phases
Mg-Y
Technology
T
spellingShingle oxide
PBR value
magnesium alloys
precipitated phases
Mg-Y
Technology
T
Quantong Jiang
Quantong Jiang
Quantong Jiang
Dongzhu Lu
Dongzhu Lu
Dongzhu Lu
Chang Liu
Chang Liu
Chang Liu
Nazhen Liu
Nazhen Liu
Nazhen Liu
Baorong Hou
Baorong Hou
Baorong Hou
The Pilling-Bedworth Ratio of Oxides Formed From the Precipitated Phases in Magnesium Alloys
description The Pilling-Bedworth ratio of oxides preferentially formed from the precipitated phases in magnesium alloys were calculated. The results showed that the PBR value of Nd2O3 preferentially formed from Mg12Nd was 1.0584, and the PBR value of Y2O3 preferentially formed from Mg24Y5 was 1.1923. Both the Nd2O3 and Y2O3 would provide a good protection to the Mg matrix. The Gd2O3 preferentially formed from Mg3Gd, whereas the MgO preferentially formed from MgNi2. The PBR value of these two oxides were both larger than 2. The corresponding oxides formed from the common precipitated phases Mg17Al12, MgZn2, MgCu2, Mg2Ca, Mg12Ce, and MgAg were all less than 1. The oxide films formed on surfaces of pure Mg and Mg-xY (x = 3, 5, 7 wt.%) alloys at high temperatures were analyzed. The results showed that the oxide films were composed of a Y2O3/MgO outer layer and an inner layer rich with Y2O3. The formation of Y2O3 was mainly caused by the oxidation of Mg24Y5. The more Y2O3 existed in the composite oxidation film, the better corrosion resistance of the Mg-Y samples.
format article
author Quantong Jiang
Quantong Jiang
Quantong Jiang
Dongzhu Lu
Dongzhu Lu
Dongzhu Lu
Chang Liu
Chang Liu
Chang Liu
Nazhen Liu
Nazhen Liu
Nazhen Liu
Baorong Hou
Baorong Hou
Baorong Hou
author_facet Quantong Jiang
Quantong Jiang
Quantong Jiang
Dongzhu Lu
Dongzhu Lu
Dongzhu Lu
Chang Liu
Chang Liu
Chang Liu
Nazhen Liu
Nazhen Liu
Nazhen Liu
Baorong Hou
Baorong Hou
Baorong Hou
author_sort Quantong Jiang
title The Pilling-Bedworth Ratio of Oxides Formed From the Precipitated Phases in Magnesium Alloys
title_short The Pilling-Bedworth Ratio of Oxides Formed From the Precipitated Phases in Magnesium Alloys
title_full The Pilling-Bedworth Ratio of Oxides Formed From the Precipitated Phases in Magnesium Alloys
title_fullStr The Pilling-Bedworth Ratio of Oxides Formed From the Precipitated Phases in Magnesium Alloys
title_full_unstemmed The Pilling-Bedworth Ratio of Oxides Formed From the Precipitated Phases in Magnesium Alloys
title_sort pilling-bedworth ratio of oxides formed from the precipitated phases in magnesium alloys
publisher Frontiers Media S.A.
publishDate 2021
url https://doaj.org/article/dd1359008d0042668383190d800b1ddd
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