N. Favart, B. Ravat, L. Jolly, I. Zacharie-Aubrun, P. Martin, D. Menut, I. Popa, B. Oudot
{"title":"干氧大气暴露下 δ-PuGa (1 at%. Ga) 氧化的特性分析","authors":"N. Favart, B. Ravat, L. Jolly, I. Zacharie-Aubrun, P. Martin, D. Menut, I. Popa, B. Oudot","doi":"10.1007/s11085-024-10267-6","DOIUrl":null,"url":null,"abstract":"<div><p>The oxidation of δ-stabilized plutonium alloy was studied under dry oxygen exposures for temperatures varying from 100 up to 300 °C and oxygen partial pressures varying from 10<sup>–4</sup> up to 500 mbar. The coupling of X-ray diffraction, Raman spectroscopy and FIB-SEM has allowed to show that the oxide scale is composed of an outer layer of PuO<sub>2</sub> and an inner mixed layer of α + β-Pu<sub>2</sub>O<sub>3</sub> platelets propagating into a metallic zone corresponding to the stable phase of unalloyed Pu. Furthermore, the analysis of Pu oxidation kinetics has displayed first a parabolic growth governed by the diffusion of interstitial oxygen. This step consists of the thickening of the Pu<sub>2</sub>O<sub>3</sub> layer with a decrease in α-Pu<sub>2</sub>O<sub>3</sub> ratio in favor of β-Pu<sub>2</sub>O<sub>3</sub>. Then, a second step occurs consisting of a linear growth of the PuO<sub>2</sub>-layer with the formation of thick nodules which tend to cover the whole oxide surface. Based on the results of this work, a general oxidation mechanism for δ-Pu alloy is provided.</p></div>","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":"101 5","pages":"885 - 896"},"PeriodicalIF":2.1000,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11085-024-10267-6.pdf","citationCount":"0","resultStr":"{\"title\":\"Characterization of δ-PuGa (1 at%. Ga) Oxidation Under Dry Oxygen Atmosphere Exposure\",\"authors\":\"N. Favart, B. Ravat, L. Jolly, I. Zacharie-Aubrun, P. Martin, D. Menut, I. Popa, B. Oudot\",\"doi\":\"10.1007/s11085-024-10267-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The oxidation of δ-stabilized plutonium alloy was studied under dry oxygen exposures for temperatures varying from 100 up to 300 °C and oxygen partial pressures varying from 10<sup>–4</sup> up to 500 mbar. The coupling of X-ray diffraction, Raman spectroscopy and FIB-SEM has allowed to show that the oxide scale is composed of an outer layer of PuO<sub>2</sub> and an inner mixed layer of α + β-Pu<sub>2</sub>O<sub>3</sub> platelets propagating into a metallic zone corresponding to the stable phase of unalloyed Pu. Furthermore, the analysis of Pu oxidation kinetics has displayed first a parabolic growth governed by the diffusion of interstitial oxygen. This step consists of the thickening of the Pu<sub>2</sub>O<sub>3</sub> layer with a decrease in α-Pu<sub>2</sub>O<sub>3</sub> ratio in favor of β-Pu<sub>2</sub>O<sub>3</sub>. Then, a second step occurs consisting of a linear growth of the PuO<sub>2</sub>-layer with the formation of thick nodules which tend to cover the whole oxide surface. Based on the results of this work, a general oxidation mechanism for δ-Pu alloy is provided.</p></div>\",\"PeriodicalId\":724,\"journal\":{\"name\":\"Oxidation of Metals\",\"volume\":\"101 5\",\"pages\":\"885 - 896\"},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2024-08-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s11085-024-10267-6.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Oxidation of Metals\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11085-024-10267-6\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"METALLURGY & METALLURGICAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Oxidation of Metals","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11085-024-10267-6","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
Characterization of δ-PuGa (1 at%. Ga) Oxidation Under Dry Oxygen Atmosphere Exposure
The oxidation of δ-stabilized plutonium alloy was studied under dry oxygen exposures for temperatures varying from 100 up to 300 °C and oxygen partial pressures varying from 10–4 up to 500 mbar. The coupling of X-ray diffraction, Raman spectroscopy and FIB-SEM has allowed to show that the oxide scale is composed of an outer layer of PuO2 and an inner mixed layer of α + β-Pu2O3 platelets propagating into a metallic zone corresponding to the stable phase of unalloyed Pu. Furthermore, the analysis of Pu oxidation kinetics has displayed first a parabolic growth governed by the diffusion of interstitial oxygen. This step consists of the thickening of the Pu2O3 layer with a decrease in α-Pu2O3 ratio in favor of β-Pu2O3. Then, a second step occurs consisting of a linear growth of the PuO2-layer with the formation of thick nodules which tend to cover the whole oxide surface. Based on the results of this work, a general oxidation mechanism for δ-Pu alloy is provided.
期刊介绍：
Oxidation of Metals is the premier source for the rapid dissemination of current research on all aspects of the science of gas-solid reactions at temperatures greater than about 400˚C, with primary focus on the high-temperature corrosion of bulk and coated systems. This authoritative bi-monthly publishes original scientific papers on kinetics, mechanisms, studies of scales from structural and morphological viewpoints, transport properties in scales, phase-boundary reactions, and much more. Articles may discuss both theoretical and experimental work related to gas-solid reactions at the surface or near-surface of a material exposed to elevated temperatures, including reactions with oxygen, nitrogen, sulfur, carbon and halogens. In addition, Oxidation of Metals publishes the results of frontier research concerned with deposit-induced attack. Review papers and short technical notes are encouraged.
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