{"title":"掺杂铌氧化物的缓冲二氧化铀燃料的烧结特性","authors":"Shalane Gobert , Fabienne Audubert , Jean-Marc Heintz","doi":"10.1016/j.jeurceramsoc.2024.117049","DOIUrl":null,"url":null,"abstract":"<div><div>An innovative nuclear fuel doped with a redox buffer is being developed to control the partial oxygen pressure (pO<sub>2</sub>) within the reactor and thereby limit stress corrosion cracking of the cladding. The selected redox buffer couple is Nb<sub>2</sub>O<sub>5</sub>/NbO<sub>2</sub>. The doping of the fuel affects its densification and final properties. Therefore, a study is being conducted on the densification behavior of this type of fuel and the influence of dopant concentration. The dopant was mixed with UO<sub>2</sub>, and the powder was then pressed into pellets, sintered under a reducing atmosphere. The linear shrinkage and oxygen release from the pellet were monitored during sintering. This method highlighted the reduction of niobium oxides during sintering, which causes oxygen release, influencing the densification behavior and microstructure of the doped fuel.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 4","pages":"Article 117049"},"PeriodicalIF":5.8000,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Sintering behaviour of buffered UO2 fuel doped with niobium oxides\",\"authors\":\"Shalane Gobert , Fabienne Audubert , Jean-Marc Heintz\",\"doi\":\"10.1016/j.jeurceramsoc.2024.117049\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>An innovative nuclear fuel doped with a redox buffer is being developed to control the partial oxygen pressure (pO<sub>2</sub>) within the reactor and thereby limit stress corrosion cracking of the cladding. The selected redox buffer couple is Nb<sub>2</sub>O<sub>5</sub>/NbO<sub>2</sub>. The doping of the fuel affects its densification and final properties. Therefore, a study is being conducted on the densification behavior of this type of fuel and the influence of dopant concentration. The dopant was mixed with UO<sub>2</sub>, and the powder was then pressed into pellets, sintered under a reducing atmosphere. The linear shrinkage and oxygen release from the pellet were monitored during sintering. This method highlighted the reduction of niobium oxides during sintering, which causes oxygen release, influencing the densification behavior and microstructure of the doped fuel.</div></div>\",\"PeriodicalId\":17408,\"journal\":{\"name\":\"Journal of The European Ceramic Society\",\"volume\":\"45 4\",\"pages\":\"Article 117049\"},\"PeriodicalIF\":5.8000,\"publicationDate\":\"2024-11-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of The European Ceramic Society\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0955221924009221\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The European Ceramic Society","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0955221924009221","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Sintering behaviour of buffered UO2 fuel doped with niobium oxides
An innovative nuclear fuel doped with a redox buffer is being developed to control the partial oxygen pressure (pO2) within the reactor and thereby limit stress corrosion cracking of the cladding. The selected redox buffer couple is Nb2O5/NbO2. The doping of the fuel affects its densification and final properties. Therefore, a study is being conducted on the densification behavior of this type of fuel and the influence of dopant concentration. The dopant was mixed with UO2, and the powder was then pressed into pellets, sintered under a reducing atmosphere. The linear shrinkage and oxygen release from the pellet were monitored during sintering. This method highlighted the reduction of niobium oxides during sintering, which causes oxygen release, influencing the densification behavior and microstructure of the doped fuel.
期刊介绍：
The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.
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