{"title":"在刚玉骨料上浸涂片状六铝酸镧增强刚玉尖晶石浇注料的抗热震性","authors":"Yuan Feng, Donghai Ding, Guoqing Xiao, Endong Jin, Xing Hou, Xuan Jia","doi":"10.1016/j.jeurceramsoc.2025.117216","DOIUrl":null,"url":null,"abstract":"<div><div>The interface between the aggregates and matrix in corundum-spinel castables plays a crucial role in the thermal shock resistance. The lanthanum hexa-aluminate (LHA) interfacial layer between aggregates and matrix were prepared by dip-coating and heat-treatment. The microstructural evolution of the LHA interfacial layer and its effect on the thermal shock resistance of castables were investigated. The results indicated that the highest amount of platelet-like LHA crystals was formed after heat-treatment at 1600 ℃. The thermal shock resistance of the castables was significantly enhanced by the LHA interfacial layer, with the optimal residual strength ratio at 1600 ℃. The residual strength ratio after 3 thermal shock cycles were improved by 166 %. The specific fracture energy of the aggregate/matrix interface obtained by nanoindentation was increased by the LHA interfacial layers which promoted the crack deflection and branching in the interface and inhibit the cracks cross through the aggregates.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"45 7","pages":"Article 117216"},"PeriodicalIF":6.3000,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhanced thermal shock resistance of corundum-spinel castables by dip-coating of platelet-like lanthanum hexa-aluminate on corundum aggregates\",\"authors\":\"Yuan Feng, Donghai Ding, Guoqing Xiao, Endong Jin, Xing Hou, Xuan Jia\",\"doi\":\"10.1016/j.jeurceramsoc.2025.117216\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The interface between the aggregates and matrix in corundum-spinel castables plays a crucial role in the thermal shock resistance. The lanthanum hexa-aluminate (LHA) interfacial layer between aggregates and matrix were prepared by dip-coating and heat-treatment. The microstructural evolution of the LHA interfacial layer and its effect on the thermal shock resistance of castables were investigated. The results indicated that the highest amount of platelet-like LHA crystals was formed after heat-treatment at 1600 ℃. The thermal shock resistance of the castables was significantly enhanced by the LHA interfacial layer, with the optimal residual strength ratio at 1600 ℃. The residual strength ratio after 3 thermal shock cycles were improved by 166 %. The specific fracture energy of the aggregate/matrix interface obtained by nanoindentation was increased by the LHA interfacial layers which promoted the crack deflection and branching in the interface and inhibit the cracks cross through the aggregates.</div></div>\",\"PeriodicalId\":17408,\"journal\":{\"name\":\"Journal of The European Ceramic Society\",\"volume\":\"45 7\",\"pages\":\"Article 117216\"},\"PeriodicalIF\":6.3000,\"publicationDate\":\"2025-07-01\",\"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/S0955221925000366\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/1/14 0:00:00\",\"PubModel\":\"Epub\",\"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/S0955221925000366","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/14 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Enhanced thermal shock resistance of corundum-spinel castables by dip-coating of platelet-like lanthanum hexa-aluminate on corundum aggregates
The interface between the aggregates and matrix in corundum-spinel castables plays a crucial role in the thermal shock resistance. The lanthanum hexa-aluminate (LHA) interfacial layer between aggregates and matrix were prepared by dip-coating and heat-treatment. The microstructural evolution of the LHA interfacial layer and its effect on the thermal shock resistance of castables were investigated. The results indicated that the highest amount of platelet-like LHA crystals was formed after heat-treatment at 1600 ℃. The thermal shock resistance of the castables was significantly enhanced by the LHA interfacial layer, with the optimal residual strength ratio at 1600 ℃. The residual strength ratio after 3 thermal shock cycles were improved by 166 %. The specific fracture energy of the aggregate/matrix interface obtained by nanoindentation was increased by the LHA interfacial layers which promoted the crack deflection and branching in the interface and inhibit the cracks cross through the aggregates.
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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