{"title":"Self-driven bidirectional redistribution of Zr species constructing a dual oxidation barrier in SiC-ZrC ultrafine fibers","authors":"Haiyan Liu, Xiaoshan Zhang, Wenxin Wu, Chong Wang, Yu Deng, Cheng Han, Xiaozhou Wang, Bing Wang","doi":"10.1016/j.jmst.2026.09.022","DOIUrl":"https://doi.org/10.1016/j.jmst.2026.09.022","url":null,"abstract":"Silicon carbide (SiC) ultrafine fibers hold great promise for flexible thermal protection systems, yet their service temperature is severely limited by oxidative degradation above 1300 °C. Herein, SiC-ZrC ultrafine fibers (SZF) with linearly tunable Zr content are fabricated by electrospinning, electron-beam curing, and carbothermal pyrolysis. The optimal SZF-20 maintains structural integrity after oxidation at 1600 °C for 30 min and at 1300 °C for 30 h in air. Focused ion beam sectioning and transmission electron microscope reveal temperature-dependent spatial redistribution of Zr species across the oxide scale. During high-temperature oxidation, nonstoichiometric ZrO<ce:italic><ce:inf loc=\"post\">x</ce:inf></ce:italic>C<ce:italic><ce:inf loc=\"post\">y</ce:inf></ce:italic> intermediates redistribute inward along the advancing oxidation front and accumulate at the oxide-matrix interface, forming a linear, high-melting-point inner ZrO<ce:inf loc=\"post\">2</ce:inf> barrier. Meanwhile, some ZrO<ce:inf loc=\"post\">2</ce:inf> grains segregate outward as the SiO<ce:inf loc=\"post\">2</ce:inf> matrix crystallizes into cristobalite, pinning grain boundaries to create an outer passivation layer. This dual-barrier architecture synergistically suppresses oxygen ingress and microcrack formation, thereby enabling reliable short-term high-temperature oxidation tolerance up to 1600 °C. The assembled fiber aerogels demonstrate nearly full shape recovery with residual strain below 1% following 80% compression, good thermal shock stability over repeated rapid cycles between 1600 and 25 °C, and low thermal conductivity, highlighting their great potential as reusable high-temperature thermal protection materials.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"14 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149087125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yan Liu,Bin Tang,Jinshan Li,Fanrong Ai,Anping Dong
{"title":"Strain partitioning and recrystallization suppression via intralamellar β0 precipitates in a β-solidified γ-TiAl alloy during hot deformation","authors":"Yan Liu,Bin Tang,Jinshan Li,Fanrong Ai,Anping Dong","doi":"10.1016/j.jmst.2026.08.109","DOIUrl":"https://doi.org/10.1016/j.jmst.2026.08.109","url":null,"abstract":"","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"1 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149089328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Structural evolution and mechanical properties of metallic disordered materials influenced by the Bragg effect of ion irradiation","authors":"Wenhui He,Bingyao Liu,Kang Sun,Zhixin Tan,Taisen Zuo,He Cheng,Haoran Jiang,Jochi Tseng,Yandong Jia,Gang Wang","doi":"10.1016/j.jmst.2026.09.057","DOIUrl":"https://doi.org/10.1016/j.jmst.2026.09.057","url":null,"abstract":"","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"16 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149089329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}