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Role of rare earth oxide modification in strengthening ZrB2-SiC composites against oxidation and cyclic ablation

Mengen HuKey Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, ChinaXian DangInstitute of Solid State PhysicsChengwan YangKey Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, ChinaKewei LiKey Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, ChinaHanwen ZhangInstitute of Solid State PhysicsZhen WangKey Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, ChinaShuxin LiKey Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, ChinaYuebin LiKey Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, ChinaXiaoye HuUniversity of Science and Technology of China, Hefei, 230026, ChinaYue LiKey Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, ChinaAbdumutolib AtakhanovInstitute of Polymer Chemistry and Physics, Uzbekistan Academy of Sciences, Tashkent 100128, UzbekistanZhulin HuangInstitute of Solid State PhysicsGuowen MengInstitute of Solid State Physics

Extreme Materialsjournal2025en

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Litsenziya: cc-by-nc-nd

Manbada oʻqishdoi.org(yangi oynada ochiladi)

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Annotatsiya

ZrB 2 -20SiC (ZS20) composite and its derivatives doped with 5 vol% Sc 2 O 3 , Y 2 O 3 , and La 2 O 3 were densified using hot press sintering to investigate the influence of rare earth oxides on their high temperature oxidation and ablation behavior. Isothermal oxidation testing at 1773 K indicate that rare earth oxides modification lowers activation energy and slightly accelerates weight gain during the initial phase. As oxidation progresses, the weight gain of ZS20 increases sharply. The sample doped with La 2 O 3 (ZS20L5) exhibits the lowest oxidation weight gain, with a porosity of only 1.8% after oxidation. Cyclic ablation tests at the middle-low temperature zones indicate that ZS20L5 exhibits the lowest linear and mass ablation rates. Thermodynamic analyses demonstrate that La 2 O 3 preferentially reacts with SiO 2 to form La 2 Si 2 O 7 , which demonstrates a more effective oxygen barrier property compared to ZrSiO 4 . Additionally, La 2 O 3 enhances the fluidity of the glass phase, effectively filling cracks, sealing pores, and blocking the penetration of oxygen.

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Mavzular

Advanced ceramic materials synthesis MXene and MAX Phase Materials Intermetallics and Advanced Alloy Properties

Identifikatorlar

DOI: 10.1016/j.exm.2025.12.001

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