Oxidation behavior of high-entropy (Zr0.2Hf0.2Ta0.2Nb0.2Ti0.2)B2 ceramic with 20% SiC addition

被引：6
作者：
Guo, Ruru [1 ]
Li, Zhijian [1 ]
Li, Lu [2 ,3 ]
Zheng, Ruixiao [1 ]
Ma, Chaoli [2 ,3 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Key Lab Aerosp Adv Mat & Performance, Minist Educ, Beijing 100191, Peoples R China
[2] Beihang Univ, Res Inst Frontier Sci, Beijing 100191, Peoples R China
[3] Beihang Univ, Yunnan Innovat Inst, Kunming 650000, Yunnan, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2024年 / 44卷 / 08期
关键词：
High -entropy ceramic; Transition metal boride; SiC addition; Oxidation behavior; METAL DIBORIDES; COMPOSITES; ZIRCONIUM; DESIGN; ZRB2;
D O I：
10.1016/j.jeurceramsoc.2024.02.019
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Oxidation behaviors of (Zr0.2Hf0.2Ta0.2Nb0.2Ti0.2)B2 high -entropy boride (HEB) ceramic and its composite containing 20 vol% SiC (HEB-20SiC) were studied at 1100-1400 degrees C in air for the first time. Compared with the HEB, the HEB-20SiC showed the significantly lower oxidation rate, the higher oxidation activation energy and the improved oxidation resistance, which could be attributed to the formation of stable and dense oxide scale containing SiO2. A layered oxidation structure was observed in the cross-section of HEB-20SiC, ascribing to the active oxidation, the generation of SiO and TiO gases, their subsequent outward diffusion and the re -oxidation at the surface.
引用
收藏
页码：5181 / 5189
页数：9
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