Influence of chromium diboride on the oxidation resistance of ZrB2-MoSi2 and ZrB2-SiC ceramics

被引：23

作者：

Grigoriev, O. ^{[1
]}

Neshpor, I ^{[1
]}

Vedel, D. ^{[1
]}

Mosina, T. ^{[1
]}

Silvestroni, L. ^{[2
]}

机构：

[1] NAS Ukraine, IPMS, Frantsevich Inst Problems Mat Sci, 3 Krzhizhanovskoho St, UA-03680 Kiev, Ukraine

[2] Inst Sci & Technol Ceram, Natl Res Council Italy, CNR ISTEC, Via Granarolo 64, I-48018 Faenza, Italy

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2021年 / 41卷 / 04期

关键词：

Ultra-high temperature ceramics; Zirconium boride; Hot pressing; Oxidation; CrB2;

D O I：

10.1016/j.jeurceramsoc.2020.12.036

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：

The effect of chromium diboride addition on the densification process and oxidation behavior of two ZrB2-MoSi2 and ZrB2-SiC baseline systems was studied. CrB2 was beneficial in lowering the sintering temperature owing to the tendency of its oxide to react with MoSi2 and SiC forming low-melting phases that helped the powder consolidation. Oxidation at 1500 degrees C induced the formation of further boron oxide as first consequence. In one case, when CrB2 was combined with MoSi2, an improved oxidation resistance was observed due to the stabilization of Cr-borides in the subscales saturated with B2O3. In the other case, when it was combined with SiC, the excessive low viscosity of the borosilicate glass facilitated the consumption of a thicker portion of materials as compared to the ZrB2-SiC reference.

引用

页码：2207 / 2214

页数：8

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