High temperature oxidation behavior and mechanism of SiC-TaB2 composites

被引：4

作者：

Lv, Haozhong ^{[1
,2
]}

Ge, Min ^{[1
,2
]}

Zhang, Hao ^{[1
,2
]}

Zhang, Huifeng ^{[1
,3
,4
]}

Sun, Xiaoming ^{[1
,3
]}

Yu, Shouquan ^{[1
,3
]}

Zhang, Weigang ^{[1
,2
,3
,4
]}

机构：

[1] Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341119, Peoples R China

[4] Univ Sci & Technol China, Hefei 230026, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 931卷

关键词：

SiC; TaB2; Non-isothermal oxidation; Isothermal oxidation; SILICON-CARBIDE; ABLATION BEHAVIOR; PARTICLE-SIZE; RESISTANCE; CERAMICS; AIR; DESIGN; TAB2; CMCS;

D O I：

10.1016/j.jallcom.2022.167500

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In order to improve the oxidation resistance of SiC in its ceramic matrix composites (CMCs), monolithic SiC ceramics doped with various proportions of TaB2 were prepared, isothermal and non-isothermal oxidation was investigated in detail as well. It was found that even a small proportion addition of TaB2 can effectively alleviate the intense oxidation of SiC between 1200 degrees C to 1600 degrees C, i.e., an oxidation degree of SiC can be reduced by 37% in the case with 10 wt% TaB2 under non-isothermal oxidation from room temperature to 1600 degrees C. The oxidation resistance mechanism was also studied via analyzing the composition and micro-structure of the formed oxide layer, it was found that the transformation of Ta2O5 in the multiphase oxide layer from grainy to flaky shape at about 1500 degrees C plays the most important role in the excellent high temperature oxidation resistance of composites.(c) 2022 Published by Elsevier B.V.

引用

页数：10

共 34 条

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