Cf /(CrZrHfNbTa)C-SiC high-entropy ceramic matrix composites for potential multi-functional applications

被引：16

作者：

Hu, Yang ^{[1
,2
,3
]}

Ni, Dewei ^{[1
,2
,4
]}

Chen, Bowen ^{[1
,2
]}

Cai, Feiyan ^{[1
,2
,3
]}

Zou, Xuegang ^{[1
,2
,3
]}

Zhang, Fan ^{[1
,2
,3
]}

Ding, Yusheng ^{[1
,2
]}

Zhang, Xiangyu ^{[1
,2
]}

Dong, Shaoming ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine M, Shanghai 200050, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, Struct Ceram & Composites Engn Res Ctr, Shanghai 200050, Peoples R China

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

[4] Univ Chinese Acad Sci, Hangzhou Inst Adv Study, Hangzhou, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2024年 / 182卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

High-entropy ceramic matrix composites; Mechanical property; Electromagnetic shielding; Ablation resistance; INTERFERENCE SHIELDING PROPERTIES; PRECURSOR INFILTRATION; ABLATION BEHAVIOR; CARBIDE; PERFORMANCE; FABRICATION; EFFICIENCY;

D O I：

10.1016/j.jmst.2023.09.043

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, Cf/(CrZrHfNbTa)C-SiC high-entropy ceramic matrix composites with good load-bearing, electromagnetic shielding and ablation resistance were designed and reported for the first time. The composites were fabricated by an efficient combined processing of slurry infiltration lamination (SIL) and precursor infiltration and pyrolysis (PIP). Density and porosity of the as-fabricated composites are 2.72 g/cm3 and 12.44 vol.%, respectively, and the flexural strength is 185 +/- 13 MPa. Due to the carbon fiber reinforcement with high conductivity and strong reflection, and high-entropy (CrZrHfNbTa)C ceramic matrix with strong absorbability, the total Electromagnetic interference shielding efficiency (SET) of the composites with a thickness of 3 mm are as high as 88.2 dB and 90 dB respectively in X-band and Ku-band. This means that higher than 99.999999 % electromagnetic shielding is achieved at 8-18 GHz, showing excel-lent electromagnetic shielding performance. The Cf/(CrZrHfNbTa)C-SiC composites also present excellent ablation resistance, with the linear and mass ablation rates of 0.9 mu m/s and 1.82 mg/s after ablation at the heat flux of 5 MW/m2 for 300 s ( similar to 2450 degrees C). This work opens a new insight for the synergistic de -sign of structural and functional integrated materials with load-bearing, electromagnetic shielding and ablation resistance, etc.(c) 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：132 / 140

页数：9