Failure tolerant functionally graded fiber-reinforced UHTCs exposed to hypersonic flows

被引：2
作者：
Silvestroni, Laura [1 ]
Savino, Raffaele [2 ]
Cecere, Anselmo [2 ]
Mungiguerra, Stefano [2 ]
机构：
[1] CNR, Inst Sci Technol & Sustainabil Ceram CNR ISSMC, Via Granarolo 64, I-48018 Faenza, Italy
[2] Univ Naples Federico II, Aerosp Div, Dep Ind Engn, P Tecchio 80, I-80125 Naples, Italy
来源：
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2024年 / 185卷
关键词：
UHTC; C fiber; Functionally graded composite; Microstructure; Arc-jet wind tunnel test; HIGH-TEMPERATURE CERAMICS; OXIDATION BEHAVIOR; COMPOSITES;
D O I：
10.1016/j.compositesa.2024.108293
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A functionally graded ZrB2 ceramic containing increasing content of short carbon fiber, 0-60 vol%, was tested in a supersonic arc-jet wind tunnel by exposure to flow in simulated air. The composite, that exhibited increased failure tolerance due to the combined toughening effect of the fiber bridging and the residual stresses accumulated between scales of different composition, successfully survived 2120 K for 300 sec, whereas scale spalling occurred upon reaching 2930 K. Overall, in both conditions, carbon fiber remained protected and with unchanged morphology, providing the necessary structural stability for surviving the shocks encountered by the hottest components of new generation aerospace vehicles.
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页数：14
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