Effects of ambient temperature on tensile properties of 2D SiC/SiC composites

被引：0
|
作者：
Du J. [1 ]
Yu G. [1 ]
Pang Y. [2 ]
Zhang H. [3 ]
Liang X. [4 ]
Gao X. [1 ]
Song Y. [1 ,5 ]
机构：
[1] Key Laboratory of Aero-Engine Thermal Environment and Structure, Ministry of Industry and Information Technology, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing
[2] AECC Sichuan Gas Turbine Establishment, Chengdu
[3] The Second Military Representative Office of Air Force Equipment Department in Chengdu, Chengdu
[4] AVIC Nanjing Engineering Institute of Aircraft Systems, Nanjing
[5] State Key Laboratory of Mechanics and Control Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2024年 / 45卷 / 01期
关键词：
2D SiC/SiC composites; Aeroengine; Ceramic matrix composites; Fracture morphology; Tensile properties;
D O I：
10.13675/j.cnki.tjjs.2209066
中图分类号：
学科分类号：
摘要：
In order to study the effects of temperature on the tensile properties of ceramic matrix composites，tensile tests of 2D SiC/SiC composites were carried out under inert gas environments at room temperature and high temperature of 800 ℃，1 000 ℃ and 1 200 ℃. The deformation data of the specimen under elevated temperature environment is collected using digital image correlation technology. The fracture morphology of the specimen was photographed by optical microscopy and scanning electron microscope. The results show that the tensile stress-strain response of the 2D SiC/SiC composites also has obvious bilinear characteristics in the range of 800 ℃ to 1 200 ℃. The elastic modulus of the initial linear segment at elevated temperature is similar to the room temperature test results，the elastic modulus of the second linear segment at elevated temperature is lower than that of the room temperature environment. The tensile strength of materials in the inert gas environment of 800~ 1 200 ℃ is about 20% lower than that of the room temperature environment. Temperature mainly affects the binding state of the fiber to the matrix in the material and the strength of the SiC fiber. On the one hand，the higher the temperature，the more serious the pull-out of the fractured fiber. On the other hand，the higher the temperature，the lower the strength of SiC fibers，and the strength of 2D SiC/SiC composites also decreases. © 2024 Journal of Propulsion Technology. All rights reserved.
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