In-situ measurements of fracture toughness and microstructure characterization of C/SiC composites at elevated temperatures in air

被引：0
作者：
Chen W. [1 ]
Wang L. [1 ]
Zhang H. [1 ]
Li G. [2 ]
Chi P. [1 ]
Ma J. [3 ]
机构：
[1] Science and Technology on Space Physics Laboratory, China Academy of Launch Vehicle Technology, Beijing
[2] School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin
[3] Capital Aerospace Machinery Limited Company, Beijing
来源：
Baozha Yu Chongji/Explosion and Shock Waves | 2021年 / 41卷 / 04期
关键词：
C/SiC composites; Elevated temperature in air; Fracture toughness; In-situ measurements; Microstructure;
D O I：
10.11883/bzycj-2020-0104
中图分类号：
学科分类号：
摘要：
To study the fracture toughness and microstructure of C/SiC composites at elevated temperature in air, the fracture toughness of C/SiC composites at elevated temperature in air was in-situ measured by SENB (single edge notch beam) under TPB (three point bending) method. The fracture and failure mechanism of the composites at different temperatures were analyzed by SEM (scanning electron microscope) and XRD (X-ray diffraction). The results show that with the increase of temperature, the fracture toughness of C/SiC composites decreases, and the fracture mode gradually changes from brittle fracture to plastic fracture. The fracture toughness of C/SiC composites decreases from 12.504 MPa·m1/2 to 10.958 MPa·m1/2 with a reduction of 12% from room temperature to 1 000 ℃. The material exhibits a good high-temperature fracture toughness. Under different temperatures, the material exhibits different modes of fracture morphology. At the normal temperature, the fracture morphology can mainly show the phenomenon of fiber pull-out. With the increase of temperature, the phenomenon basically disappears, the fracture cross section becomes flatter, and the strength of the material mainly depends on the strength of the substrate. © 2021, Editorial Staff of EXPLOSION AND SHOCK WAVES. All right reserved.
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  • [1] MA Q S, LIU H T, PAN Y, Et al., Research progress on the application of C/SiC composites in scram jet, Journal of Inorganic Materials, 28, 3, pp. 247-255, (2014)
  • [2] LIU W, CHEN Z H, WANG S., Progress of actively cooled ceramic matrix composites applied in advanced propulsion systems, Material Engineering, 11, pp. 92-96, (2012)
  • [3] ZHANG L T, CHENG L F, XU Y D., Progress in re-search work of new CMC-SiC, Aeronautical Manufacturing Technology, 1, pp. 24-32, (2003)
  • [4] QIN S Y, YAN L SH, CUI H, Et al., Application and development of Cf/SiC ceramic matrix composites in aerospace, Materials Review, 21, pp. 239-240, (2007)
  • [5] IMUTA M, GOTON J., Development of high temperature materials including CMCs for space application, Key Engineering Material, 164, pp. 439-444, (1999)
  • [6] CHEN X, LI Y, SHI C, Et al., The dynamic tensile properties of 2D-C/SiC composites at elevated temperatures, International Journal of Impact Engineering, 79, 5, pp. 75-82, (2015)
  • [7] XU Y, SHAO B B, XU W W, Et al., Dynamic splitting tensile test of short carbon fiber C/SiC ceramic matrix composites, Explosion and Shock Waves, 37, 2, pp. 315-322, (2017)
  • [8] CHEN X, CHEN L, CHEN W, Et al., Quai-static and dynamic tensile mechanical properties of two dimensional C/SiC composites, Acta Materiae Compositae Sinica, 33, 12, pp. 2846-2853, (2016)
  • [9] WANG H L, ZHANG C Y, LIU Y S, Et al., Temperature dependency of interlaminar shear strength of 2D C/SiC composites, Materials & Design, 36, 4, pp. 172-176, (2012)
  • [10] JIANG J, LI K Y, FAN S W, Et al., The effects of heat treatment of C/C porous substance on microstructure and mechanical property of C/SiC composites, Materials Reports B, 27, 1, pp. 86-88, (2013)
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