<trans-title>Creep Properties and Damage Mechanisms of 2D-SiC<sub>f</sub>/SiC Composites Prepared by CVI</trans-title>

Xi WANG; Kejie WANG; Hui BAI; Zhuolin SONG; Bo WANG; Chengyu ZHANG

doi:10.15541/jim20190450

Journal of Inorganic Materials, Volume. 35, Issue 7, 817(2020)

Creep Properties and Damage Mechanisms of 2D-SiC_f/SiC Composites Prepared by CVI

Xi WANG1...2, Kejie WANG1, Hui BAI1, Zhuolin SONG1,2, Bo WANG3, and Chengyu ZHANG12,* |Show fewer author(s)

¹Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern polytechnical University, Xi’an 710072, China

²NPU-SAS Joint Research Center, Northwestern Polytechnical University, Xi’an 710072, China

³School of Aeronautics, Northwestern polytechnical University, Xi’an 710072, China

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Figures & Tables(11)

1. Shape and dimensions for creep specimen of 2D-SiC_f/ SiC composites

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2. Creep curves at 1200 ℃ under different stresses for 2D-SiC_f/SiC composites

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3. Fracture morphologies of 2D-SiC_f/SiC composites at different creep conditions

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4. Crack image of creep specimen at 1200 ℃/100 MPa

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5. Relationship between steady state creep strain rate and stress σ, temperature T

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6. TEM images of as-received 2D-SiC_f/SiC composite

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7. HRTEM and SAED images of SiC fiber in crept 2D-SiC_f/SiC composites

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8. Grain size distributions of SiC fibers in 2D-SiC_f/SiC composites at different creep conditions

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Table 1. Properties of the SiC fiber
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Table 1. Properties of the SiC fiber
Diameter/μm Density/(g∙cm^-3) Tensile strength/GPa Tensile modulus/GPa
14 2.74 2.7 270

Table 2. Properties of the SiC_f/SiC composite
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Table 2. Properties of the SiC_f/SiC composite
Density/(g∙cm^-3) Tensile strength/MPa Tensile modulus/GPa Porosity/%
2.5 225 220 ~23

Table 3. Creep properties of 2D-SiC_f/SiC composites

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Table 3. Creep properties of 2D-SiC_f/SiC composites

Temperature/℃	Stress/MPa	Rupture time/h	Steady-state creep strain rate/s^-1
1200	100	216.0	6.1´10^-9
1200	120	89.0	2.2´10^-8
1200	140	50.0	4.5´10^-8
1300	100	121.0	4.4´10^-8
1300	120	53.0	4.9´10^-8
1300	140	22.0	2.0´10^-7
1400	100	8.6	1.5´10^-6

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Xi WANG, Kejie WANG, Hui BAI, Zhuolin SONG, Bo WANG, Chengyu ZHANG. Creep Properties and Damage Mechanisms of 2D-SiC_f/SiC Composites Prepared by CVI[J]. Journal of Inorganic Materials, 2020, 35(7): 817

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