Tensile Creep Behavior of Cansas-II SiCf/SiC Composites at High Temperatures

Kaikai JING; Haoyang GUAN; Siyu ZHU; Chao ZHANG; Yongsheng LIU; Bo WANG; Jing WANG; Mei LI; Chengyu ZHANG

doi:10.15541/jim20220441

Journals >Journal of Inorganic Materials >Volume 38 >Issue 2 >Page 177 > Article

Journal of Inorganic Materials
Vol. 38, Issue 2, 177 (2023)

Tensile Creep Behavior of Cansas-II SiC_f/SiC Composites at High Temperatures

Kaikai JING^*, Haoyang GUAN, Siyu ZHU, Chao ZHANG, Yongsheng LIU, Bo WANG, Jing WANG, Mei LI, and Chengyu ZHANG

DOI: 10.15541/jim20220441 Cite this Article

Kaikai JING, Haoyang GUAN, Siyu ZHU, Chao ZHANG, Yongsheng LIU, Bo WANG, Jing WANG, Mei LI, Chengyu ZHANG. Tensile Creep Behavior of Cansas-II SiC_f/SiC Composites at High Temperatures[J]. Journal of Inorganic Materials, 2023, 38(2): 177 Copy Citation Text

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. Dimensions and shape of tensile and tensile creep specimen (unit: mm)

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. Tensile creep curves of 2D-SiC_f/SiC at high temperatures

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. Tensile stress-strain curves of as-received and crept 2D-SiC_f/SiC

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$Macroscopic morphologies of fractures of 2D-SiCf/SiC under different conditions$

. Macroscopic morphologies of fractures of 2D-SiCf/SiC under different conditions

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$Morphologies of fracture oxidation zone of 2D-SiCf/SiC under different creep rupture conditions$

. Morphologies of fracture oxidation zone of 2D-SiC_f/SiC under different creep rupture conditions

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. Interface and fiber damage in 2D-SiC_f/SiC during creeping at 1300 ℃/100 MPa

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. Longitudinal fiber microstructures of 2D-SiC_f/SiC after crept

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. Larson-Miller plots for 2D-SiC_f/SiC

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Diameter/μm	Density/(g·cm^-3)	Tensile strength/GPa	Tensile modulus/GPa
14	2.74	2.7	270

Table 1. Basic properties of domestic second-generation Cansas-II silicon carbide fibers

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Temperature/℃	E/GPa	σ_PLS/MPa	σ_UTS/MPa	ε/%
RT	273	115	282	0.57
1200	259	110	249	0.74
1300	223	92	229	0.60

Table 2. Tensile properties of 2D-SiC_f/SiC composites

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Specimen	Tempera-ture/℃	Stress/MPa	Steady-state creep strain rate/s^-1	Creep rupture time/h	Creepstrain/%
2D-SiC_f/SiC	1200	100	1.86×10^-10	>560	0.20
	1200	110	4.95×10^-10	>560	0.23
	1200	120	2.16×10^-9	42	0.18
	1200	140	8.45×10^-7	0.1	0.21
	1300	90	5.62×10^-10	>500	0.28
	1300	100	1.73×10^-9	70	0.20
	1300	120	1.86×10^-8	6	0.28
	1400	80	1.32×10^-9	88	0.33
	1400	100	1.46×10^-8	1.6	0.57
CVI-SiC_f/SiC^[13]	1300	75	2.3×10^-9	111.1	—
	1300	90	6.2×10^-8	33.4	—
	1300	120	3.6×10^-7	0.83	—
	1300	150	3.0×10^-6	0.14	—
MI-SiC_f/SiC^[15]	1204	125	3.0×10^-11	>1000	0.25
	1204	140	2.3×10^-10	>1000	0.31
	1204	150	—	82.1	0.29

Table 3. Tensile creep properties of 2D-SiC_f/SiC composites in air at high temperatures

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		σ_UTS/MPa	E/GPa	σ_PLS/MPa	ε/%
As-received		282	273	115	0.57
Crept	1200 ℃/100 MPa	211	—	—	—
	1200 ℃/110 MPa	173	209	89	0.25
	1300 ℃/90 MPa	138	157	55	0.17

Table 4. Residual tensile properties of 2D-SiC_f/SiC after creeping

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