Preparation and Properties of High-performance Needled C/C Composites

Yufeng LIU; Xiang FENG; Jinming WANG; Zhenghui XU; Tongqi LI; Xingjian JIAO; Yalei WANG; Xiang XIONG

doi:10.15541/jim20190607

Journals >Journal of Inorganic Materials >Volume 35 >Issue 10 >Page 1105 > Article

Journal of Inorganic Materials
Vol. 35, Issue 10, 1105 (2020)

Preparation and Properties of High-performance Needled C/C Composites

Yufeng LIU^1、2, Xiang FENG¹, Jinming WANG¹, Zhenghui XU¹, Tongqi LI¹, Xingjian JIAO¹, Yalei WANG², and Xiang XIONG²

Author Affiliations

¹Science and Technology of Advanced Functional Composites Laboratory, Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China;

²Powder Metallurgy Research Institute, Central South University, Changsha 410083, China

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DOI: 10.15541/jim20190607 Cite this Article

Yufeng LIU, Xiang FENG, Jinming WANG, Zhenghui XU, Tongqi LI, Xingjian JIAO, Yalei WANG, Xiang XIONG. Preparation and Properties of High-performance Needled C/C Composites[J]. Journal of Inorganic Materials, 2020, 35(10): 1105 Copy Citation Text

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1. Schematic diagram of needling depth

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2. Microstructure of prepreg in needled C/C

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3. Tensile load-strain behavior of needle C/C samples

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4. Fracture surface micro-morphologies of needle C/C composites

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5. Fracture surface micro-morphologies of needle C/C composites after tensile tests

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6. Thermal expansion coefficients of three composites

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7. Thermal conductivity of four composites with different needling densities

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8. Effect of heat treatment on thermal conductivity

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No.	ρ_A-fiber web/(g·m^-2)	ρ_A-weftless ply/(g·m^-2)	Needling depth/mm	Needling density/(pin·m^-2)	ρ_preform/(g·cm^-3)	ρ_C/C/(g·cm^-3)	Porosity/%
A	200	300	12	22	0.31	2.073	0.677
B-1	140	340	12	12	0.45	2.052	0.528
B-2	140	340	12	22	0.44	2.047	0.680
B-3	140	340	12	27	0.44	2.052	0.681
B-4	140	340	12	35	0.45	2.048	0.570
B-5	140	340	15	12	0.44	2.042	0.622
B-6	140	340	18	12	0.44	2.040	2.361
B-7	120	300	12	22	0.46	2.040	1.643
B-8	140	340	12	22	0.45	2.048	1.416
C	80	380	12	22	0.6	2.016	1.127

Table 1. Parameters of needled C/C composites

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No.	ρ_{A-fiber web}/ρ_{A-weftless ply}	ρ_preform/(g·cm^-3)	XY tensile strength/MPa	Z tensile strength/MPa
A	1.0 : 1.5	0.31	17.5	0.062
B-8	1.0 : 2.4	0.44	22.0	0.060
C	1.0 : 4.8	0.60	32.9	0.055

Table 2. Mechanical performance of three needled preform

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No.	Tensile		In-plane compression		Flexural		In-plane shear		Interlaminar shear strength/MPa
No.	Strength/MPa	Modulus/GPa	Strength/MPa	Modulus/GPa	Strength/MPa	Modulus/GPa	Strength/MPa	Modulus/GPa	Interlaminar shear strength/MPa
A	116.0	44.85	173.1	37.76	181.5	34.56	67.9	11.08	24.6
B-1	165.5	59.22	221.5	56.14	255.8	43.14	62.7	10.97	23.3
B-2	151.1	57.06	201.8	51.97	249.5	40.21	58.9	10.39	24.0
B-3	165.0	55.34	205.2	53.02	239.1	43.36	58.9	10.68	25.0
B-4	160.9	52.41	198.0	52.18	226.9	42.45	58.2	10.73	25.5
B-5	150.5	56.61	198.9	49.48	211.4	39.49	59.3	10.10	24.0
B-6	120.4	40.99	196.4	44.72	185.1	35.36	54.7	9.93	34.6
B-7	154.0	50.94	219.2	53.41	214.4	39.02	60.6	10.10	29.6
B-8	154.2	51.00	200.2	54.89	221.0	40.72	60.7	10.13	26.0
C	207.4	68.59	228.6	68.97	285.1	52.84	54.1	10.06	28.3

Table 3. Mechanical properties of needled C/C composites

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