Tufting缝合C/C复合材料制备与力学性能

刘苏骅; 严钰轩; 嵇阿琳; 肖春

Tufting缝合C/C复合材料制备与力学性能

刘苏骅^{1, 2, ,},
严钰轩^{1, 3},
嵇阿琳^{1, 3},
肖春^{1, 2}

1.
西安航天复合材料研究所, 西安 710025
2.
高性能碳纤维制造及应用国家地方联合工程中心, 西安 710089
3.
陕西省航天复合材料重点实验室, 西安 710025

详细信息

通讯作者:
刘苏骅，硕士，工程师，研究方向为C/C复合材料　E-mail: 455560625@qq.com

中图分类号: TB332
计量
- 文章访问数: 62
- HTML全文浏览量: 17
- 被引次数: 0
出版历程
- 收稿日期: 2024-06-05
- 修回日期: 2024-07-14
- 录用日期: 2024-07-22
- 网络出版日期: 2024-08-13

Preparation and mechanical properties of tufting C/C composites

LIU Suhua^{1, 2
, ,},
Yan Yuxuan^{1, 3},
JI Alin^{1, 3},
XIAO Chun^{1, 2}

1.
XI’AN Aerospace Composites Institute, Xi’an 710025, China
2.
National and Local Union Engineering Research Center of High-performance Carbon Fiber Manufacture and Application, Xi’an 710089, China
3.
Shaanxi Key Laboratory of Aerospace Composites, Xi’an 710025, China

摘要

摘要: 采用Tufting缝合机器人研制碳纤维缝合预制体，通过改变预制体结构与致密化方式，制备具有不同结构的缝合C/C复合材料，探讨基体类型、网胎引入、针刺工艺等对缝合C/C复合材料力学性能的影响规律，并探讨力学性能影响机理。结果表明：在完全相同的预制体结构条件下，采用化学气相沉积工艺致密的缝合C/C拉伸模量和拉伸强度更高，采用化学气相沉积+糠酮树脂浸渍碳化工艺制备的缝合C/C具有更加优异的层间剪切性能与弯曲性能。在完全相同的复合致密条件下，网胎层的加入对于提高C/C复合材料弯曲、剪切性能有积极的作用，逐层针刺+缝合C/C复合材料强度性能优于缝合C/C复合材料，但因针刺工艺的引入削弱了缝合C/C复合材料的“假塑形”变形能力。
- 缝合 /
- C/C /
- 复合材料 /
- 预制体结构 /
- 力学性能
Abstract: Using Tufting robot, carbon fiber tufted perform was developed. By changing the parameters of tufting and needle punching processes, tufted C/C composites with different structures and a combination of tufting and needle punching C/C composites were prepared. The effects of parameters such as matrix type, mesh felt and needle punching process on the mechanical properties of tufted C/C composites were studied, and the mechanism for the influence of preform structure on the mechanical properties of C/C composites were explored. The results showed that the addition of mesh layer or resin carbon matrix had a positive effect on improving the bending and shear performance of C/C composites. The strength performance of needle punched and tufted C/C composites was better than that of tufted C/C composites, but the introduction of needle punching technology weakened the “pseudo plastic” deformation of stitched C/C composites.
- Tufting /
- C/C /
- Composite /
- Preform structure /
- Mechanical performance

HTML全文

图 1 法国Novoltex^® C/C扩张段

Figure 1. Novoltex® C/C extension in France

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图 2 KSL研制的RS522 Tufting缝合机

Figure 2. RS522 Tufting robot developed by KSL

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图 3 Tufting缝合原理示意图

Figure 3. Schematic Diagram of Tufting principle

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图 4 缝合C/C的CVI制备工艺流程

Figure 4. CVI preparation process of tufted C/C

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图 5 缝合C/C的CVI+PIP制备工艺流程

Figure 5. CVI +PIP preparation process of tufted C/C

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图 6 缝合预制体宏观形貌

Figure 6. Macroscopic morphology of tufted preform

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图 7 缝合预制体截面形貌

Figure 7. Section morphology of tufted preform

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图 8 A-C/C与B-C/C孔径分布

Figure 8. Pore diameter distribution of A-C/C and B-C/C

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图 9 A-C/C与B-C/C拉伸试样断口形貌

Figure 9. Tensile specimen fracture morphology of A-C/C and B-C/C

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图 10 B-C/C树脂碳分布

Figure 10. Resin carbon distribution of B-C/C

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图 11 A-C/C与B-C/C宏观裂纹形貌

Figure 11. Crack morphology of A-C/C and B-C/C

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图 12 C-C/C拉伸断口形貌

Figure 12. Tensile specimen fracture morphology of C-C/C

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图 13 针刺纤维形貌

Figure 13. Morphology of punching fiber

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图 14 D-C/C与E-C/C拉伸试样断口形貌

Figure 14. Tensile specimen fracture morphology of D-C/C and E-C/C

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图 15 A-C/C与D-C/C弯曲应力-应变曲线

Figure 15. Bending stress-strain curve of A-C/C and D-C/C

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图 16 D-C/C宏观裂纹形貌

Figure 16. Crack morphology of D-C/C

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表 1 缝合预制体结构类型

Table 1. Structure of tufted preforms

Number	Forming method of preforms	Layup type
A	Laying up + integral tufting	Non-woven carbon fabrics + Carbon fiber mesh felts
B	Laying up + integral tufting	Non-woven carbon fabrics + Carbon fiber mesh felts
C	Laying up + integral tufting	Non-woven carbon fabrics
D	Laying up + Layer by layer needling+ integral tufting	Non-woven carbon fabrics + Carbon fiber mesh felts
E	Laying up + Cycle by Cycle needling + integral tufting	Non-woven carbon fabrics + Carbon fiber mesh felts

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表 2 缝合C/C复合材料密度

Table 2. Density of tufted preforms

Number	Density of preforms g·cm⁻³	Density of composite g·cm⁻³	Preparation method
A	0.578	1.55	CVI
B	0.578	1.56	CVI+PIP
C	0.792	1.58	CVI
D	0.653	1.58	CVI
E	0.575	1.57	CVI

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表 3 缝合预制体纤维体积含量

Table 3. Fiber volume content of tufted preforms

Number	Fiber volume fraction	Fiber volume content of mesh felt	Z-direction fiber content	XY-direction fiber content	Density of preforms g·cm^-3
A	32.11%	4.23%	1.23%	26.66%	0.578
B	32.11%	4.23%	1.23%	26.66%	0.578
C	44%	0	1.23%	42.77%	0.792
D	36.28%	4.77%	1.23%	30.27%	0.653
E	31.94%	4.20%	1.23%	26.51%	0.575

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表 4 A-C/C与B-C/C力学性能对比

Table 4. Comparison of mechanical properties between A-C/C and B-C/C

Number	Tensile modulus/GPa	Tensile strength/MPa	Flexural modulus/GPa	Flexural strength/MPa	Shear strength/MPa
A-C/C	42.73	82.40	17.57	95.53	9.95
B-C/C	35.41	71.38	19.75	125.67	12.09

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表 5 C-C/C力学性能

Table 5. Mechanical properties of C-C/C

Number	Tensile modulus/GPa	Tensile strength/MPa	Flexural modulus/GPa	Flexural strength/MPa	Shear strength/MPa
C-C/C	37.35	95.50	7.75	43.14	5.39

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表 6 D-C/C与E-C/C力学性能

Table 6. Mechanical properties of D-C/C and E-C/C

Number	Tensile modulus/GPa	Tensile strength/MPa	Flexural modulus/GPa	Flexural strength/MPa	Shear strength/MPa
D-C/C	32.60	91.34	13.70	114.55	16.82
E-C/C	35.26	80.13	20.80	102.63	9.37

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