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反应熔渗C/C-SiC-ZrC复合材料的界面特征及其力学性能

丁家鑫 陈招科 王铎 熊翔

丁家鑫, 陈招科, 王铎, 等. 反应熔渗C/C-SiC-ZrC复合材料的界面特征及其力学性能[J]. 复合材料学报, 2024, 42(0): 1-12.
引用本文: 丁家鑫, 陈招科, 王铎, 等. 反应熔渗C/C-SiC-ZrC复合材料的界面特征及其力学性能[J]. 复合材料学报, 2024, 42(0): 1-12.
DING Jiaxin, CHEN Zhaoke, WANG Duo, et al. Interface characteristics and mechanical properties of reactive melt infiltrated C/C-SiC-ZrC matrix composites[J]. Acta Materiae Compositae Sinica.
Citation: DING Jiaxin, CHEN Zhaoke, WANG Duo, et al. Interface characteristics and mechanical properties of reactive melt infiltrated C/C-SiC-ZrC matrix composites[J]. Acta Materiae Compositae Sinica.

反应熔渗C/C-SiC-ZrC复合材料的界面特征及其力学性能

基金项目: 总装重点实验室基金(No.6142907200301);国家自然科学基金面上项目(No.52072410)
详细信息
    通讯作者:

    陈招科,研究员,博士,研究方向为耐烧蚀高熵陶瓷、多元超高温陶瓷及其改性复合材料 E-mail: chenzhaoke2008@csu.edu.cn

  • 中图分类号: TB332

Interface characteristics and mechanical properties of reactive melt infiltrated C/C-SiC-ZrC matrix composites

Funds: Fund of Key Laboratory of Final Assembly (No.6142907200301); General Program of National Natural Science Foundation of China (No.52072410).
  • 摘要: C/C-ZrC-SiC复合材料作为一种极具前景的热防护材料,在航空航天领域均有广泛应用。但是反应熔渗法(Reactive melt infiltration,RMI)制备的C/C-ZrC-SiC复合材料却存在力学性能偏低的缺点,成为制约其发展应用的主要因素。为了改善 C/C- SiC-ZrC 基复合材料的纤维损伤和力学性能,通过化学气相沉积(Chemical vapor deposition, CVD)在碳纤维针刺坯体中引入了300 nm厚的热解碳(Pyrolysis carbon,PyC)界面、300 nm厚的PyC/SiC双层界面和100 nm、300 nm、800 nm厚的(PyC+SiC)共沉积界面,再采用RMI制备出C/C-SiC-ZrC复合材料。采用XRD、SEM、EPMA和TEM等分析手段研究了C/C-SiC-ZrC复合材料的物相、微观形貌、元素分布以及RMI后C/C-SiC-ZrC复合材料的界面损伤情况,并利用三点弯曲试验评估了RMI后试样的弯曲性能。结果表明:界面的引入不仅起到了对纤维的保护作用,同时也改善了纤维和基体间的结合状态,极大的避免了反应熔渗对碳纤维的侵蚀;PyC界面对纤维的保护作用有限,而PyC/SiC双层界面的保护作用最好;界面类型和界面厚度对复合材料力学性能产生重要影响,当界面厚度相同时,含(PyC+SiC)共沉积界面复合材料和含PyC/SiC双层界面复合材料的抗弯强度分别为162.80 MPa和208.58 MPa,均优于含PyC界面的复合材料;随(PyC+SiC)共沉积界面厚度的增大,复合材料的力学性能呈现先上升后下降的趋势。

     

  • 图  1  含不同界面低密度C/C坯体微观形貌及X射线衍射

    (a)(d)PyC界面;(b)(e) 300 nm共沉积界面;(c)(f)PyC/SiC双层界面;(g)100 nm共沉积界面;(i)800 nm共沉积界面; (h) C/C坯体X射线衍射

    Figure  1.  Microstructures and X-ray diffraction of low-density C/C preforms with different interfaces (a)(d) PyC interface; (b)(e) 300 nm codeposition interface; (c)(f) PyC/SiC double-layer interface; (g)100 nm codeposition interface; (i)800 nm codeposition interface; (h) C/C body X-ray diffraction

    图  2  含不同界面C/C-SiC-ZrC复合材料X射线衍射结果

    Figure  2.  X-ray diffraction results of C/C-SiC-ZrC composites with different interfaces

    图  3  含不同界面C/C-SiC-ZrC复合材料低倍数SEM图像

    (a) 热解碳(PyC)界面; (b) 100 nm(PyC+SiC)共沉积界面; (c) 300 nm(PyC+SiC)共沉积界面; (d) 800 nm(PyC+SiC)共沉积界面;(e) PyC/SiC双层界面

    Figure  3.  Low magnification SEM images of C/C-SiC-ZrC composites with different interfaces

    (a) Pyrolysis carbon (PyC) interface; (b) 100 nm(PyC+SiC) co-deposition interface; (c) 300 nm(PyC+SiC) co-deposition interface; (d) 800 nm(PyC+SiC) codeposition interface; (e) PyC/SiC double-layer interface

    图  4  含PyC/SiC双层界面的C/C-SiC-ZrC复合材料内部微观结构及EDS分析

    (a) 低倍数SEM图像; (b) 高倍数SEM图像; (c) (d) (e) EDS元素分析

    Figure  4.  EDS analysis of internal microstructure and elemental composition of C/C-SiC-ZrC composites with PyC/SiC double-layer interface

    (a) low-magnification SEM images; (b) high-magnification SEM images; (c) (d) (e) EDS elemental analysis

    图  5  含不同界面复合材料高倍数SEM图像

    (a) (b) (c) PyC界面; (d) (e) (f) (PyC+SiC)共沉积界面; (g) (h) (i) PyC/SiC双层界面

    Figure  5.  High-magnification SEM images of composites with different interfaces

    (a) (b) (c) PyC interface; (d) (e) (f) (PyC+SiC) codeposition interface; (g) (h) (i) PyC/SiC double-layer interface

    图  6  熔渗后不同界面处元素分布线扫图

    (a) (d) PyC界面; (b) (e) (PyC+SiC)共沉积界面; (c) (f) PyC/SiC双层界面

    Figure  6.  Line scan of element distribution at different interfaces after infiltration

    (a) (d) PyC interface; (b) (e) (PyC+SiC) codeposition interface; (c) (f) PyC/SiC double-layer interface

    图  7  不同界面纤维与陶瓷相分界面及残余界面TEM图像

    (a)(d) PyC界面; (b) (e) (PyC+SiC)共沉积界面; (c) (f) PyC/SiC双层界面

    Figure  7.  TEM images of the interface and residual interface between fibers and ceramic phases at different interfaces

    (a)(d) PyC interface; (b) (e) (PyC+SiC) codeposition interface; (c) (f) PyC/SiC double-layer interface

    图  8  不同界面处陶瓷相分布情况

    (a) PyC界面; (b) (PyC+SiC)共沉积界面;(c) PyC/SiC双层界面

    Figure  8.  Distribution of ceramic phases at different interfaces

    (a) PyC interface; (b) (PyC+SiC) codeposition interface; (c) PyC/SiC double-layer interface

    图  9  含不同界面复合材料弯曲载荷-弯曲位移曲线

    Figure  9.  Bending load-bending displacement curves of composites with different interfaces

    图  10  含不同界面复合材料抗弯强度测试断口形貌

    (a) (d) PyC界面; (b) (e) (PyC+SiC)共沉积界面; (c) (f) PyC/SiC双层界面

    Figure  10.  Fracture morphology of flexural strength test of composites with different interface composites

    (a) (d) PyC interface; (b) (e) (PyC+SiC) codeposition interface; (c) (f) PyC/SiC double-layer interface

    图  11  含不同厚度(PyC+SiC)共沉积界面复合材料的抗弯曲线

    Figure  11.  Bending resistance lines of (PyC+SiC) co-deposited interfaces composites with different thicknesses

    图  12  含100 nm、800 nm (PyC+SiC)共沉积界面复合材料的抗弯断口形貌(a) (b) 100 nm; (c) (d) 800 nm

    Figure  12.  Bending fracture of composites with 100 nm and 800 nm (PyC+SiC) co-deposited interfaces (a) (b) 100 nm; (c) (d) 800 nm

    表  1  含不同类型、不同厚度界面的低密度碳纤维坯体的性能特征

    Table  1.   Parameters of low-density carbon fiber preforms with different type and thickness of interfaces

    Sample Type of interface Thickness of interface/nm Density/(g·cm−3) Porosity/%
    P PyC 300 1.29 28.6
    PS100 (PyC+SiC) co-deposition 100 1.31 29.3
    PS300 300 1.40 24.1
    PS800 800 1.39 26.3
    PC PyC/SiC 300/300 1.31 28.4
    下载: 导出CSV

    表  2  含不同厚度(PyC+SiC)共沉积界面复合材料抗弯性能

    Table  2.   Mechanical properties of co-deposited interface composites with different thicknesses

    SampleType of interfaceThiceness of interface/nmFlexural strength/MPa
    PS100(PyC+SiC) co-deposition100139.68
    PS300300162.80
    PS800800128.95
    下载: 导出CSV
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  • 收稿日期:  2023-12-14
  • 修回日期:  2024-01-23
  • 录用日期:  2024-02-21
  • 网络出版日期:  2024-03-21

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