复合界面层对SiCf/SiC复合材料力学损伤行为的影响

doi:10.15541/jim20230001

无机材料学报 ›› 2023, Vol. 38 ›› Issue (8): 917-922.DOI: 10.15541/jim20230001 CSTR: 32189.14.10.15541/jim20230001

复合界面层对SiC_f/SiC复合材料力学损伤行为的影响

沈轩逸¹^,²^,³(), 马沁²^,³, 薛玉冬²^,³, 廖春景²^,³, 朱敏¹, 张翔宇²^,³(), 杨金山²^,³(), 董绍明²^,³

1.上海理工大学材料与化学学院, 上海200093
2.中国科学院上海硅酸盐研究所, 高性能陶瓷和超微结构国家重点实验室, 上海 200050
3.中国科学院上海硅酸盐研究所, 结构陶瓷与复合材料工程研究中心, 上海 200050

收稿日期:2023-01-01 修回日期:2023-03-25 出版日期:2023-08-20 网络出版日期:2023-04-11
通讯作者: 杨金山, 研究员. E-mail: jyang@mail.sic.a.cn;
张翔宇, 研究员. E-mail: xyzhang@mail.sic.ac.cn
作者简介:沈轩逸(1997-), 男, 硕士研究生. E-mail: 203613023@st.usst.edu.cn
基金资助:
国家重点研发计划项目(2022YFB3707700);国家自然科学基金优秀青年科学基金项目(52222202);上海市“基础研究特区计划”(JCYJ-SHFY-2021-001);中国科学院轻型动力创新研究院创新引导基金项目面上基金(CXYJJ20- MS-02);中国科学院重点部署项目(ZDRW-CN-2021-2-2)

Effects of Multilayered Interfaces on Mechanical Damage of SiC_f/SiC Composites

SHEN Xuanyi¹^,²^,³(), MA Qin²^,³, XUE Yudong²^,³, LIAO Chunjin²^,³, ZHU Min¹, ZHANG Xiangyu²^,³(), YANG Jinshan²^,³(), DONG Shaoming²^,³

1. School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
2. State Key Laboratory of High-Performance Ceramics and Superﬁne Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
3. Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Received:2023-01-01 Revised:2023-03-25 Published:2023-08-20 Online:2023-04-11
Contact: YANG Jinshan, professor. E-mail: jyang@mail.sic.ac.cn;
ZHANG Xiangyu, professor. E-mail: xyzhang@mail.sic.ac.cn
About author:SHEN Xuanyi (1997-), male, Master candidate. E-mail: 203613023@st.usst.edu.cn
Supported by:
National Key R&D Program of China(2022YFB3707700);National Natural Science Foundation of China(52222202);Shanghai Pilot Program for Basic Research-Chinese Academy of Science, Shanghai Branch(JCYJ-SHFY-2021-001);Innovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences(CXYJJ20- MS-02);Key Research Program of the Chinese Academy of Sciences(ZDRW-CN-2021-2-2)

摘要/Abstract

摘要：

SiC_f/SiC陶瓷基复合材料在航空航天领域具有广阔的应用前景, 其界面层设计是研究重点。研究表明, 复合界面层可以有效提升陶瓷基复合材料的抗氧化性能, 但其对材料力学性能及损伤机制的影响尚不明确。本研究利用化学气相渗透法(CVI)制备得到具有BN及(BN/SiC)₃复合界面层的小复合材料, 探究了复合界面层对SiC_f/SiC复合材料失效机制的影响。基于两种力学加载实验结合声发射探测分析了两种界面层小复合材料的损伤过程。实验结果表明, 利用CVI制备的小复合材料界面结构清晰, 基体致密。两类小复合材料均具有SiC_f/SiC陶瓷基复合材料的典型力-位移曲线, 不同界面层小复合材料损伤过程具有不同的力声特征。通过两类力学加载试验的声发射特征能够有效分析小复合材料各阶段损伤发展情况。本实验中BN及(BN/SiC)₃复合界面层SiC_f/SiC小复合材料最大承受载荷分别为139和160 N, 复合界面层小复合材料中的多层界面具有更强的偏转裂纹能力, 降低裂纹延伸至纤维的速度, 进而提高材料的力学性能。

关键词: 复合界面层, 小复合材料, 单调拉伸, 损伤分析, 声发射

Abstract:

SiC_f/SiC ceramic matrix composites have excellent prospects in aeroengine applications. Importantly, the interface design becomes a research focus. Multilayered interfaces can effectively improve the oxidation resistance of ceramic matrix composites, while their effect on the mechanical properties and damage mechanism are still unclear. Here, SiC_f/SiC minicomposites with BN and (BN/SiC)₃ interfaces were fabricated via the chemical vapor infiltration (CVI) method. Then, effect of multilayered interfaces on the failure mechanism of SiC_f/SiC composites was evaluated. According to the two kinds of mechanical experiments and acoustic emission (AE) detection, the damage mechanism of minicomposites was analyzed. Results indicate that the minicomposites prepared by CVI have an obvious interface structure and a dense matrix. The maximum load of BN and (BN/SiC)₃ minicomposites was 139 and 160 N, respectively. Besides, the two types of minicomposites possess typical load-displacement curves, and the damage processes of composites with different interfacial coatings exhibit various load-acoustic characteristics correspondingly. The AE characteristics of two mechanical loading tests can effectively assess the damage evolution of the minicomposites at each stage. In conclusion, multilayered interfaces can deflect cracks better, delay cracks extending to fibers, and thus improving mechanical properties of SiC_f/SiC composites.

Key words: multilayered interfaces, minicomposite, monotonic tensile, damage analysis, acoustic emission

中图分类号:

TQ174

沈轩逸, 马沁, 薛玉冬, 廖春景, 朱敏, 张翔宇, 杨金山, 董绍明. 复合界面层对SiC_f/SiC复合材料力学损伤行为的影响[J]. 无机材料学报, 2023, 38(8): 917-922.

SHEN Xuanyi, MA Qin, XUE Yudong, LIAO Chunjin, ZHU Min, ZHANG Xiangyu, YANG Jinshan, DONG Shaoming. Effects of Multilayered Interfaces on Mechanical Damage of SiC_f/SiC Composites[J]. Journal of Inorganic Materials, 2023, 38(8): 917-922.

图/表 9

图1 小复合材料示意图

Fig. 1 Schematic diagram of minicomposites

表1 小复合材料基本参数

Table 1 Basic parameters of minicomposites

Sample	Density/ (g·cm^-3)	Porosity/%	Volume of fibre/%
C-1	2.55	11.3	33.29
C-2	2.71	9.8	31.32

图2 声发射系统示意图

Fig. 2 Schematic diagram of acoustic emission system

图3 小复合材料断口形貌图及其EDS分析

Fig. 3 Fracture morphologies and EDS analyses of minicomposites (a) C-1; (b) C-2,; (c) EDS of C-1; (d) EDS of C-2; Colorful figures are available on website

图4 小复合材料单调拉伸实验中的力学性能

Fig. 4 Mechanical properties of minicomposites during monotonic tensile test (a) C-1; (b) C-2

图5 小复合材料拉伸断口形貌

Fig. 5 Tensile fracture morphologies of minicomposites (a, b) C-1; (c, d) C-2

图6 小复合材料单调拉伸中的名义累积声发射事件数和能量以及单值声发射能量与载荷的关系

Fig. 6 Nominal cumulative AE event number and energy relationship between single-value AE energy and load in monotonic tensile of minicomposites (a) C-1; (b) C-2; Colorful figures are available on website

图7 小复合材料加/卸载实验中的力学性能

Fig. 7 Mechanical properties of minicomposites during loading/unloading tensile tests (a) C-1; (b) C-2

图8 BN及(BN/SiC)3界面层小复合材料加/卸载过程中的名义累积声发射事件数和能量以及单值声发射能量与载荷的关系

Fig. 8 Nominal cumulative AE event number and energy during loading/unloading of minicomposites with BN and (BN/SiC)3 interfacial coatings and relationship between single-value AE energy and load (a) C-1; (b) C-2; Colorful figures are available on website

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复合界面层对SiC_f/SiC复合材料力学损伤行为的影响

Effects of Multilayered Interfaces on Mechanical Damage of SiC_f/SiC Composites

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复合界面层对SiCf/SiC复合材料力学损伤行为的影响

Effects of Multilayered Interfaces on Mechanical Damage of SiCf/SiC Composites

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复合界面层对SiC_f/SiC复合材料力学损伤行为的影响

Effects of Multilayered Interfaces on Mechanical Damage of SiC_f/SiC Composites