氩气气氛热处理对Shicolon-II SiC纤维机械性能和微观结构演变的影响

doi:10.15541/jim20250052

无机材料学报 ›› 2026, Vol. 41 ›› Issue (1): 119-128.DOI: 10.15541/jim20250052 CSTR: 32189.14.10.15541/jim20250052

氩气气氛热处理对Shicolon-II SiC纤维机械性能和微观结构演变的影响

袁旺¹^,²^,³(), 胡建宝¹^,²(), 周亮¹^,²^,³, 阚艳梅¹^,², 张翔宇¹^,², 董绍明¹^,²()

1.中国科学院上海硅酸盐研究所, 关键陶瓷材料全国重点实验室, 上海 200050
2.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
3.中国科学院大学, 北京 100039

收稿日期:2025-02-12 修回日期:2025-04-02 出版日期:2026-01-20 网络出版日期:2025-04-09
通讯作者: 胡建宝, 研究员. E-mail: hujianbao@mail.sic.ac.cn;
董绍明, 研究员. E-mail: smdong@mail.sic.ac.cn
作者简介:袁旺(2001-), 男, 博士研究生. E-mail: yuanwang22@mails.ucas.ac.cn

Effect of Argon Atmosphere Heat Treatment on Mechanical Properties and Microstructural Evolution of Shicolon-II SiC Fibers

YUAN Wang¹^,²^,³(), HU Jianbao¹^,²(), ZHOU Liang¹^,²^,³, KAN Yanmei¹^,², ZHANG Xiangyu¹^,², DONG Shaoming¹^,²()

1. State Key Laboratory of High Performance Ceramics, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
2. Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
3. University of Chinese Academy of Sciences, Beijing 100039, China

Received:2025-02-12 Revised:2025-04-02 Published:2026-01-20 Online:2025-04-09
Contact: HU Jianbao, professor. E-mail: hujianbao@mail.sic.ac.cn;
DONG Shaoming, professor. E-mail: smdong@mail.sic.ac.cn
About author:YUAN Wang (2001-), male, PhD candidate. E-mail: yuanwang22@mails.ucas.ac.cn
Supported by:
National Natural Science Foundation of China(52172108);National Key R&D Program of China(2022YFB3707700);Strategic Priority Research Program of the Chinese Academy of Sciences(XDC0144005)

摘要/Abstract

摘要：

碳化硅纤维因其优异的力学性能和高温特性, 成为陶瓷基复合材料的理想增强材料。由于不同型号纤维在组分和制备工艺上的差异，有必要进行单独研究。本研究系统探讨了Shicolon-II纤维在1300~1700 ℃氩气热处理条件下力学性能、表面微观结构和成分的演变规律。Shicolon-II纤维由小尺寸的β-SiC晶粒、SiC_xO_y非晶相及少量石墨微晶组成。经1300 ℃氩气气氛处理后，纤维的单丝拉伸强度保持在3.620 GPa(保留率为98.32%), 而经1500 ℃氩气气氛处理后, 强度下降至2.875 GPa(保留率为78.08%)。纤维力学性能下降可归因于非晶相的分解和β-SiC晶粒的生长。抗蠕变性能是复合材料长期性能的关键因素。在1400 ℃以上温度处理, 由于β-SiC晶粒生长, 纤维的高温抗蠕变性能显著增强。这项研究为第二代纤维的高温应用提供了有价值的理论依据。

关键词: Shicolon-II SiC纤维, 热处理, 力学性能, 微观结构

Abstract:

Silicon carbide fibers are considered ideal reinforcing materials for ceramic matrix composites due to their excellent mechanical properties and high-temperature performance. Different types of fibers necessitate individual investigation due to variations in their composition and fabrication processes. This study presents a comprehensive investigation into evolution of the mechanical properties, surface microstructure, and composition of Shicolon-II fibers subjected to argon heat treatment at temperatures ranging from 1300 ℃ to 1700 ℃. The Shicolon-II fibers are composed of small-sized β-SiC grains, SiC_xO_y amorphous phase, and a minor amount of graphite microcrystals. Following treatment in an argon atmosphere at 1300 ℃, the fibers maintain a monofilament tensile strength of 3.620 GPa, corresponding to a retention of 98.32%. This strength diminishes to 2.875 GPa, equating to a retention of 78.08%, after treatment at 1500 ℃. The reduction in mechanical properties of the fibers can be ascribed to the decomposition of the amorphous phase and the growth of β-SiC grains. Furthermore, creep resistance is an essential factor influencing the long-term performance of composite materials. After treatment at temperatures above 1400 ℃, the high-temperature creep resistance of the fibers is significantly enhanced due to growth of β-SiC grains. This study offers valuable theoretical insights into high-temperature applications of second-generation fibers, contributing to an enhanced understanding of their performance under extreme conditions.

Key words: Shicolon-II SiC fiber, heat treatment, mechanical property, microstructure

中图分类号:

TQ343

袁旺, 胡建宝, 周亮, 阚艳梅, 张翔宇, 董绍明. 氩气气氛热处理对Shicolon-II SiC纤维机械性能和微观结构演变的影响[J]. 无机材料学报, 2026, 41(1): 119-128.

YUAN Wang, HU Jianbao, ZHOU Liang, KAN Yanmei, ZHANG Xiangyu, DONG Shaoming. Effect of Argon Atmosphere Heat Treatment on Mechanical Properties and Microstructural Evolution of Shicolon-II SiC Fibers[J]. Journal of Inorganic Materials, 2026, 41(1): 119-128.

图/表 11

Table 1 Relevant parameters of Shincolon-II SiC fibers

Fiber	Diameter/μm	C/Si	Oxygen/% (in atom)	Young's modulus/GPa	Average tensile strength/GPa
Shincolon-II	8.1±1.0	1.46	1.4	326.6	3.682

Fig. 1 Average monofilament tensile strengths (a) and Weibull plots (b) of the fibers

Fig. 2 Fiber wrapping schematic (a) and bend stress relaxation results of fibers (b)

Fig. 3 (a) Stress relaxation ratio of heat-treated fibers at different test temperature; (b) β-SiC grain size and 1400 ℃ BSR results of different heat-treated fibers

Fig. 4 TEM and HRTEM images of as-received fiber (a, b), fiber after heat treatment at 1500 ℃ (c, d), and corresponding SAED images (insets in (a, c))

Fig. 5 XRD patterns of Shicolon-II SiC fibers after argon treatment at different temperatures (a) and size of β-SiC crystallites versus heat treatment temperature (b)

Fig. 6 Morphologies of Shicolon-II SiC fibers after heat treatment at different temperatures

Fig. 7 Cross-sectional morphologies of Shicolon-II SiC fibers after heat treatment at different temperatures

Fig. 8 Full and fine XPS spectra of Shicolon-II SiC fibers (a, b) As-received fiber; (c, d) Fiber after heat treatment at 1500 ℃

Fig. 9 AES results of Shicolon-II SiC fibers (a) As-received fiber; (b) Fiber after heat treatment at 1400 ℃

Fig. 10 Raman spectra of heat-treated fibers (a) and ID/IG values after heat treatment at different temperatures (b)

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氩气气氛热处理对Shicolon-II SiC纤维机械性能和微观结构演变的影响

Effect of Argon Atmosphere Heat Treatment on Mechanical Properties and Microstructural Evolution of Shicolon-II SiC Fibers

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