[1]杨晨曦,曹伟,黄宝庆,等.高温介质下SiCf/SiC复合材料微观结构演变与力学行为研究[J].中国材料进展,2025,44(02):146-153.[doi:10.7502/j.issn.1674-3962.202412005]
　YANG Chenxi,CAO Wei,HUANG Baoqing,et al.Microstructure Evolution and Mechanical Behavior Study of SiCf/SiC Composite Materials under High Temperature Media[J].MATERIALS CHINA,2025,44(02):146-153.[doi:10.7502/j.issn.1674-3962.202412005]
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高温介质下SiCf/SiC复合材料微观结构演变与力学行为研究()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
44
期数:
2025年02
页码:
146-153
栏目:
出版日期:
2025-02-28

文章信息/Info

Title:
Microstructure Evolution and Mechanical Behavior Study of SiCf/SiC Composite Materials under High Temperature Media
文章编号:
1674-3962(2025)02-0146-08
作者:
杨晨曦; 曹伟; 黄宝庆; 原红星; 胡江波; 廉铁江; 王明珠
中国航发动力股份有限公司，陕西 西安 710003
Author(s):
YANG Chenxi;  CAO Wei;  HUANG Baoqing;  YUAN Hongxing;  HU Jiangbo;  LIAN Tiejiang;  WANG Mingzhu
AECC Aviation Power Co., Ltd., Xi’an 710003, China
关键词:
SiCf/SiC复合材料;  微观结构;  高温;  氩气介质;  空气氧化介质;  拉伸性能
Keywords:
SiCf/SiC composite materials;  microstructure;  high temperature;  argon media;  air media;  tensile properties
分类号:
V254.2
DOI:
10.7502/j.issn.1674-3962.202412005
文献标志码:
A
摘要:
对具有PyC/(SiC)4多层界面相的SiCf/SiC复合材料在1050和1350 ℃氩气介质和空气氧化介质中分别进行0.25，1，4和16 h热处理，分析不同高温介质环境下SiCf/SiC复合材料微观结构演变及与力学性能的关系。结果表明：高温氩气介质下暴露后的复合材料微观结构无变化，而随着热处理时间与温度的增加，由于纤维和基体受到热损伤，导致材料的拉伸强度呈下降趋势，但仍保持韧性特征。在高温空气氧化介质下，经高温短时氧化后，复合材料中的PyC界面被氧化消耗，在纤维与SiC界面相之间形成环形孔隙；经高温长时间氧化后，环形孔隙将被SiO2填充。上述微观结构的变化使SiCf/SiC复合材料拉伸断口形貌呈现3种类型，即含有PyC界面的复合材料具有适中的纤维拔出长度，无PyC界面的复合材料具有较长的纤维拔出长度，以及形成SiO2层的复合材料无纤维拔出。经高温空气氧化介质处理后的SiCf/SiC复合材料拉伸强度整体低于经氩气介质热处理后的，主要原因是纤维与基体受到氧化损伤，同时SiO2在界面生成，使得材料失去韧性。
Abstract:
In this study, SiCf/SiC composite materials with PyC/(SiC)4 multilayer interfacial phase were subjected to thermal treatments at 1050 and 1350 ℃ in argon and air media for durations of 0.25, 1, 4 and 16 h. The microstructural evolution and the relationship with mechanical properties after different high-temperature media thermal treatments were analyzed. The results showed that there was no change in the microstructure of the composite material after exposure to high-temperature argon media. However, with the increasing in treatment time and temperature, the tensile strength of the material decreased due to thermal damage of the fibers and matrix, while the composite still maintained the toughness characteristics. In the air media, after short-term oxidation at high temperatures, oxidation loss occurred at the PyC interface of the composite material, resulting in annular voids between fibers and SiC interfacial phases. After long-term oxidation at high temperatures, these annular voids were filled with SiO2. These changes in microstructure resulted in three main tensile fracture morphologies for SiCf/SiC composites: materials contained PyC interfaces had moderate fiber pull-out lengths, materials without PyC interfaces had longer fiber pull-out lengths, while materials with a layer of SiO2 had no fiber pull-out observed. The overall tensile strength of SiCf/SiC composites treated in high-temperature air media was lower than that treated with argon media, mainly due to oxidative damage to fibers and matrix and loss of toughness caused by formation of SiO2 at interfaces.

备注/Memo

备注/Memo:
收稿日期：2024-12-09修回日期：2025-01-13 第一作者：杨晨曦，男，1987年生，工程师， Email: yangcxyoung@126.com
更新日期/Last Update: 2025-01-21