CVI和PIP工艺下SiCf/SiC原位显微组织力学性能及热损伤机理研究

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Materials Characterization Pub Date : 2025-02-01 Epub Date: 2024-12-25 DOI:10.1016/j.matchar.2024.114689

Lu Zhang, Hongjiao Lin, Zhongyuan Sun, Xiangyu Cai, Tao Feng, Zhixun Wen, Shouyi Sun

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引用次数: 0

摘要

比较了CVI工艺和CVI + PIP工艺制备的SiCf/SiC复合材料的原位显微组织力学性能。结果表明，氧化前和氧化后的纤维损伤程度分别为13.8%和21.9%。采用透射电镜对两种工艺的氧化厚度和元素分布进行了比较。结果表明，外氧表现为纵向渗透氧化，而PIP工艺将氧引入材料，使内氧横向扩散氧化过程。由于内外氧的共同作用，材料最终呈现出均匀氧化状态。

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Investigation of in-situ microstructural mechanical properties and thermal damage mechanisms of SiCf/SiC under CVI and PIP processes

This study compared the in-situ microstructural mechanical properties of SiC_f/SiC composites fabricated by CVI and CVI + PIP process. The investigation revealed that the degree of fiber damage caused by PIP process was 13.8 % before oxidation and 21.9 % after oxidation. TEM was employed to compare the oxidation thickness and element distribution of two processes. The results indicated that external oxygen exhibited longitudinal infiltration oxidation, whereas PIP process introduced oxygen into the material, causing the internal oxygen to diffuse the oxidation process horizontally. As a result of the joint action of internal and external oxygen, the material ultimately exhibited a uniformly oxidized state.

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.