Preparation, microstructure and properties of C/Ta4HfC5-SiC composite fabricated by PIP method based on a new liquid precursor

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-02-13 DOI:10.1016/j.jeurceramsoc.2025.117281

Fan Wan , Haolin Ma , Lin Zhang , Maofen He , Yurong Chen , Xuemei Li , Changqing Song , Junsheng Li

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引用次数: 0

Abstract

A novel liquid Ta₄HfC₅ precursor was produced by modified citric acid complexation method and C/Ta₄HfC₅-SiC composite was manufactured by precursor impregnation and pyrolysis (PIP) process. The powder obtained after 1800 ℃ heat treatment of the precursor has a diameter range of 50–300 nm, with a median diameter of ∼110 nm. The density and porosity of C/Ta₄HfC₅-SiC composite are 2.43 g/cm³ and 13.2 %, respectively. Due to the toughening of fibers and the addition of SiC, the overall integrity of C/Ta₄HfC₅-SiC is improved, achieving high bending strength and fracture toughness of 392.6 MPa and 10.4 MPa·m^1/2, respectively. After oxyacetylene ablation assessment of 60 s, the measured mass ablation rate and linear ablation rate of the composite were 11.6 mg/s and 9.1 µm/s, respectively. A complete oxide layer based on the joint effort of oxides of Ta(Hf) and Si was formed on the surface of the composite, with no exposed fibers observed.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.