碳纤维增韧超高温陶瓷具有氧化裂纹愈合能力的延展性Ni3B界面相

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-09-29 DOI:10.1016/j.jeurceramsoc.2025.117857

Xia Zhang, Mingyu Yao, Xiaoyi Jiang, Wenlong Li, Feilong Huang, Hongliang Xu, Hailong Wang, Hongxia Lu, Cheng Fang

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引用次数: 0

摘要

在碳纤维增强超高温陶瓷复合材料（Cf/UHTCs）中，韧性界面相起到了机械熔断器的作用，使基体裂纹发生偏转。本文介绍了一种具有低剪切模量（79 GPa）和高体积模量（236 GPa, G/B = 0.33）的韧性陶瓷Ni3B作为Cf/ZrB2-SiC复合材料的界面相。进一步设计了水热碳/Ni3B分层结构，以解决Ni3B涂层与碳纤维之间的热膨胀不匹配问题。与未改性的复合材料相比，优化后的复合材料的断裂韧性和抗弯强度分别提高了65% %和47% %。此外，Ni3B衍生的低密度氧化物可以在氧化条件下产生体积膨胀，密封界面微裂纹，并将临界热冲击温差从428℃提高到824℃。通过独特的耦合界面增韧和自愈功能，Ni3B有望成为未来Cf/UHTC复合材料的一种有前途的界面材料。

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Ductile Ni3B interphase with oxidation-induced crack healing capability for carbon fiber toughened ultra-high temperature ceramics

Ductile interphases serve as mechanical fuses to deflect matrix cracks in carbon fiber reinforced ultra-high temperature ceramic composites (C_f/UHTCs). This work introduces Ni₃B, a ductile ceramic with intrinsically low shear modulus (79 GPa) and high bulk modulus (236 GPa, G/B = 0.33), as the interphase in C_f/ZrB₂-SiC composites. A hydrothermal carbon/Ni₃B hierarchical architecture was further engineered to resolve thermal expansion mismatch between Ni₃B coating and carbon fibers. The optimized interface enhances fracture toughness and flexural strength by 65 % and 47 %, compared to the unmodified composites. In addition, Ni₃B derived low-density oxides could generate volume expansion under oxidative conditions, sealing interfacial microcracks and elevating critical thermal shock temperature difference from 428 ℃ to 824 ℃. By uniquely coupling interface toughening with self-healing functionality, Ni₃B is predicted to be a promising interphase material for future C_f/UHTC composites.

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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.