Three-dimensional PDC-SiBCN network in MA-SiBCN ceramics: Toughening-reinforcing effect and oxidation barrier

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

Journal of The European Ceramic Society Pub Date : 2024-11-05 DOI:10.1016/j.jeurceramsoc.2024.117053

Zi-bo Niu , Daxin Li , Dechang Jia , Zhihua Yang , Kunpeng Lin , Yan Wang , Paolo Colombo , Ralf Riedel , Yu Zhou

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引用次数: 0

Abstract

A three-dimensional (3D) precursor-derived (PDC) SiBCN network was incorporated into mechanical alloying-derived (MA) SiBCN (MA@PDC-SiBCN) ceramic through a novel hybrid organic-inorganic method, enhancing densification while providing significant reinforcement and toughening effects. The PDC-SiBCN network's submicron continuity and uniformity enable efficient load transfer between under-sintered MA-SiBCN particles, increasing strength by 130 %, compared to MA-SiBCN ceramics of the same density. Additionally, as cracks penetrate the PDC-SiBCN network, crack tip deflection and bifurcation result in 57 % and 352 % increases in fracture toughness respectively, compared to fully sintered and under-sintered MA-SiBCN ceramics of the same density. Besides, due to synergistic oxidation characteristics, the three-dimensional PDC-SiBCN network acts as an oxidation barrier, inhibiting the heterogeneous oxidation of the encapsulated MA-SiBCN component, especially limiting the consumption of BN(C) phase at lower temperatures. The residual PDC-SiBCN network in the oxide layer serves as a rigid framework, preventing bubble growth in the molten oxide layer thereby forming a dense protective oxide layer.

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MA-SiBCN 陶瓷中的三维 PDC-SiBCN 网络：增韧强化效果和氧化阻隔性

通过一种新型有机-无机混合方法，在机械合金化（MA）SiBCN（MA@PDC-SiBCN）陶瓷中加入了三维（3D）前体衍生（PDC）SiBCN网络，在提高致密性的同时还提供了显著的增强和增韧效果。PDC-SiBCN 网络的亚微米级连续性和均匀性使烧结不足的 MA-SiBCN 颗粒之间能够有效传递载荷，与相同密度的 MA-SiBCN 陶瓷相比，强度提高了 130%。此外，当裂纹穿透 PDC-SiBCN 网络时，与完全烧结和烧结不足的相同密度 MA-SiBCN 陶瓷相比，裂纹尖端偏转和分叉导致断裂韧性分别提高了 57% 和 352%。此外，由于协同氧化特性，三维 PDC-SiBCN 网络起到了氧化屏障的作用，抑制了封装 MA-SiBCN 成分的异相氧化，特别是限制了 BN(C)相在较低温度下的消耗。氧化层中残留的 PDC-SiBCN 网络起着刚性框架的作用，可防止气泡在熔融氧化层中生长，从而形成致密的保护氧化层。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.