Synthesis of multifunctional foam-like isotropic high volume fraction SiC nanowires preform via a simple method

Chuchu Guo, Laifei Cheng, Fang Ye

科研成果: 期刊稿件文章同行评审

16 引用 (Scopus)

摘要

Lightweight, pure, foam-like and macro-structured ceramic nanowires preform with a certain structural strength and good electromagnetic functional performance can be used as the skeleton of new isotropic ceramic matrix composites (CMCs) to improve its comprehensive performance. With this aim, silicon carbide (SiC) nanomaterials are promising candidates. However, little is studied at present regarding pure SiC nanowires as the preform for structural and functional CMCs. In this study, an isotropic SiC nanowire preform with a cross-linked structure among the nanowires was designed and prepared via an in-situ synthesis method, based on the carbon template. As prepared SiC nanowires with high purity can spontaneously and uniformly distribute in three dimensions. Furthermore, the crystallinity, and volume fraction of the nanowires preform can be flexibly adjusted. SiC nanowires preform has a low-density (0.1 g cm−3) and rigid structure, which can be attributed to high-volume fraction (26.05%) of nanowires and the crossing and connection among nanowires. Importantly, owing to its unique structure, the maximum stress of the SiC nanowires preform reaches 34 KPa. The prepared SiC nanowire preform achieved full absorption in the X-band, and the specific microwave absorption performance exceeded 45.18 dB cm−2 g−1. The preform exhibits also excellent thermal stability and thermal insulation performance. These make it a particularly promising preform of CMCs combining structure and functional performance.

源语言英语
页(从-至)9569-9577
页数9
期刊Ceramics International
47
7
DOI
出版状态已出版 - 1 4月 2021

指纹

探究 'Synthesis of multifunctional foam-like isotropic high volume fraction SiC nanowires preform via a simple method' 的科研主题。它们共同构成独一无二的指纹。

引用此