Preparation of ZrB2-ZrC-SiC-ZrO2 nanopowders with in-situ grown homogeneously dispersed SiC nanowires
Preparation of ZrB2-ZrC-SiC-ZrO2 nanopowders with in-situ grown homogeneously dispersed SiC nanowires
复制标题
原位生长均匀分散SiC纳米线制备ZrB2-ZrC-SiC-ZrO2纳米粉体
DOI：
10.1016/j.matdes.2020.109186
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发表时间：
2020-11-01
影响因子：
8.4
通讯作者：
Hou, Xianghui
中科院分区：
文献类型：
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作者：
Liu, Changqing;Zhang, Luyue;Hou, Xianghui
为了探索SiC纳米线（SiCnws）在ZrB2基陶瓷材料中的应用，报道了一种简便的方法，通过热解浸渍在聚氨酯海绵中的含B-Si-Zr溶胶前体，在ZrB2-ZrC-SiC-ZrO2纳米粉末中原位合成均匀分散的SiCnws。海绵用于为碳化硅纳米线的生长提供多孔骨架，并促进它们在粉末中的均匀分布。将Si/Zr原子比为10的前驱体在1500℃下热处理2h后，得到粒径接近100 nm的均匀细小的ZrB2-ZrC-SiC-ZrO2陶瓷粉末。通过增加前驱体中的硅含量，SiCnw的直径约为100 nm，长度可控，范围为数十至数百微米。此外，所生产的SiCnws纯度高，并且均匀地分散在杂化纳米粉末中。该研究为克服SiCnws增强陶瓷基复合材料的关键制造工艺开辟了一条可行的途径。 (C) 2020 作者。由爱思唯尔有限公司出版
To explore the application of SiC nanowires (SiCnws) in ZrB2 based ceramic materials, a facile approach is reported to in situ synthesize homogeneously dispersed SiCnws in ZrB2-ZrC-SiC-ZrO2 nanopowders by pyrolyzing a B-Si-Zr containing sol precursor impregnated in polyurethane sponge. The sponge was used to provide porous skeletons for the growth of SiC nanowires and facilitate their uniform distribution in the powders. After heattreatment of the precursor with a Si/Zr atomic ratio of 10 at 1500 degrees C for 2 h, ZrB2-ZrC-SiC-ZrO2 ceramic powders were obtained with an even and fine particle size of similar to 100 nm. The SiCnws were in a diameter of similar to 100 nm with a controllable length varying from tens to hundreds of microns by increasing the silicon content in the precursor. Moreover, the produced SiCnws were in high purity, and homogeneously dispersed in the hybrid nanopowders. The study can open up a feasible route to overcome the critical fabrication process in SiCnws reinforced ceramic matrix composites. (C) 2020 The Authors. Published by Elsevier Ltd.