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还原氧化石墨烯增强碳化硅复合材料的力学性能

Mechanical Properties of Silicon Carbide Composites Reinforced with Reduced Graphene Oxide.

作者信息

Broniszewski Kamil, Woźniak Jarosław, Cygan Tomasz, Moszczyńska Dorota, Olszyna Andrzej

机构信息

Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland.

出版信息

Materials (Basel). 2024 Jul 8;17(13):3370. doi: 10.3390/ma17133370.

DOI:10.3390/ma17133370
PMID:38998450
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11243189/
Abstract

This article presents research on the influence of reduced graphene oxide on the mechanical properties of silicon carbide matrix composites sintered with the use of the Spark Plasma Sintering method. The produced sinters were subjected to a three-point bending test. An increase in flexural strength was observed, which reaches a maximum value of 503.8 MPa for SiC-2 wt.% rGO composite in comparison to 323 MPa for the reference SiC sample. The hardness of composites decreases with the increase in rGO content down to 1475 HV10, which is correlated with density results. Measured fracture toughness values are burdened with a high standard deviation due to the presence of rGO agglomerates. The K reaches values in the range of 3.22-3.82 MPa*m. Three main mechanisms responsible for the increase in the fracture toughness of composites were identified: bridging, deflecting, and branching of cracks. Obtained results show that reduced graphene oxide can be used as a reinforcing phase to the SiC matrix, with an especially visible impact on flexural strength.

摘要

本文介绍了关于还原氧化石墨烯对采用放电等离子烧结法烧结的碳化硅基复合材料力学性能影响的研究。对所制备的烧结体进行了三点弯曲试验。观察到弯曲强度有所提高，与参考SiC样品的323MPa相比，SiC-2wt.%rGO复合材料的弯曲强度最大值达到503.8MPa。复合材料的硬度随着rGO含量的增加而降低，降至1475HV10，这与密度结果相关。由于存在rGO团聚体，测得的断裂韧性值具有较高的标准偏差。K值在3.22 - 3.82MPa·m范围内。确定了导致复合材料断裂韧性增加的三个主要机制：裂纹桥接、裂纹偏转和裂纹分支。所得结果表明，还原氧化石墨烯可作为SiC基体的增强相，对弯曲强度的影响尤为明显。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd02/11243189/914b2d68efdd/materials-17-03370-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd02/11243189/587e559fc7a5/materials-17-03370-g007.jpg
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本文引用的文献

1
Effect of Anisotropy of Reduced Graphene Oxide on Thermal and Electrical Properties in Silicon Carbide Matrix Composites.还原氧化石墨烯的各向异性对碳化硅基复合材料热性能和电性能的影响
Nanomaterials (Basel). 2024 Mar 21;14(6):555. doi: 10.3390/nano14060555.
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