优化的Y2O3-Al2O3溶胶衍生的Cf/YAG复合材料，减少了制备周期，提高了力学性能

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-08-05 DOI:10.1016/j.coco.2025.102551

Guihang Deng, Qingsong Ma, Lei Guo, Weide Wang, Kuanhong Zeng, Jianbo Song

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引用次数: 0

摘要

溶胶渗透热处理（SIH）工艺是制备连续纤维增强钇铝石榴石（Y3Al5O12， YAG）复合材料的理想方法。然而，制备时间长和衍生复合材料的力学性能低一直是主要的挑战。以聚乙二醇为分散剂，合成了优化后的Y2O3-Al2O3溶胶，纳米级胶体颗粒混合均匀，分散性好。该溶胶具有较高的陶瓷产率和减轻高温下对C纤维的腐蚀作用的特点。通过显著减少制备周期得到的3DN Cf/YAG具有优异的力学性能，抗弯强度为218.9±8.6 MPa，断裂韧性为11.0±1.1 MPa m0.5，明显优于类似的溶胶衍生C纤维增强复合材料和典型的DSE YAG。优化Y2O3-Al2O3溶胶的研究进展为提高SIH路线的适用性和开发高性能yag基结构材料提供了根本性的推动。

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Optimized Y2O3-Al2O3 sol derived Cf/YAG composite with reduced preparation cycles and enhanced mechanical properties

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Optimized Y2O3-Al2O3 sol derived Cf/YAG composite with reduced preparation cycles and enhanced mechanical properties

The sol-infiltration-heat treatment (SIH) process represents an ideal approach for fabricating continuous fiber reinforced yttrium aluminum garnet (Y₃Al₅O₁₂, YAG) composites. However, the extended preparation period and the low mechanical properties of the derived composite have long been key challenges. An optimized Y₂O₃-Al₂O₃ sol was synthesized with PEG employed as the dispersant, and the nano-sized colloidal particles were uniformly mixed and highly dispersed. The sol was characterized by high ceramic yield and mitigated etching effect on C fibers at elevated temperatures. The 3DN C_f/YAG derived through significantly reduced preparation cycles exhibited superior mechanical properties with a flexural strength of 218.9 ± 8.6 MPa and a fracture toughness of 11.0 ± 1.1 MPa m^0.5, observably outperforming similar sol derived C fiber reinforced composites and typical DSE YAG. The advancement in optimized Y₂O₃-Al₂O₃ sol provided a fundamental boost for enhancing the applicability of the SIH route and developing high-performance YAG-based structural materials.

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.