复合材料科学与工程Issue(1)：69-73,123,6.DOI:10.19936/j.cnki.2096-8000.20260128.010
氮化硅纤维增强氮化硼基复合材料制备及高温性能研究
Fabrication and high-temperature properties of silicon nitride fiber-reinforced boron nitride matrix composite
彭喆 1李娇娇 1袁志清 2李松1
作者信息
- 1. 先进无机纤维与复合材料国家重点实验室北京玻钢院复合材料有限公司,北京 102101
- 2. 石家庄海关技术中心,石家庄 050051
- 折叠
摘要
Abstract
Aiming at the application requirements of hypersonic vehicles for new high-temperature transparent composite materials,Si3N4f/BN composite was prepared by using PIP process with three-dimensional woven fabric of Si3N4f fiber satin weave as reinforcement and borazine as ceramic precursor.The structure and properties of Si3N4f/BN composite were characterized by SEM,XRD,high temperature bending and ablation.The results show that Si3N4f/BN composite appears uniform and dense texture and the density reaches 1.82 g/cm3.They have excellent high temper-ature mechanical properties with a flexural strength of 76.9 MPa at 1 400 ℃ and a strength retention rate exceeding 70％.At 1 400 ℃,the composite still maintains an amorph structure.Si3N4f/BN composite also exhibits excellent ablation resistance with a linear ablation rate of 0.026 mm/s for the test that adopted oxygen-acetylene ablation test in accordance with GJB 323A-1996.The surface of ablative area and the area along the direction of heat flow are emerged the ablation center area,the ablation transition area,and the non-ablated matrix area.In the ablation cen-ter,the fibers are consumed,leaving only a porous BN matrix and a small amount of oxides.In the ablation transi-tion area,the surface of the fiber is wrapped by molten oxides.The non-ablated area is still a dense Si3N4f/BN ma-trix.关键词
环硼氮烷/氮化硼/陶瓷基复合材料/高温性能/烧蚀Key words
borazine/boron nitride/ceramic-based composites/high-temperature properties/ablation分类
通用工业技术引用本文复制引用
彭喆,李娇娇,袁志清,李松..氮化硅纤维增强氮化硼基复合材料制备及高温性能研究[J].复合材料科学与工程,2026,(1):69-73,123,6.
