欢迎访问《空军工程大学学报》官方网站!

咨询热线:029-84786242 RSS EMAIL-ALERT
含LaPO4 界面相的氧化铝纤维增强陶瓷基透波复合材料的制备和性能研究
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

U416.216

基金项目:

国家重大科技专项(大型飞机专项)


Research on Preparation and Performance of Al2O3 Fiber Reinforced Ceramic Wave-Transparent Composite ContaiContaining LaPO4 Interface
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    氧化铝纤维增强陶瓷基复合材料具有力学性能好、高温抗氧化、耐腐蚀、介电性能优异等特点,可用做于天线罩耐高温透波功能材料。以氧化铝纤维为增强体,以氧化铝浆料、莫来石溶胶为基体,磷酸镧作为界面层材料,制备出了氧化铝纤维增强陶瓷基复合材料,并对复合材料在室温以及1 200℃的拉伸强度进行表征,同时通过扫描电镜观察其破坏规律。结果表明:引入LaPO4 界面相的复合材料,室温下的拉伸强度为148.3 MPa,1 200 ℃下的拉伸强度为129.6 MPa, 与无界面相复合材料拉伸强度相比分别提高了20.1%和24.9%。无界面相的氧化铝纤维增强陶瓷基复合材料断口平整,呈现脆性断裂,存在LaPO4 界面相的氧化铝纤维增强陶瓷基复合材料断口有大量纤维拔出,表现出韧性断裂特征。含有LaPO4 界面的复合材料在10 GHz、常温下介电常数均值为5.77,介电损耗为0.001 8。在1 300 ℃下材料的介电常数均值为6.18,介电损耗为0.002 0。相对于常温条件,介电常数和介电损耗的变化率分别为7.10%和11.1%,满足变化率小于15%的要求,有望用于透波复合材料领域。

    Abstract:

    Alumina fiber reinforced ceramic matrix composites are characterized by good mechanical properties, high temperature oxidation resistance, corrosion resistance and excellent dielectric properties. This material can be used as a kind of high temperature-resistant wave-transmitting functional material for radome. Taking Al2O3 and mullite slurry as basement, Al2O3 fiber as reinforcement, and LaPO4 as interface, Al2O3/Al2O3 composite is fabricated by repeating infiltration and high temperature treatment process. And then, the tensile strength of the composites at room temperature and 1 200 ℃ are measured, and the SEM is employed in observing the fracture microstructure. The tensile strength of Al2O3/Al2O3 composites with LaPO4 interface at room temperature is 148.3 MPa, and increment of tensile strength is 20.1% in comparison with Al2O3/Al2O3 composites without interface. The tensile strength of Al2O3/Al2O3 composites with LaPO4 interface at 1 200 ℃ is 129.6 MPa, and its increment is 24.9% in comparison with Al2O3/Al2O3 composites without LaPO4 interface. The SEM observation shows that the fracture surface of the composite without LaPO4 interface is smooth at crack, and brittle in fracture. A large number of fibers are pulled out in the fracture of alumina fiber reinforced ceramic matrix composites with LaPO4 interface phase, showing ductile fracture characteristics. The average dielectric constant of the composite material is 5.77 and the dielectric loss is 0.001 8 when the frequency is 10 GHz and RT; the average dielectric constant of the material at 1 300 ℃ is 6.18 with the dielectric loss is 0.002 0. The change rate of electric constant and dielectric loss is 7.10% and 11.1% respectively, meeting the needs of change rate <15%, and such a material is expected to be used in the field of wave-transparent composite materials.

    参考文献
    相似文献
    引证文献
引用本文

钟文丽, 刘一畅, 秦高磊, 马新洲, 叶冉冉, 张 剑, 吕 毅.含LaPO4 界面相的氧化铝纤维增强陶瓷基透波复合材料的制备和性能研究[J].空军工程大学学报,2024,25(3):28-35

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2024-05-30
  • 出版日期: