High-temperature failure characteristics of phenolic-quartz hybrid fabrics reinforced benzoxazine composites
CSTR:
Author:
Affiliation:

(1. Institute of Environmental and Operational Medicine, Tianjin 300050, China;2. College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China)

Clc Number:

TB332

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    P-Q/BZ(Phenolic-quartz hybrid fabrics reinforced benzoxazine resin composites) were manufactured by compression molding. The flexural properties, ablative properties, resistance to flow erosion and failure characteristics of the P-Q/BZ specimens were investigated. The applicability of P-Q/BZ in high temperature environment was studied. Results showed that, the average flexural strength, flexural modulus and ILSS (interlaminar shear stress) of virginal P-Q/BZ specimens were 283 MPa, 10.8 GPa and 22.6 MPa, respectively. After 300 ℃ thermal treatment in N2 atmospheres:the thickness of P-Q/BZ specimens were increased by about 22%, and the flexural strength, flexural modulus and ILSS of P-Q/BZ specimens were decreased by about 58%, 41% and 58%, respectively. After the oxyacetylene flame test, the average mass loss rate and the linear ablative rate of P-Q/BZ specimens were 0.048 4 g/s and -0.081 mm/s, respectively. No delamination of the P-Q/BZ composites were observed but the microstructure of the char layer delaminated severely, the carbonaceous residue blocks which were produced by the phenolic fiber and the resin matrix were attached badly to the quartz fibers. The resistance to heat-flow erosion of the P-Q/BZ specimen was significantly affected, and the mass loss of the P-Q/BZ composite was about 59% after the exhaust plume ablative test with a small liquid motor. Pyrolysis expansion problem of the P-Q/BZ composites is in need of a solution and the resistance to heat-flow erosion of this composites is in demand of improvement as well.

    Reference
    Related
    Cited by
Get Citation
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:November 29,2018
  • Revised:
  • Adopted:
  • Online: July 06,2020
  • Published:
Article QR Code