Ablation and heat insulation performances of nose-shaped ZrC-C composites with gradient pore structure

被引：35

作者：

Yan, Ningning ^{[1
]}

Fu, Qiangang ^{[1
]}

Tong, Mingde ^{[1
]}

Zhang, Jiaping ^{[1
]}

Sun, Jia ^{[1
]}

Shen, Qingliang ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Shaanxi Prov Key Lab Fiber Reinforced Light Compo, Xian 710072, Peoples R China

来源：

COMPOSITES PART B-ENGINEERING | 2021年 / 222卷

基金：

中国国家自然科学基金;

关键词：

ZrC-C composites; Gradient  pore ditribution; Ablation  performance; Heat  resistance capacity; CARBON/CARBON COMPOSITES; THERMAL-CONDUCTIVITY; PYROLYTIC CARBON; THERMOPHYSICAL PROPERTIES; TEMPERATURE ABLATION; RAMAN-SPECTROSCOPY; BEHAVIOR; FIBER; IMPROVEMENT; RESISTANCE;

D O I：

10.1016/j.compositesb.2021.109040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nose-shaped ZrC-C composites with gradient pore structure (ZrC-CGS) were successfully prepared by isothermal chemical vapor infiltration using ZrC skeleton as preform. Pyrolytic carbon with medium texture was deposited around ZrC skeleton. From the top to back, the porosity of the ZrC-CGS composites increased gradually from 0% to 62.9%. Compared with the ZrC-C composites with dense structure (ZrC-CDS), the mass ablation rate of the ZrCCGS composites decreased by 15.3% and the heat resistance capacity increased by 45.6%, and their coefficients of thermal expansion decreased obviously in the temperature range of 200-1500 degrees C. The simulation results showed that the residual thermal stress and back temperature of the ZrC-CGS composites are lower than those of the ZrCCDS composites. This work provides an effective strategy for designing and preparing ultra-high temperature composites having both ablation and heat insulation performances by controlling the pore structure and distribution.

引用

页数：12

共 46 条

[1] Ablation and thermal degradation behaviour of a composite based on resol type phenolic resin: Process modeling and experimental [J].