The effects of ZrSi2 on the ablation and insulation performances of low-density carbon-phenolic composites
- Resource Type
- article
- Authors
- Yaxi Chen; Xuechen Huang; Feilong Wang; Qiming Jiao; Yuxin Fu
- Source
- Materials Research Express, Vol 11, Iss 4, p 045604 (2024)
- Subject
- low density C-Ph composite
ZrSi2
oxyacetylene flame
ablation performance
Materials of engineering and construction. Mechanics of materials
TA401-492
Chemical technology
TP1-1185
- Language
- English
- ISSN
- 2053-1591
Carbon-phenolic (C-Ph) composites are typical ablative thermal protection materials. Excellent ablation and insulation performance indicate a decreased thickness of the thermal shield. Thus, ZrSi _2 particles were introduced to improve the performance of the low-density C-Ph composite. An oxyacetylene flame torch was used to examine the ablation and insulating characteristics. The curing process of the matrix resin was not affected by ZrSi _2 . The thermal conductivities of the composites with different ZrSi _2 contents ranged from 0.219 ∼ 0.254 W K ^−1 ·m ^−1 . A continuous but not very compact cover was formed on the ablating surface of the C-Ph composite with 10% ZrSi _2 , which limited the escape of the charred matrix. The passageways for the gaseous products of the charring phenolic compounds were also not impeded by this cover. The C-Ph composite with 10% ZrSi _2 exhibited the lowest linear loss rate (0.0081 mm s ^−1 ) and the best heat insulating performance.