Study on Ablation Behavior and Mechanism of Cf/Hfcpip-Siccvi Composites: From Sio2 Nanowires Film to Hfo2 Skeleton Structure

Feng, Tao; Hou, Wanbo; Meng, Xiangyuan; Shi, Xinhao; Mu, Tong; Li, Hejun; Hui, Lin

doi:10.2139/ssrn.4207624

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“…Figure a shows the XRD patterns of two different char layers before and after ZB modification. Two broad peaks appearing at 2θ angles of 9.42 and 21.96° were attributed to SiO 2 (PDF 51-1377, 51-1379), respectively, which provides a barrier to outside gases. , Three sharp peaks observed at 2θ angles of about 35.43, 59.86, and 71.71° are the characteristic peaks of SiC (PDF #29-1129). It is speculated that SiC is produced in situ by siloxane ceramization or a carbothermal reaction, which contributes to high temperature and ablation resistance of the composites. , Besides, the characteristic peak observed at 27.75° was attributed to B 2 O 3 (PDF 06-0297), which can be presumed to be a decomposition product of ZB.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Two broad peaks appearing at 2θ angles of 9.42 and 21.96°were attributed to SiO 2 (PDF 51-1377, 51-1379), respectively, which provides a barrier to outside gases. 60,61 Three sharp peaks observed at 2θ angles of about 35.43, 59.86, and 71.71°are the characteristic peaks of SiC (PDF #29-1129). It is speculated that SiC is produced in situ by siloxane ceramization or a carbothermal reaction, which contributes to high temperature and ablation resistance of the composites.…”

Section: Synergistic Mechanism Of Ablation-resistant Reinforced and I...mentioning

confidence: 99%

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Flexible Thermal Protection Polymeric Materials with Self-Sensing and Self-Adaptation Deformation Abilities

Chi

Cai

Yan

et al. 2023

ACS Appl. Mater. Interfaces

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Based on the strategy of killing two birds with one stone, we introduce thermally expandable microspheres into a silicone rubber matrix to fabricate temperature-responsive controllable deformation materials, which exhibit intelligent deformation properties as well as enhanced thermal protection performance, for dynamic thermal protection in the next-generation morphing aircrafts. The formation of hollow structures endows the material with intelligent thermal management ability and makes the thermal conductivity controllable, meeting the requirements of rapid deformation and excellent thermal insulation. The dimensions of the material adaptively expand with increasing temperature, and a constant 50N force can be provided to ensure reliable sealing. Moreover, benefiting from the synergistic effect of the hollow structure and zinc borate in the ceramization process of the silicone rubber, the 10 mm thick material can reduce the temperature from 2000 to 63 °C, and the mass ablation rate is only 4.8 mg/s. To broaden the application of our material, a sensor with a sandwich structure composed of different functional layers is designed. It is pleasantly surprising to observe that the sensor can provide real-time remote warning of fire and overheating sites with a response time as short as 1 s. This synergistic strategy opens a new possibility to fabricate intelligent thermal protection materials.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Synergistic Mechanism Of Ablation-resistant Reinforced and I...mentioning

confidence: 99%

Flexible Thermal Protection Polymeric Materials with Self-Sensing and Self-Adaptation Deformation Abilities

Chi

Cai

Yan

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

Study on Ablation Behavior and Mechanism of Cf/Hfcpip-Siccvi Composites: From Sio2 Nanowires Film to Hfo2 Skeleton Structure

Cited by 1 publication

References 0 publications

Flexible Thermal Protection Polymeric Materials with Self-Sensing and Self-Adaptation Deformation Abilities

Flexible Thermal Protection Polymeric Materials with Self-Sensing and Self-Adaptation Deformation Abilities

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