High-temperature oxidation behavior of C/C composites in wet oxygen: Experiment and first-principle calculations

Pengfei Zhang; Yulei Zhang; Tiyuan Wang; Guohui Chen; Wenhan Gai

doi:10.1016/j.corsci.2021.109577

High-temperature oxidation behavior of C/C composites in wet oxygen: Experiment and first-principle calculations

Pengfei Zhang
, Yulei Zhang
, Tiyuan Wang
, Guohui Chen
, Wenhan Gai

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

The oxidation behaviors of carbon/carbon composites prepared by chemical vapor infiltration method in wet oxygen were investigated by experiments and first-principle calculations. The results showed that the graphite components in mixed structure were easily destroyed and transformed into amorphous carbon in wet oxygen, accelerating the weight loss of C/C composites. The reason was ascribed to that hydroxyl radicals promoted the surface and inward diffusion of O atoms by uneven distribution of charges and formation of an exothermic reaction. Besides, the H transfer as a feasible way could result in the gather of epoxy radicals, increasing the risk of cracking.

Original language	English
Article number	109577
Journal	Corrosion Science
Volume	189
DOIs	https://doi.org/10.1016/j.corsci.2021.109577
State	Published - 15 Aug 2021
Externally published	Yes

Keywords

Carbon/carbon composites
First principle
H transfer
O diffusion
OH radical
Wet oxygen

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10.1016/j.corsci.2021.109577

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title = "High-temperature oxidation behavior of C/C composites in wet oxygen: Experiment and first-principle calculations",

abstract = "The oxidation behaviors of carbon/carbon composites prepared by chemical vapor infiltration method in wet oxygen were investigated by experiments and first-principle calculations. The results showed that the graphite components in mixed structure were easily destroyed and transformed into amorphous carbon in wet oxygen, accelerating the weight loss of C/C composites. The reason was ascribed to that hydroxyl radicals promoted the surface and inward diffusion of O atoms by uneven distribution of charges and formation of an exothermic reaction. Besides, the H transfer as a feasible way could result in the gather of epoxy radicals, increasing the risk of cracking.",

keywords = "Carbon/carbon composites, First principle, H transfer, O diffusion, OH radical, Wet oxygen",

author = "Pengfei Zhang and Yulei Zhang and Tiyuan Wang and Guohui Chen and Wenhan Gai",

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year = "2021",

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day = "15",

doi = "10.1016/j.corsci.2021.109577",

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T1 - High-temperature oxidation behavior of C/C composites in wet oxygen

T2 - Experiment and first-principle calculations

AU - Zhang, Pengfei

AU - Zhang, Yulei

AU - Wang, Tiyuan

AU - Chen, Guohui

AU - Gai, Wenhan

PY - 2021/8/15

Y1 - 2021/8/15

N2 - The oxidation behaviors of carbon/carbon composites prepared by chemical vapor infiltration method in wet oxygen were investigated by experiments and first-principle calculations. The results showed that the graphite components in mixed structure were easily destroyed and transformed into amorphous carbon in wet oxygen, accelerating the weight loss of C/C composites. The reason was ascribed to that hydroxyl radicals promoted the surface and inward diffusion of O atoms by uneven distribution of charges and formation of an exothermic reaction. Besides, the H transfer as a feasible way could result in the gather of epoxy radicals, increasing the risk of cracking.

AB - The oxidation behaviors of carbon/carbon composites prepared by chemical vapor infiltration method in wet oxygen were investigated by experiments and first-principle calculations. The results showed that the graphite components in mixed structure were easily destroyed and transformed into amorphous carbon in wet oxygen, accelerating the weight loss of C/C composites. The reason was ascribed to that hydroxyl radicals promoted the surface and inward diffusion of O atoms by uneven distribution of charges and formation of an exothermic reaction. Besides, the H transfer as a feasible way could result in the gather of epoxy radicals, increasing the risk of cracking.

KW - Carbon/carbon composites

KW - First principle

KW - H transfer

KW - O diffusion

KW - OH radical

KW - Wet oxygen

UR - https://www.scopus.com/pages/publications/85106527397

U2 - 10.1016/j.corsci.2021.109577

DO - 10.1016/j.corsci.2021.109577

M3 - 文章

AN - SCOPUS:85106527397

SN - 0010-938X

VL - 189

JO - Corrosion Science

JF - Corrosion Science

M1 - 109577

ER -

High-temperature oxidation behavior of C/C composites in wet oxygen: Experiment and first-principle calculations

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Keywords

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