journal article·2015-07-01Open access

Antioxidant modification of C/C composites by in situ hydrothermally synthesized 4ZnO·B 2 O 3 ·H 2 O

Liu-Qing Yang, Jian-Feng Huang, He-Jun Li, Li-Yun Cao, Jie Fei, Hai-Bo Ouyang, Jian-Peng Wu, Wei Hao

Abstract

Abstract Antioxidant modification of carbon/carbon (C/C) composites by in situ hydrothermally synthesized 4ZnO·B 2 O 3 ·H 2 O was successfully achieved. Samples were characterized by X-ray diffraction, scanning electron microscopy, isothermal oxidation test and thermogravimetry/differential scanning calorimetry. The influence of hydrothermal temperature on the phase composition and microstructure of as-prepared 4ZnO·B 2 O 3 ·H 2 O, and the antioxidant modification of C/C composites were investigated. Results showed that 4ZnO·B 2 O 3 ·H 2 O crystallite coating was achieved on the surface of C/C composites at the hydrothermal temperature range of 100–180°C. A smooth and crack-free 4ZnO·B 2 O 3 ·H 2 O layer was obtained when the hydrothermal temperature reached 140°C. The isothermal oxidation test showed that the oxidation resistance of C/C composites was improved. The as-modified composites exhibited a weight loss of only 1.93 g/cm 3 after oxidation at 600°C for 15 h, while the non-modified one had a weight loss of 5.20 g/cm 3 after only 10 h of oxidation.
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Research context

OpenAlex topics: Magnesium Oxide Properties and Applications · Metal-Organic Frameworks: Synthesis and Applications · Bone Tissue Engineering Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Material Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, PR China

State Key Laboratory of Solidification Processing, Northwestern Polytechnic University, Xi’an 710021, PR China

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