Effect of HfC on the ablative and mechanical properties of C/C composites

Li Shu-Ping; Li Ke-zhi; Li He-Jun; Li Yu-Long; Yuan Qin-Lu

doi:10.1016/j.msea.2009.03.040

Effect of HfC on the ablative and mechanical properties of C/C composites

Li Shu-Ping, Li Ke-zhi, Li He-Jun, Li Yu-Long, Yuan Qin-Lu

Northwestern Polytechnical University Xian

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

43 Scopus citations

Abstract

The ablation and mechanical behavior of the carbon/carbon (C/C) and hafnium carbide (HfC) modified C/C (HfC-C/C) composites were evaluated by oxyacetylene flame and the three-point bending tests. The effect of impact damage on their mechanical behavior was also investigated. To produce the HfC-C/C composites, the refractory carbide precursor was introduced to the preforms by impregnating with HfOCl₂·8H₂O solution. Both the C/C and the HfC-C/C preforms were densified by thermal gradient chemical vapor infiltration. Results indicated that, although the linear and mass ablation rates exhibited by the HfC-C/C composites were lower than those for the C/C composites by 55% and 21%, respectively, the maximum flexural load for the C/C composites was significantly higher by 33% than that of HfC-C/C composites. The influence of pre-impact loading on mechanical behavior was greater for the HfC-C/C composites than for the C/C composites.

Original language	English
Pages (from-to)	61-67
Number of pages	7
Journal	Materials Science and Engineering: A
Volume	517
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2009.03.040
State	Published - 20 Aug 2009

Keywords

Ablation
C/C composites
Hafnium carbide
Impact damage
Mechanical properties

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title = "Effect of HfC on the ablative and mechanical properties of C/C composites",

abstract = "The ablation and mechanical behavior of the carbon/carbon (C/C) and hafnium carbide (HfC) modified C/C (HfC-C/C) composites were evaluated by oxyacetylene flame and the three-point bending tests. The effect of impact damage on their mechanical behavior was also investigated. To produce the HfC-C/C composites, the refractory carbide precursor was introduced to the preforms by impregnating with HfOCl2·8H2O solution. Both the C/C and the HfC-C/C preforms were densified by thermal gradient chemical vapor infiltration. Results indicated that, although the linear and mass ablation rates exhibited by the HfC-C/C composites were lower than those for the C/C composites by 55% and 21%, respectively, the maximum flexural load for the C/C composites was significantly higher by 33% than that of HfC-C/C composites. The influence of pre-impact loading on mechanical behavior was greater for the HfC-C/C composites than for the C/C composites.",

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author = "Li Shu-Ping and Li Ke-zhi and Li He-Jun and Li Yu-Long and Yuan Qin-Lu",

year = "2009",

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doi = "10.1016/j.msea.2009.03.040",

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T1 - Effect of HfC on the ablative and mechanical properties of C/C composites

AU - Shu-Ping, Li

AU - Ke-zhi, Li

AU - He-Jun, Li

AU - Yu-Long, Li

AU - Qin-Lu, Yuan

PY - 2009/8/20

Y1 - 2009/8/20

N2 - The ablation and mechanical behavior of the carbon/carbon (C/C) and hafnium carbide (HfC) modified C/C (HfC-C/C) composites were evaluated by oxyacetylene flame and the three-point bending tests. The effect of impact damage on their mechanical behavior was also investigated. To produce the HfC-C/C composites, the refractory carbide precursor was introduced to the preforms by impregnating with HfOCl2·8H2O solution. Both the C/C and the HfC-C/C preforms were densified by thermal gradient chemical vapor infiltration. Results indicated that, although the linear and mass ablation rates exhibited by the HfC-C/C composites were lower than those for the C/C composites by 55% and 21%, respectively, the maximum flexural load for the C/C composites was significantly higher by 33% than that of HfC-C/C composites. The influence of pre-impact loading on mechanical behavior was greater for the HfC-C/C composites than for the C/C composites.

AB - The ablation and mechanical behavior of the carbon/carbon (C/C) and hafnium carbide (HfC) modified C/C (HfC-C/C) composites were evaluated by oxyacetylene flame and the three-point bending tests. The effect of impact damage on their mechanical behavior was also investigated. To produce the HfC-C/C composites, the refractory carbide precursor was introduced to the preforms by impregnating with HfOCl2·8H2O solution. Both the C/C and the HfC-C/C preforms were densified by thermal gradient chemical vapor infiltration. Results indicated that, although the linear and mass ablation rates exhibited by the HfC-C/C composites were lower than those for the C/C composites by 55% and 21%, respectively, the maximum flexural load for the C/C composites was significantly higher by 33% than that of HfC-C/C composites. The influence of pre-impact loading on mechanical behavior was greater for the HfC-C/C composites than for the C/C composites.

KW - Ablation

KW - C/C composites

KW - Hafnium carbide

KW - Impact damage

KW - Mechanical properties

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Effect of HfC on the ablative and mechanical properties of C/C composites

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Keywords

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