Influence of low-level oxidation on mechanical property of two-dimension carbon/carbon composites

Long Li, Xie Rong Zeng, He Jun Li, Xin Bo Xiong, Xiao Hua Li, Sheng Hui Xie

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The effect of low-level oxidation (weight loss less than 6wt.%) on mechanical property of two-dimension (2D) carbon/carbon (C/C) composites was investigated in present work. C/C samples were oxidized in a mixture gas, composed of 10vol%O2 and 90vol%N2, at temperatures of 850°C and 1300°C, respectively. The strength of C/C composites before and after oxidation was measured by three point flexural tests. At different temperature, similar influences of low-level oxidation on mechanical property of C/C samples were observed. As a result, failure of the as-received composites was accompanied by brittle, catastrophic reduction in force. As oxidation progressed, the fracture model of oxidized samples changed from brittle model to pseudoplastic failure model. Especially, the changes of flexural strength with the weight loss increasing could be divided into two stages: (i) at low weight loss, the strength increased with weight loss and is slightly higher than that of the unoxidized composites; (ii) at high weight loss, the strength decreased gradually with the weight loss.

Original languageEnglish
Title of host publicationMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures
PublisherTrans Tech Publications
Pages455-458
Number of pages4
ISBN (Print)0878493786, 9780878493784
DOIs
StatePublished - 2008
EventMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures - Hong Kong, P.R., China
Duration: 28 Jul 200831 Jul 2008

Publication series

NameAdvanced Materials Research
Volume47-50 PART 1
ISSN (Print)1022-6680

Conference

ConferenceMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures
Country/TerritoryChina
CityHong Kong, P.R.
Period28/07/0831/07/08

Keywords

  • Carbon/carbon composites
  • Mechanical property
  • Oxidation

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