Bio-inspired crack self-healing of SiC/spinel nanocomposite

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Crack self-healing behavior of SiC/spinel nanocomposite, obtained from talc, aluminum and graphite powders was evaluated as a function of time, temperature and the environment atmosphere. The mechanism that was involved in the crack-healing was investigated and the outcome revealed both physical and chemical phenomena are involved in the healing process. In the presence of oxygen at high temperatures, SiC reacts with oxygen to form SiO2 which is accompanied with about 80% volume expansion. On the other hand, the formed silica reacts with the matrix and produces some transition compounds which can rebond crack walls together. The results showed that cracks can be completely healed after heat treatment at 1545 °C in static air for only 1 min.

Original languageEnglish (US)
Pages (from-to)2828-2835
Number of pages8
JournalCeramics International
Volume41
Issue number2
DOIs
StatePublished - Mar 1 2015

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Nanocomposites
Cracks
Oxygen
Talc
Graphite
Aluminum
Silicon Dioxide
Powders
Heat treatment
Silica
Temperature
spinell
Air

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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title = "Bio-inspired crack self-healing of SiC/spinel nanocomposite",
abstract = "Crack self-healing behavior of SiC/spinel nanocomposite, obtained from talc, aluminum and graphite powders was evaluated as a function of time, temperature and the environment atmosphere. The mechanism that was involved in the crack-healing was investigated and the outcome revealed both physical and chemical phenomena are involved in the healing process. In the presence of oxygen at high temperatures, SiC reacts with oxygen to form SiO2 which is accompanied with about 80{\%} volume expansion. On the other hand, the formed silica reacts with the matrix and produces some transition compounds which can rebond crack walls together. The results showed that cracks can be completely healed after heat treatment at 1545 °C in static air for only 1 min.",
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Bio-inspired crack self-healing of SiC/spinel nanocomposite. / Tavangarian, Fariborz; Li, Guoqiang.

In: Ceramics International, Vol. 41, No. 2, 01.03.2015, p. 2828-2835.

Research output: Contribution to journalArticle

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