Temperature-induced phase and microstructural transformations in a synthesized iron carbonate (siderite) complex

Sumanta Das, Ahmet B. Kizilkanat, Swaptik Chowdhury, David Stone, Narayanan Neithalath

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The influence of exposure to high temperatures on the phase transformation, microstructural features, and the resultant mechanical properties of a binder based on carbonation of metallic iron powder is reported. The extent of thermal decomposition of the binder at different temperatures is quantified using thermogravimetric analysis (TGA), whereas Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) are used for the identification of transformed phases. High temperature exposure is observed to result in stable phases, which results in the material retaining structural integrity even when exposed to 800. °C, contrary to ordinary Portland cement (OPC) pastes that degrade completely at such temperatures. Significant pore size refinement and a small reduction in porosity are noted when the pastes are exposed to high temperatures. Even though there is a significant strength loss when the iron carbonates decompose (around ~. 300. °C), the strengths are much higher than those of OPC pastes at higher temperatures. This provides an option for chemistry-based design of high-temperature resistant composites as well as develop structural envelope materials especially when prolonged resistance to more than 600. °C is desired.

Original languageEnglish (US)
Pages (from-to)189-199
Number of pages11
JournalMaterials and Design
Volume92
DOIs
StatePublished - Feb 15 2016

Fingerprint

Carbonates
Iron
Ointments
Temperature
Portland cement
Binders
Iron powder
Carbonation
Structural integrity
siderite
Pore size
Fourier transform infrared spectroscopy
Thermogravimetric analysis
Pyrolysis
Porosity
Phase transitions
X ray diffraction
Mechanical properties
Composite materials

Keywords

  • Carbonation
  • Crystallization
  • Iron powder
  • Microstructure
  • Pore structure
  • Thermal decomposition

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Temperature-induced phase and microstructural transformations in a synthesized iron carbonate (siderite) complex. / Das, Sumanta; Kizilkanat, Ahmet B.; Chowdhury, Swaptik; Stone, David; Neithalath, Narayanan.

In: Materials and Design, Vol. 92, 15.02.2016, p. 189-199.

Research output: Contribution to journalArticle

Das, Sumanta ; Kizilkanat, Ahmet B. ; Chowdhury, Swaptik ; Stone, David ; Neithalath, Narayanan. / Temperature-induced phase and microstructural transformations in a synthesized iron carbonate (siderite) complex. In: Materials and Design. 2016 ; Vol. 92. pp. 189-199.
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