Publication detail

Iron precipitation in basalt fibres embedded in partially pyrolysed methylsiloxane matrix

HALASOVÁ, M. KUBĚNA, I. ROUPCOVÁ, P. ČERNÝ, M. STRACHOTA, A. CHLUP, Z.

Original Title

Iron precipitation in basalt fibres embedded in partially pyrolysed methylsiloxane matrix

Type

journal article in Web of Science

Language

English

Original Abstract

Composites investigated in this article owned the highest fracture resistance after pyrolysis at 650 degrees C. Above 700 degrees C the mechanical properties of the composites deteriorated as the matrix transformation and fibre crystallisation progressed. In this work, it was found that the crystallisation processes in fibres were affected by diffusion of pyrolysis gases through the fibre matrix interface. Additional annealing in oxidative atmosphere distinctly changed the crystallisation processes, resulting in a slightly improved fracture toughness of the composites. Microstructural changes in the composite were investigated using SEM, TEM, and Mossbauer spectroscopy. Crystals of elemental iron (Fe-0) were found in the fibres. Their formation can be explained by the reduction of ferrous (Fe2+) ions initially present in the fibres by pyrolysis gases (hydrogen, methane) released from the pyrolysing matrix. The BCC lattice of the Fe-0 particles was clearly assigned by comparison of measured diffraction patterns with reference data as well as by the Mossbauer spectroscopy.

Keywords

Pyrolysis; BCC iron; Precipitation; Basalt fibres; Composite; Crystallisation; TEM; SEM; Mossbauer spectroscopy

Authors

HALASOVÁ, M.; KUBĚNA, I.; ROUPCOVÁ, P.; ČERNÝ, M.; STRACHOTA, A.; CHLUP, Z.

Released

1. 8. 2019

Publisher

ELSEVIER SCI LTD

Location

OXFORD

ISBN

1359-835X

Periodical

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING

Year of study

123

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

286

Pages to

292

Pages count

7

URL

https://www.sciencedirect.com/science/article/pii/S1359835X19302015

BibTex

@article{BUT161964,
  author="Martina {Halasová} and Ivo {Kuběna} and Pavla {Roupcová} and Martin {Černý} and Adam {Strachota} and Zdeněk {Chlup}",
  title="Iron precipitation in basalt fibres embedded in partially pyrolysed methylsiloxane matrix",
  journal="COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING",
  year="2019",
  volume="123",
  number="1",
  pages="286--292",
  doi="10.1016/j.compositesa.2019.05.026",
  issn="1359-835X",
  url="https://www.sciencedirect.com/science/article/pii/S1359835X19302015"
}