Detail publikace

Thermal cycling effect on the phase stability and fracture resistance of synthetic barium/magnesium aluminosilicate systems

CASAS LUNA, M. RAVASZOVÁ, S. SKALKA, P. GEJDOŠ, P. JECH, D. SLÁMEČKA, K. KAISER, J. DVOŘÁK, K. ČELKO, L.

Originální název

Thermal cycling effect on the phase stability and fracture resistance of synthetic barium/magnesium aluminosilicate systems

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

This paper focuses on the high-temperature solid-state synthesis of barium-magnesium-aluminosilicate (BMAS) system and its thermal cycling stability between the room temperature and 1200 degrees C. The BMAS powder was synthesized by adding 0.8 mol of MgO for 1 mol of BaAl2Si2O8 (BAS system) to get a stabilized monoclinic phase (celsian-BMAS). The undoped BAS system with a metastable hexagonal phase (hexacelsian-BAS) was also produced for comparison. Both celsian-BMAS and hexacelsian-BAS powders were sintered by spark plasma sintering (SPS) technique at 1300 degrees C and 50 MPa. In-situ X-ray diffraction and thermogravimetric analyses together with hardness and indentation fracture resistance measurements proved the thermal stability of the celsian-BMAS system. In contrast, the hexacelsian-BAS compound suffered typical phase transformations during the thermal cycling test, causing its failure in less than 25 cycles. The presence of magnesium in the BMAS system led to the formation of secondary phases, such as Ba/Mg-rich micas and/or barium silicides, which did not affect the thermal integrity of the stable celsian phase. The celsian-BMAS system exhibited a linear thermal expansion in all unit cell directions, giving better thermal reliability to this material over the hexacelsian-BAS system. Besides, this work emphasizes the phase transformations in the studied systems that have been ignored in previous research, and it also compares several common equations for calculation of the indentation fracture resistance.

Klíčová slova

Barium-magnesium-aluminosilicate; Solid-state reaction; Thermal-phase stability; Thermal cycling behavior; Indentation fracture resistance

Autoři

CASAS LUNA, M.; RAVASZOVÁ, S.; SKALKA, P.; GEJDOŠ, P.; JECH, D.; SLÁMEČKA, K.; KAISER, J.; DVOŘÁK, K.; ČELKO, L.

Vydáno

19. 6. 2020

Nakladatel

ELSEVIER SCI LTD

Místo

OXFORD

ISSN

0272-8842

Periodikum

Ceramics International

Ročník

46

Číslo

15

Stát

Spojené království Velké Británie a Severního Irska

Strany od

24129

Strany do

24136

Strany počet

8

URL

https://doi.org/10.1016/j.ceramint.2020.06.192

BibTex

@article{BUT165226,
  author="Mariano {Casas Luna} and Simona {Ravaszová} and Petr {Skalka} and Pavel {Gejdoš} and David {Jech} and Karel {Slámečka} and Jozef {Kaiser} and Karel {Dvořák} and Ladislav {Čelko}",
  title="Thermal cycling effect on the phase stability and fracture resistance of synthetic barium/magnesium aluminosilicate systems",
  journal="Ceramics International",
  year="2020",
  volume="46",
  number="15",
  pages="24129--24136",
  doi="10.1016/j.ceramint.2020.06.192",
  issn="0272-8842",
  url="https://doi.org/10.1016/j.ceramint.2020.06.192"
}