Detail publikace

Activated Sintering of Cr2O3-Based Composites by Hot Pressing

GEVORKYAN, E. CEPOVA, L. RUCKI, M. NERUBATSKYI, V. MOROZOW, D. ZUROWSKI, W. BARSAMYAN,V. KOUŘIL, K.

Originální název

Activated Sintering of Cr2O3-Based Composites by Hot Pressing

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

The paper presents and discusses questions on structure formation during the sintering process of Cr2O3-based composites using the hot pressing method, when a chemical reaction between the components takes place. The task was difficult because Cr2O3 decomposes when sintered at temperatures above 1300 degrees C. The proposed novel method allowed for interaction between aluminum and chromia, thus avoiding the decomposition of the latter. Here, ultrafine aluminum powder played the role of the active agent forming a liquid phase and reacting with Cr2O3. The appearance of the solid solutions of (Cr,Al)(2)O-3 with different stoichiometry of Cr and Al depended on the aluminum content in the initial mixture. The solid solution significantly strengthened boundaries between composite phases, resulting in the composite material of high fracture toughness between 5 and 7 MPa m(1/2) and bending strength of ca. 500 MPa. The best mechanical properties exhibited the cermet with 22 wt.% of the restored chromium.

Klíčová slova

composite; chromium oxide; reactive sintering; solid solution; phase boundaries

Autoři

GEVORKYAN, E.; CEPOVA, L.; RUCKI, M.; NERUBATSKYI, V.; MOROZOW, D.; ZUROWSKI, W.; BARSAMYAN,V.; KOUŘIL, K.

Vydáno

29. 8. 2022

Nakladatel

MDPI

Místo

BASEL

ISSN

1996-1944

Periodikum

Materials

Ročník

15

Číslo

17

Stát

Švýcarská konfederace

Strany počet

15

URL

https://www.mdpi.com/1996-1944/15/17/5960

BibTex

@article{BUT179327,
  author="GEVORKYAN, E. and CEPOVA, L. and RUCKI, M. and NERUBATSKYI, V. and MOROZOW, D. and ZUROWSKI, W. and BARSAMYAN,V. and KOUŘIL, K.",
  title="Activated Sintering of Cr2O3-Based Composites by Hot Pressing",
  journal="Materials",
  year="2022",
  volume="15",
  number="17",
  pages="15",
  doi="10.3390/ma15175960",
  issn="1996-1944",
  url="https://www.mdpi.com/1996-1944/15/17/5960"
}