Research output: Contribution to journal › Article › peer-review
Effect of chromium additive on sintering and oxidation behavior of HfB2-SiC ceramics. / Bannykh, D.; Utkin, A.; Baklanova, N.
In: Ceramics International, Vol. 44, No. 11, 01.08.2018, p. 12451-12457.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Effect of chromium additive on sintering and oxidation behavior of HfB2-SiC ceramics
AU - Bannykh, D.
AU - Utkin, A.
AU - Baklanova, N.
PY - 2018/8/1
Y1 - 2018/8/1
N2 - The effect of chromium admixture on the processes in the HfB2-SiC ceramic powder system during its pressureless sintering at 1600 °C was studied. It was shown that an increase in chromium content from 0% to 15.5% in the HfB2-SiC ceramic powder mixture leads to a continuous increase in its relative density up to 90%. A transient liquid phase Cr-Si-C-B is formed at 1600 °C, and it promotes intense sintering of HfB2 and SiC powders. The oxidation resistance of HfB2-SiC-Cr ceramics was studied in static air at 1000–1500 °C. It was shown that the oxidation resistance is greatly improved due to a decrease in the porosity of the sintered ceramic system because of chromium additive. The presence of chromium oxide in the formed surface glassy layer can also lead to the increase in the oxidation resistance. These results suggest that chromium can be considered as a promising sintering additive for HfB2-SiC and similar systems.
AB - The effect of chromium admixture on the processes in the HfB2-SiC ceramic powder system during its pressureless sintering at 1600 °C was studied. It was shown that an increase in chromium content from 0% to 15.5% in the HfB2-SiC ceramic powder mixture leads to a continuous increase in its relative density up to 90%. A transient liquid phase Cr-Si-C-B is formed at 1600 °C, and it promotes intense sintering of HfB2 and SiC powders. The oxidation resistance of HfB2-SiC-Cr ceramics was studied in static air at 1000–1500 °C. It was shown that the oxidation resistance is greatly improved due to a decrease in the porosity of the sintered ceramic system because of chromium additive. The presence of chromium oxide in the formed surface glassy layer can also lead to the increase in the oxidation resistance. These results suggest that chromium can be considered as a promising sintering additive for HfB2-SiC and similar systems.
KW - A. Sintering
KW - B. Porosity
KW - C. Thermal properties
KW - D. Borides, SiC
KW - ZRB2-SIC CERAMICS
KW - REFRACTORY DIBORIDES
KW - HAFNIUM
KW - COMPOSITES
KW - Borides, SiC
KW - Thermal properties
KW - ZIRCONIUM
KW - TEMPERATURE
KW - Sintering
KW - SI
KW - GROWTH
KW - Porosity
UR - http://www.scopus.com/inward/record.url?scp=85045078300&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2018.04.035
DO - 10.1016/j.ceramint.2018.04.035
M3 - Article
AN - SCOPUS:85045078300
VL - 44
SP - 12451
EP - 12457
JO - Ceramics International
JF - Ceramics International
SN - 0272-8842
IS - 11
ER -
ID: 12475463