TY - JOUR
T1 - Sintering of SiC/Ti3SiC2 composites with high SiC contents
AU - Chahhou, B.
AU - Roger, J.
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/12
Y1 - 2023/12
N2 - The SPS reactive sintering of SiC/Ti3SiC2 composites with high SiC contents was studied by adding SiC to reactive (2TiC+1Ti+1.2Si+0.2Al) or (3TiC+2.2Si+0.2Al) mixtures. Four final volume percentages of SiC were targeted: 21 %, 50 %, 60 % and 70 % by adding the appropriate amounts of a micro-sized SiC powder to the reactive mixtures. The synthesis and the sintering of SiC/Ti3SiC2 composites were realized at 1500 °C/15 min/50 MPa from these mixtures. Due to liquid losses and SiO volatilization, the silicon lack was proven to be a significant limitation in the synthesis of Ti3SiC2 + nSiC composites. A deleterious effect of SiC additions was evidenced on both the reaction and the densification. Finally, Ti3SiC2 + nSiC composites were successfully obtained up to 50 vol% and 60 vol% of SiC from the (2TiC+1Ti+1.2Si+0.2Al) and (3TiC+2.2Si+0.2Al) mixtures, respectively. The thermodynamic calculations showed that the driving force of formation of SiC was very high which could disturb the syntheses from the (3TiC+2.2Si+0.2Al) mixture.
AB - The SPS reactive sintering of SiC/Ti3SiC2 composites with high SiC contents was studied by adding SiC to reactive (2TiC+1Ti+1.2Si+0.2Al) or (3TiC+2.2Si+0.2Al) mixtures. Four final volume percentages of SiC were targeted: 21 %, 50 %, 60 % and 70 % by adding the appropriate amounts of a micro-sized SiC powder to the reactive mixtures. The synthesis and the sintering of SiC/Ti3SiC2 composites were realized at 1500 °C/15 min/50 MPa from these mixtures. Due to liquid losses and SiO volatilization, the silicon lack was proven to be a significant limitation in the synthesis of Ti3SiC2 + nSiC composites. A deleterious effect of SiC additions was evidenced on both the reaction and the densification. Finally, Ti3SiC2 + nSiC composites were successfully obtained up to 50 vol% and 60 vol% of SiC from the (2TiC+1Ti+1.2Si+0.2Al) and (3TiC+2.2Si+0.2Al) mixtures, respectively. The thermodynamic calculations showed that the driving force of formation of SiC was very high which could disturb the syntheses from the (3TiC+2.2Si+0.2Al) mixture.
KW - Composites
KW - SiC
KW - Sintering
KW - Thermodynamic calculations
KW - TiSiC
UR - http://www.scopus.com/inward/record.url?scp=85167779773&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2023.07.068
DO - 10.1016/j.jeurceramsoc.2023.07.068
M3 - Article
AN - SCOPUS:85167779773
SN - 0955-2219
VL - 43
SP - 7314
EP - 7325
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 16
ER -