TY - JOUR
T1 - Triplet carbide composites of TiC, WC, and SiC
AU - Fattahi, Mehdi
AU - Delbari, Seyed Ali
AU - Babapoor, Aziz
AU - Sabahi Namini, Abbas
AU - Mohammadi, Mohsen
AU - Shahedi Asl, Mehdi
N1 - Publisher Copyright:
© 2019 Elsevier Ltd and Techna Group S.r.l.
PY - 2020/5
Y1 - 2020/5
N2 - In this study, the influence of adding 0, 10, 20, and 30 vol% SiCw on the microstructure and physical-mechanical properties (relative density (RD), flexural strength, and Vickers hardness) of TiC-3 wt% WCn was investigated. All designed samples were spark plasma sintered under the same conditions: sintering temperature of 1900 °C, external pressure of 40 MPa, and dwell time of 7 min. Microstructural evaluation and relative density calculation revealed that the additives were dispersed homogeneously in the TiC matrix. Based on the Archimedes principles, RD values of >100% were measured for the composite samples with 20 and 30 vol% SiCw, due to not accounting the formation of non-stoichiometric TiC and (Ti,W)C phases in the calculations. On the contrary, the lowest RD was related to the sample with 10 vol% SiCw. On the other hand, the most significant values of Vickers hardness (28.6 GPa) and flexural strength (694 MPa) were obtained for TiC-3 wt% WCn and TiC-3 wt% WCn-20 vol% SiCw composite samples, respectively.
AB - In this study, the influence of adding 0, 10, 20, and 30 vol% SiCw on the microstructure and physical-mechanical properties (relative density (RD), flexural strength, and Vickers hardness) of TiC-3 wt% WCn was investigated. All designed samples were spark plasma sintered under the same conditions: sintering temperature of 1900 °C, external pressure of 40 MPa, and dwell time of 7 min. Microstructural evaluation and relative density calculation revealed that the additives were dispersed homogeneously in the TiC matrix. Based on the Archimedes principles, RD values of >100% were measured for the composite samples with 20 and 30 vol% SiCw, due to not accounting the formation of non-stoichiometric TiC and (Ti,W)C phases in the calculations. On the contrary, the lowest RD was related to the sample with 10 vol% SiCw. On the other hand, the most significant values of Vickers hardness (28.6 GPa) and flexural strength (694 MPa) were obtained for TiC-3 wt% WCn and TiC-3 wt% WCn-20 vol% SiCw composite samples, respectively.
KW - Characterization
KW - SiC whiskers
KW - Spark plasma sintering
KW - TiC matrix composite
KW - WC nano-particles
UR - http://www.scopus.com/inward/record.url?scp=85076992116&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2019.12.155
DO - 10.1016/j.ceramint.2019.12.155
M3 - Article
AN - SCOPUS:85076992116
SN - 0272-8842
VL - 46
SP - 9070
EP - 9078
JO - Ceramics International
JF - Ceramics International
IS - 7
ER -