TY - JOUR
T1 - High-temperature reactive spark plasma consolidation of TiB2–NbC ceramic composites
AU - Demirskyi, Dmytro
AU - Sakka, Yoshio
AU - Vasylkiv, Oleg
N1 - Funding Information:
This study was conducted with financial support from the JSPS Postdoctoral Fellowship by Japan Society of the Promotion of Science. This work was partially supported by Grant-in-Aid for Scientific Research B from Japan Society for the Promotion of Science (JSPS).
Publisher Copyright:
© 2015 Elsevier Ltd and Techna Group S.r.l.
PY - 2015/11
Y1 - 2015/11
N2 - The TiB2–NbC ceramic system was consolidated by reactive spark plasma sintering (SPS). Densification, phase relations, microstructure evolution, and their effect on the properties of SPS-consolidated TiB2–NbC bodies were examined. The densification of TiB2 was enhanced by the addition of NbC, with 10 wt% NbC being the most effective. The phases that developed during reaction-driven consolidation of the NbC–TiB2 system at 2000 °C were (Nb,Ti) carbide and (Ti,Nb) diboride solid solutions and 1–2 µm TiB2 grains. The best balance between hardness (24 GPa) and fracture toughness (6.8 MPa m−2) was found in 30 wt% NbC–TiB2 composites consolidated at 2000 °C for 5 min.
AB - The TiB2–NbC ceramic system was consolidated by reactive spark plasma sintering (SPS). Densification, phase relations, microstructure evolution, and their effect on the properties of SPS-consolidated TiB2–NbC bodies were examined. The densification of TiB2 was enhanced by the addition of NbC, with 10 wt% NbC being the most effective. The phases that developed during reaction-driven consolidation of the NbC–TiB2 system at 2000 °C were (Nb,Ti) carbide and (Ti,Nb) diboride solid solutions and 1–2 µm TiB2 grains. The best balance between hardness (24 GPa) and fracture toughness (6.8 MPa m−2) was found in 30 wt% NbC–TiB2 composites consolidated at 2000 °C for 5 min.
KW - NbC
KW - Reaction sintering
KW - Solid solution
KW - Spark plasma sintering
KW - TiB
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U2 - 10.1016/j.ceramint.2015.05.022
DO - 10.1016/j.ceramint.2015.05.022
M3 - Article
AN - SCOPUS:84930020512
SN - 0272-8842
VL - 41
SP - 10828
EP - 10834
JO - Ceramics International
JF - Ceramics International
IS - 9
ER -