TY - JOUR
T1 - Co-reinforcing of ZrB2–SiC ceramics with optimized ZrC to Cf ratio
AU - Adibpur, Farhad
AU - Tayebifard, Seyed Ali
AU - Zakeri, Mohammad
AU - Shahedi Asl, Mehdi
N1 - Publisher Copyright:
© 2020 Elsevier Ltd and Techna Group S.r.l.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - Characteristics of ZrB2–SiC ultrahigh temperature ceramic matrix composites (UHTCMCs) reinforced with ZrC and carbon fiber (Cf) were investigated in this article. Spark plasma sintering (SPS) process was utilized to fabricate the samples at 1800 °C for 5 min under 30 MPa punch pressure and vacuumed atmosphere. In all samples, the volume ratio of ZrB2: SiC was equal to 4:1, and the summation of ZrC and Cf reinforcements was 7.5 vol% with different ZrC: Cf ratios. Field emission scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), densitometry, flexural strength, and hardness measurements were employed for characterization of the prepared samples. Microstructural inspection revealed the formation of SiC sheath around the carbon fibers due to several reactions in the surface SiO2 layers existed on the SiC particles. Optimal flexural strength (628.4 MPa) and hardness (20.8 GPa) values were achieved for the sample co-reinforced with 6.5 vol% ZrC and 1 vol% Cf, with a relative density of 97.7%.
AB - Characteristics of ZrB2–SiC ultrahigh temperature ceramic matrix composites (UHTCMCs) reinforced with ZrC and carbon fiber (Cf) were investigated in this article. Spark plasma sintering (SPS) process was utilized to fabricate the samples at 1800 °C for 5 min under 30 MPa punch pressure and vacuumed atmosphere. In all samples, the volume ratio of ZrB2: SiC was equal to 4:1, and the summation of ZrC and Cf reinforcements was 7.5 vol% with different ZrC: Cf ratios. Field emission scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), densitometry, flexural strength, and hardness measurements were employed for characterization of the prepared samples. Microstructural inspection revealed the formation of SiC sheath around the carbon fibers due to several reactions in the surface SiO2 layers existed on the SiC particles. Optimal flexural strength (628.4 MPa) and hardness (20.8 GPa) values were achieved for the sample co-reinforced with 6.5 vol% ZrC and 1 vol% Cf, with a relative density of 97.7%.
KW - Carbon fiber
KW - Mechanical properties
KW - SiC sheath
KW - Spark plasma sintering
KW - ZrB–SiC composites
KW - ZrC
UR - http://www.scopus.com/inward/record.url?scp=85086520284&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2020.06.029
DO - 10.1016/j.ceramint.2020.06.029
M3 - Article
AN - SCOPUS:85086520284
SN - 0272-8842
VL - 46
SP - 22661
EP - 22673
JO - Ceramics International
JF - Ceramics International
IS - 14
ER -