TY  - JOUR
T1  - Grain-Refinement of SiC-ZrO<sub>2</sub> Ceramic Matrix: Characterizations and Its Effect on Mechanical Properties
AU - Anggraini, Lydia AU - Ameyama, Kei 
JO  - Journal of Engineering and Applied Sciences
VL  - 12
IS  - 16
SP  - 4034
EP  - 4038
PY  - 2017
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2017.4034.4038
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2017.4034.4038
KW  - Mechanical milling
KW  -spark plasma sintering
KW  -SiC-ZrO
KW  -microstructure
KW  -mechanical properties
KW  -remarkable design
AB  - Silicon carbide with 50 mass% zirconia ceramic matrix composites were processed by Mechanical
Milling (MM) followed by Spark Plasma Sintering (SPS). By controlling the parameters of MM and SPS, an
ultra-fine ZrO<sub>2</sub> grain was homogeneously dispersed and refined on the surface of a fine SiC powder, forming 2
a harmonic microstructure. The mechanical properties and the densification behavior of the SiC-ZrO<sub>2</sub> composites were investigated. The effects of the milling time on the microstructure and on the mechanical
properties of the composite are discussed. The results indicate that the composite mechanically milled
for 144 ksec and sintered at 1773 K had the highest relative density of 98% along with a bending
strength of 1128 MPa and a fracture toughness of 10.7 MPa.m &frac12;. These superior mechanical properties were
influenced by the microstructure characteristics such as the homogeneous grain dispersion. Thus, the grain
refinement forming harmonic microstructure can be considered a remarkable design tool for improving the
mechanical properties of SiC-ZrO<sub>2</sub> as well as other ceramic composite materials.
ER  -