TY - JOUR
T1 - Mechanical properties of 2O3-Cr2O3/Cr3C2 nanocomposite fabricated by spark plasma sintering
AU - Lin, Hao Tung
AU - Nayak, Pramoda K.
AU - Liu, Bo Zon
AU - Chen, Wei Hsio
AU - Huang, Jow Lay
N1 - Funding Information:
The authors thanks to the National Science Council of the ROC for its financial support under the contract no. NSC 99-2923-E-006-002-MY3 . The authors would like to thank Dr. Yang-Yuan Chen of Institute of Physics, Academia Sinica, Taipei, Taiwan, ROC to carry out SPS measurements.
Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2012/1
Y1 - 2012/1
N2 - The fine grains of Al2O3-Cr2O3/Cr-carbide nanocomposites were prepared by employing recently developed spark plasma sintering (SPS) technique. The initial materials were fabricated by a metal organic chemical vapor deposition (MOCVD) process, in which Cr(CO)6 was used as a precursor and Al2O3 powders as matrix in a spouted chamber. The basic mechanical properties like hardness, fracture strength and toughness, and the nanoindentation characterization of nanocomposites such as Elastics modulus (E), elastic work (We) and plastic work (Wp) were analyzed. The microstructure of dislocation, transgranular and step-wise fracture surface were observed in the nanocomposites. The nanocomposites show fracture toughness of (4.8MPam1/2) and facture strength (780MPa), which is higher than monolithic alumina. The strengthening mechanism from the secondary phase and solid solution are also discussed in the present work. Nanoindentation characterization further illustrates the strengthening of nanocomposites.
AB - The fine grains of Al2O3-Cr2O3/Cr-carbide nanocomposites were prepared by employing recently developed spark plasma sintering (SPS) technique. The initial materials were fabricated by a metal organic chemical vapor deposition (MOCVD) process, in which Cr(CO)6 was used as a precursor and Al2O3 powders as matrix in a spouted chamber. The basic mechanical properties like hardness, fracture strength and toughness, and the nanoindentation characterization of nanocomposites such as Elastics modulus (E), elastic work (We) and plastic work (Wp) were analyzed. The microstructure of dislocation, transgranular and step-wise fracture surface were observed in the nanocomposites. The nanocomposites show fracture toughness of (4.8MPam1/2) and facture strength (780MPa), which is higher than monolithic alumina. The strengthening mechanism from the secondary phase and solid solution are also discussed in the present work. Nanoindentation characterization further illustrates the strengthening of nanocomposites.
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U2 - 10.1016/j.jeurceramsoc.2011.07.029
DO - 10.1016/j.jeurceramsoc.2011.07.029
M3 - Article
AN - SCOPUS:80054794982
SN - 0955-2219
VL - 32
SP - 77
EP - 83
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 1
ER -