TY - GEN
T1 - Crack-healing effectiveness of nano Ni + SiC Co-dispersed alumina hybrid materials
AU - Maruoka, Daisuke
AU - Sato, Yoku
AU - Nanko, Makoto
N1 - Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.
PY - 2010
Y1 - 2010
N2 - Crack-healing effectiveness of nano-Ni+SiC co-dispersed Al 2O3 hybrid materials by heat treatment was studied as well as oxidation behavior. The starting powder mixture was prepared by drying slurry consisting of distilled water, Al2O3, SiC powder and nickel nitrate. After reduction, the powder mixture was densified by pulsed electric current sintering. Cracks were introduced by a Vickers indenter. Specimens were exposed into air at temperature ranging from 1000 and 1300° C for 1 and 48 h. Thickness of oxidized zone in SiC+nano-Ni/Al2O 3 thinner than nano-Ni/Al2O3. Cracks of SiC+nano-Ni/Al2O3 disappeared completely, for example, by oxidation at 1200° C for 6 h, as same as nano-Ni/Al2O 3. Bending strength of crack-disappeared SiC+nano-Ni/Al 2O3 showed 519 MPa and was comparable with that of as-sintered one. SiC+nano-Ni/Al2O3 pocesses crack-healing effectiveness with improved high-temperature oxidation resistance.
AB - Crack-healing effectiveness of nano-Ni+SiC co-dispersed Al 2O3 hybrid materials by heat treatment was studied as well as oxidation behavior. The starting powder mixture was prepared by drying slurry consisting of distilled water, Al2O3, SiC powder and nickel nitrate. After reduction, the powder mixture was densified by pulsed electric current sintering. Cracks were introduced by a Vickers indenter. Specimens were exposed into air at temperature ranging from 1000 and 1300° C for 1 and 48 h. Thickness of oxidized zone in SiC+nano-Ni/Al2O 3 thinner than nano-Ni/Al2O3. Cracks of SiC+nano-Ni/Al2O3 disappeared completely, for example, by oxidation at 1200° C for 6 h, as same as nano-Ni/Al2O 3. Bending strength of crack-disappeared SiC+nano-Ni/Al 2O3 showed 519 MPa and was comparable with that of as-sintered one. SiC+nano-Ni/Al2O3 pocesses crack-healing effectiveness with improved high-temperature oxidation resistance.
KW - AlO
KW - Bending strength
KW - Crack-healing
KW - High-temperature oxidation
KW - Nanocomposite
KW - Pulsed electric current sintering
UR - http://www.scopus.com/inward/record.url?scp=75749130347&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=75749130347&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.89-91.365
DO - 10.4028/www.scientific.net/AMR.89-91.365
M3 - Conference contribution
AN - SCOPUS:75749130347
SN - 0878492933
SN - 9780878492930
T3 - Advanced Materials Research
SP - 365
EP - 370
BT - THERMEC 2009 Supplement
T2 - 6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009
Y2 - 25 August 2009 through 29 August 2009
ER -