TY - GEN
T1 - Developing yttria-based ceramics having high liquid metal corrosion resistance
AU - Nguyen, Son Thanh
AU - Nakayama, Tadachika
AU - Rozali, Shaifulazuar Bin
AU - Suematsu, Hisayuki
AU - Suzuki, Tsuneo
AU - Jiang, Weihua
AU - Amarume, Satoshi
AU - He, Lingfeng
AU - Niihara, Koichi
PY - 2014
Y1 - 2014
N2 - The deterioration, caused by surface corrosion occurring at high temperatures, of the shell of casting mold costs the manufacturing industry great losses annually. When the demand for finding new materials for the shell is crucial, the yttria-based ceramic Y2Ti2O7 possessing superior hardness, thermal-creep and corrosion resistance is a potential candidate. In this study, Y2O3 and TiO2 powders were mixed in 1:2 of mole ratio to synthesize Y2Ti2O7 powder, which was then used to sinter ceramic plates by hot-pressing method. Depending on the particle size of starting material, various types of Y2Ti2O7 were sintered with variation in density, hardness, flexural strength and fracture toughness. The one having the best mechanical properties was employed as ceramic molds for casting metal like aluminium (Al) or iron (Fe) over their molten temperature. The micro-structural observation on the interface of ceramic/metal was conducted using analytical electron microscopy and the diffusion of metallic particles into Y2Ti2O7 was investigated using energy dispersive X-ray spectroscopy.
AB - The deterioration, caused by surface corrosion occurring at high temperatures, of the shell of casting mold costs the manufacturing industry great losses annually. When the demand for finding new materials for the shell is crucial, the yttria-based ceramic Y2Ti2O7 possessing superior hardness, thermal-creep and corrosion resistance is a potential candidate. In this study, Y2O3 and TiO2 powders were mixed in 1:2 of mole ratio to synthesize Y2Ti2O7 powder, which was then used to sinter ceramic plates by hot-pressing method. Depending on the particle size of starting material, various types of Y2Ti2O7 were sintered with variation in density, hardness, flexural strength and fracture toughness. The one having the best mechanical properties was employed as ceramic molds for casting metal like aluminium (Al) or iron (Fe) over their molten temperature. The micro-structural observation on the interface of ceramic/metal was conducted using analytical electron microscopy and the diffusion of metallic particles into Y2Ti2O7 was investigated using energy dispersive X-ray spectroscopy.
UR - https://www.scopus.com/pages/publications/84908214876
U2 - 10.1002/9781118996652.ch6
DO - 10.1002/9781118996652.ch6
M3 - Conference contribution
AN - SCOPUS:84908214876
T3 - Ceramic Transactions
SP - 53
EP - 63
BT - Advances in Materials Science for Environmental and Energy Technologies III
A2 - Ohji, Tatsuki
A2 - Matyas, Josef
A2 - Manjooran, Navin Jose
A2 - Pickrell, Gary
A2 - Jitianu, Andrei
PB - American Ceramic Society
T2 - Advances in Materials Science for Environmental and Energy Technologies III - Materials Science and Technology 2013 Conference and Exhibition, MS and T 2013
Y2 - 27 October 2013 through 31 October 2013
ER -