TY - JOUR
T1 - Mechanical properties evaluation method for non-stoichiometric materials under high temperature and oxidizing/reducing conditions
AU - Watanabe, Satoshi
AU - Sato, Kazuhisa
AU - Takeyama, Yohei
AU - Iguchi, Fumitada
AU - Yashiro, Keiji
AU - Amezawa, Koji
AU - Yugami, Hiroo
AU - Hashida, Toshiyuki
AU - Mizusaki, Junichiro
AU - Kawada, Tatsuya
PY - 2011
Y1 - 2011
N2 - For the commercialization of solid oxide fuel cell (SOFC), in addition to the electrochemical reliability, it is also important to ensure the mechanical reliability of SOFC. Thus, the establishment of a suitable mechanical testing method under various temperatures and oxygen partial pressure conditions is a prerequisite for the development of reliable SOFCs. In this study, the in-situ mechanical testing method was developed in order to investigate mechanical property (i.e.: Elastic modulus and Fracture strength, Creep and Fatigue property) of solid oxide fuel cells components under high oxidizing/reducing environments. And mechanical property of gadolinium doped ceria (Gd 0.1Ce 0.9O 2-δ; GDC) as oxygen non-stoichiometric compounds were evaluated in oxygen partial pressures under reducing conditions by developed In-situ mechanical testing machine. The experimental results of the investigation of elastic modulus and fracture strength on the SOFC components, the fracture stress of GDC were almost constant regardless of oxygen partial pressure, while elastic modulus decreased with decreasing oxygen partial pressure in reducing atmospheres. Mechanical properties of SOFC materials should be characterized by in-situ method because these results are different to quench method.
AB - For the commercialization of solid oxide fuel cell (SOFC), in addition to the electrochemical reliability, it is also important to ensure the mechanical reliability of SOFC. Thus, the establishment of a suitable mechanical testing method under various temperatures and oxygen partial pressure conditions is a prerequisite for the development of reliable SOFCs. In this study, the in-situ mechanical testing method was developed in order to investigate mechanical property (i.e.: Elastic modulus and Fracture strength, Creep and Fatigue property) of solid oxide fuel cells components under high oxidizing/reducing environments. And mechanical property of gadolinium doped ceria (Gd 0.1Ce 0.9O 2-δ; GDC) as oxygen non-stoichiometric compounds were evaluated in oxygen partial pressures under reducing conditions by developed In-situ mechanical testing machine. The experimental results of the investigation of elastic modulus and fracture strength on the SOFC components, the fracture stress of GDC were almost constant regardless of oxygen partial pressure, while elastic modulus decreased with decreasing oxygen partial pressure in reducing atmospheres. Mechanical properties of SOFC materials should be characterized by in-situ method because these results are different to quench method.
KW - Functional oxide
KW - In-situ mechanical testing method
KW - Non-stoichiometry
KW - Oxygen partial pressure
KW - Oxygen vacancy (defect)
KW - Solid oxide fuel cell (SOFC)
UR - http://www.scopus.com/inward/record.url?scp=84863082753&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84863082753&partnerID=8YFLogxK
U2 - 10.1299/kikaia.77.1357
DO - 10.1299/kikaia.77.1357
M3 - Article
AN - SCOPUS:84863082753
VL - 77
SP - 1357
EP - 1366
JO - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
JF - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
SN - 0387-5008
IS - 780
ER -