TY - GEN
T1 - Role of process conditions on the interfacial fracture toughness of plasma sprayed zirconia
AU - Okajima, Y.
AU - Nakamura, T.
AU - Sampath, S.
PY - 2012
Y1 - 2012
N2 - Adhesive strength of the plasma-sprayed thermal barrier coating (TBC) is one of the most important parameters which influence the reliability during service. In the past, numerous test methods are reported to measure the coating adhesion. However, most of them require careful and time consuming preparation. Consequently, limited information could be obtained to establish the relationship between the processing conditions and the adhesive property. To produce more measurements using a simpler procedure, the interfacial indentation test and the modified tensile adhesive test are examined. In this paper, the interfacial fracture toughness of the plasma-sprayed ZrO2 coatings, deposited on Al substrates, were evaluated by these two tests. In order to study the effects of the powder injection, samples were sprayed with various carrier gas flow rates. The test results show a certain correlation between the melting index and the interfacial fracture toughness. In addition, variations between the results obtained from the two different methods are discussed.
AB - Adhesive strength of the plasma-sprayed thermal barrier coating (TBC) is one of the most important parameters which influence the reliability during service. In the past, numerous test methods are reported to measure the coating adhesion. However, most of them require careful and time consuming preparation. Consequently, limited information could be obtained to establish the relationship between the processing conditions and the adhesive property. To produce more measurements using a simpler procedure, the interfacial indentation test and the modified tensile adhesive test are examined. In this paper, the interfacial fracture toughness of the plasma-sprayed ZrO2 coatings, deposited on Al substrates, were evaluated by these two tests. In order to study the effects of the powder injection, samples were sprayed with various carrier gas flow rates. The test results show a certain correlation between the melting index and the interfacial fracture toughness. In addition, variations between the results obtained from the two different methods are discussed.
UR - https://www.scopus.com/pages/publications/84873380419
M3 - Conference contribution
AN - SCOPUS:84873380419
SN - 9781632666796
T3 - Proceedings of the International Thermal Spray Conference
SP - 178
EP - 183
BT - International Thermal Spray Conference and Exposition, ITSC 2012 - Air, Land, Water and the Human Body
PB - ASM International
T2 - International Thermal Spray Conference and Exposition - Air, Land, Water and the Human Body: Thermal Spray Science and Applications, ITSC 2012
Y2 - 21 May 2012 through 24 May 2012
ER -