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Thermal Cycling Fatigue of Thermal Barrier Coatings- Rig and Experiment Design
Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial.
Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Konstruktionsmaterial. Linköpings universitet, Tekniska högskolan.
GKN Aerospace Engine Systems, Trollhättan.
Vise andre og tillknytning
2014 (engelsk)Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Ceramic thermal barrier coatings are used for thermal insulation in gas turbines to protect metallic components from high-temperature degradation. The ceramic coating may, due to its different coefficient of thermal expansion, crack and spall off the metallic component, thus rendering the component unprotected against high-temperature. Thermal cycling rigs of various designs are used to evaluate the durability of thermal barrier coatings. The present paper reports the result from a round robin test including three thermal cycling rigs at different locations. To better understand the influence of rig design on the thermal cyclic lives of thermal barrier coatings, some test parameters, such as the material of the specimen table and the cooling rate, were varied in one of the rigs. Furthermore, two different specimen geometries, rectangular and disc-shaped, were tested. The specimen table material was found to greatly influence the cooling rate of the specimens, more so than variations in the cooling airflow. The rectangular specimens were found to be more sensitive to test setup than the disc-shaped specimens; under certain conditions, the rectangular specimens could be made to fracture from the long side, rather than the short side of the specimen edge, which shortened the thermal cyclic life of the coatings.

sted, utgiver, år, opplag, sider
Trans Tech Publications Inc., 2014. Vol. 891-892, s. 641-646
Emneord [en]
thermal barrier coating, TBC, thermal cycling, rig, test parameters, round robin
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-104662DOI: 10.4028/www.scientific.net/AMR.891-892.641ISI: 000337767700100OAI: oai:DiVA.org:liu-104662DiVA, id: diva2:698138
Konferanse
Fatigue 2014 11th International Fatigue Congress, Melbourne, Australia, 2-7 March, 2014.
Tilgjengelig fra: 2014-02-20 Laget: 2014-02-20 Sist oppdatert: 2014-12-10

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