Phase Transformation on Interface Between NiCoCrA1Y Bond Coat and Substrate and Study of Thermal Barrier Coating as High Temperature Material  

Oleh:

Purwaningsih, H. ; Noerochim, L. ; Fajarain, R. ; Hakim, J.A. ; Sulistijono

Jenis: Article from Journal - ilmiah nasional - terakreditasi DIKTI
Dalam koleksi: IPTEK: The Journal for Technology and Science vol. 21 no. 4 (Nov. 2010), page 197-202.
Topik: Thermal Fatigue; Phase Transformation; Bond Coat NiCoCrAlY; Substrate NiCoCrAlY

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: MM48 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Thermal Barrier Coating material consists of Yttria stabilized zirconia (YSZ) as a top coat and bond coat NiCoCrAlY. It is used to protect NiCoCrAlY super alloys for high temperature applications due to its corrosion resistant properties and resistance to thermal fatigue. In the present study, top coat and bond coat were deposited on the substrate using plasma spraying process, followed by thermal fatigue treatment, by heating up to 900 degrees for 5 hours and cooling down to 25 degrees for 15 minutes, this process called one cycle. Thermal fatigue was conducted until the material failure. Electron microscope was used to analysis micro-structure of the sample after thermal fatigue and x-ray diffraction to analysis phase changed on the interface between bond coat and substrate. The result showed that the specimens failed at 42 cycles (210 hours). A new phase identified as Ni3Al was formed.

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