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E. A. Basuki
Department of Metallurgical Engineering, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
Astronomy Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering

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The Interdiffusion Modeling of Aluminide Coated Ti-47Al-2Cr-2Nb-0.5Zr-0.5Y Intermetallic Alloy F. Muhammad; E. A. Basuki; M. I. Juliansyah
Indonesian Journal of Physics Vol 26 No 1 (2015): Vol. 26 No. 1, July 2015
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1087.631 KB) | DOI: 10.5614/itb.ijp.2015.26.1.4

Abstract

In the present study, the interdiffusion behavior between coating layer and substrate of aluminide coated Ti- 47Al-2Cr-2Nb-0.5Zr-0.5Y intermetallic alloy were investigated at 800°C, 900°C, and 1000°C under argon atmosphere (closed system). The pack cementation, consists of 20%-wt. Al, 2%-wt. NH4Cl, and 78%-wt. Al2O3, was carried out at 900°C for 10 hours. The phases in the coatings, interdiffusion layer, and substrate were examined using optical microscope and scanning electron microscope (SEM) while the chemical composition were examined by Energy Dispersive X-Ray Spectroscopy (EDS) attached on the SEM. The interdiffusion coefficients were calculated according to Boltzmann-Matano method using the data obtained from EDS analyses. The calculated interdiffusion coefficients are 7.091 x 10-14, 1.650 x 10-12, and 5.261 x 10-12 cm2/s respectively for 800°C, 900°C, and 1000°C. The analytical and numerical method to predict the concentration profiles between coating layer, interdiffusion layer, and substrate. A reasonable agreement has been achieved between the experimental results and the simulated concentration profiles at every temperatures.
Co-Authors F. Muhammad M. I. Juliansyah