Effect of CaF₂ in Precursors on Steel Pipe Lined Fe-Al Intermetallic-TiB₂-Al₂O₃ Composite Coating by Centrifugal-SHS Process

Abstract:

Steel pipe lined Fe-Al intermetallic-TiB₂-Al₂O₃ composite were prepared by centrifugal-self-propagating high temperature synthesis (centrifugal-SHS) process from FeTiO₃, B₂O₃, Fe₂O₃, Al and CaF₂ as raw materials. The standard Gibbs energy minimization method was used to calculate the equilibrium compositions of the reacting species. The effect of adding CaF₂ to the precursors on the result product were investigated. The phase separation between less porosity Fe-Al intermetallics-TiB₂ with Al₂O₃ layer were affected greatly by adding CaF₂. The phase compositions and morphology were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM) couple with energy dispersive X-ray (EDX), respectively.

• Periodical: Advanced Materials Research (Volumes 488-489)
• Pages: 468-472
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.488-489.468
• Online since: March 2012
• Authors: Pajaree Kerdkool, Niyomwas Sutham
• Keywords: Centrifugal-SHS, Ceramic-Lined Pipe, Composite Pipe, Fe-Al Intermetallic-TiB₂-Al₂O₃ Composite

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