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Production of Al 2 O 3 ‐Stabilized Tetragonal ZrO 2 Nanoparticles for Thermal Barrier Coating
Author(s) -
Karthik Arumugam,
Manivasakan Palanisamy,
Arunmetha Sundaramoorthy,
Yuvakkumar Rathinam,
Rajendran Venkatachalam
Publication year - 2013
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12032
Subject(s) - materials science , coating , nanoparticle , scanning electron microscope , tetragonal crystal system , silicate , thermal barrier coating , chemical engineering , zirconium , composite material , nanotechnology , metallurgy , crystallography , crystal structure , chemistry , engineering
Al 2 O 3 ‐stabilized tetragonal ZrO 2 nanoparticles were obtained through hot‐air spray pyrolysis and characterized after postsynthesized treatments. The produced nanoparticles were 26 nm in size with surface area of 59 m 2 /g. A multilayer thermal barrier coating of nanostructured Al 2 O 3 ‐ZrO 2 ‐embedded silicate was applied to the mild steel ( EN 3) specimen using spin‐coating technique and characterized comprehensively employing X‐ray diffraction and scanning electron microscope. The Al 2 O 3 ‐stabilized ZrO 2 with silicate matrix facilitates the formation of zirconium silicate nanostructured surface‐protective coating on EN 3 specimen. The Al 2 O 3 ‐ZrO 2 /SiO 2 matrix‐based hybrid inorganic coating shows effective thermal barrier for EN 3 after firing at a high temperature of 600°C.