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The preparation of hard and super‐hydrophilic MgB 2 coating by spray pyrolysis deposition
Author(s) -
Bülbül F.,
Jafarpour S.,
Ertuğrul M.
Publication year - 2016
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201600454
Subject(s) - materials science , scanning electron microscope , indentation hardness , crystallite , chemical engineering , thermal spraying , microstructure , contact angle , sodium hypophosphite , crystallization , coating , metallurgy , composite material , electroplating , layer (electronics) , engineering
In this study, we report spray pyrolysis deposition using an alternative precursor solution for the fabrication of MgB 2 films. Polycrystalline MgB 2 films were prepared by spray pyrolysis, a precursor solution of magnesium diboride nanoparticles, sodium hypophosphite, sodium succinate, sodium acetate and dimethyl sulfoxide on AZ91 magnesium alloys. The spray was carried out using argon as carrier gas at a temperature of 150 °C and a spray rate of 5 ml/min for 60 min. After spraying, the deposited samples were annealed at 300 °C for 15, 30 and 45 min in order to investigate morphological changes and crystallization behaviour. The microstructure, hardness and wettability properties of approximately 30 μm coatings were investigated by X‐ray diffraction, scanning electron microscopy, microhardness tester and contact angle meter. Produced coatings showed dense and homogenous structural formation with strong grain connections. As‐deposited MgB 2 films showed the most pronounced preferred orientation with the (101) reflection and the highest hardness value compared to other annealed coatings at different times. Besides, all the synthesized coatings had a super‐hydrophilic surface.