NDLI: Characterization of Nanostructured NbSi$_{2}$ Intermetallic Coatings Obtained by Plasma Spraying of Mechanically Alloyed Powders

Content Provider	Springer Nature Link
Author	Yazdani, Zohreh Karimzadeh, Fathallah Abbasi, Mohammad Hasan
Copyright Year	2015
Abstract	Nanostructured NbSi$_{2}$ powders plasma sprayed on to Ti-6Al-4V substrates were characterized in this research. After preparation of the nanostructured NbSi$_{2}$ powders by mechanical alloying of an Nb–Si powder mixture, agglomeration was performed to obtain a particle size suitable for spraying. The agglomerated powders were then sprayed by atmospheric plasma spraying. Structural transformation of the powders and morphological and mechanical changes of the coatings were examined by use of x-ray diffraction analysis, scanning electron microscopy, energy dispersive spectroscopy, and microhardness testing. During milling, NbSi$_{2}$ intermetallic with a grain size of approximately 15 nm was gradually formed. After plasma spraying, a coating of hardness 550 ± 8 HV with a uniform nanocrystalline structure, low oxide content, low porosity, and a good adhesion to the substrate was obtained. No phase change occurred after spraying and the NbSi$_{2}$ compound remained nanostructured with a grain size of approximately 82 nm.
Starting Page	947
Ending Page	952
Page Count	6
File Format	PDF
ISSN	10599630
Journal	Journal of Thermal Spray Technology
Volume Number	24
Issue Number	6
e-ISSN	15441016
Language	English
Publisher	Springer US
Publisher Date	2015-07-24
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	coating materials intermetallics mechanical alloying nanostructured plasma spray Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings Characterization and Evaluation of Materials Operating Procedures, Materials Treatment Analytical Chemistry
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Materials Chemistry Condensed Matter Physics

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