Abstract
In this research, Ba-hexaferrite coatings for electromagnetic wave
absorption applications were deposited by thermal spraying. A suitable
powder feedstock was manufactured by blending a BaCO3 + Fe2O3
mixture, which was then agglomerated by spray-drying. The agglomerates
were processed by air plasma spraying (APS) without any further
treatment or were heat-treated and reactively-sintered to stoichiometric
Ba-hexaferrite prior to spraying. As-sprayed coatings were analyzed by
Raman spectroscopy and X-ray diffraction (XRD). Whereas the deposition
of untreated agglomerates did not result in adequate amounts of
crystalline Ba-hexaferrite in the coatings, the APS processing of
reactively-sintered agglomerates led to a high content of Ba-hexaferrite
and similar magnetic properties to those of Ba-hexaferrite bulk
materials.
Original language | English |
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Pages (from-to) | 1015-1020 |
Journal | Surface and Coatings Technology |
Volume | 205 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2010 |
MoE publication type | A1 Journal article-refereed |
Event | 4th Workshop RIPT (Les Rencontres Internationales sur la Projection Thermique) - Lille, France Duration: 2 Dec 2009 → 4 Dec 2009 |
Keywords
- APS spraying
- Ba-hexaferrite coatings
- Electromagnetic properties
- Micro-Raman spectroscopy
- Vibrating sample magnetometer
- X-ray diffraction