Fluorescent cobalt ferrite nanoparticles for non-destructive magnetic particle testing

Magnetic particle testing is one of the popular methods to detect very small surface or near-surface defects in engineering parts. Successful defect detection depends on the physical properties of the particles. This work aims to synthesize cobalt ferrite-fluorescent polymer particles to detect fine...

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Bibliographic Details
Published in:Journal of materials research 2024-09, Vol.39 (17), p.2469-2481
Main Authors: Baharlouei, Z., Enayati, M. H., Nahvi, S. M.
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Biomaterials
Chemistry and Materials Science
Inorganic Chemistry
Materials Engineering
Materials Science
Nanotechnology
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Summary:Magnetic particle testing is one of the popular methods to detect very small surface or near-surface defects in engineering parts. Successful defect detection depends on the physical properties of the particles. This work aims to synthesize cobalt ferrite-fluorescent polymer particles to detect finer defects located in deeper places. For this purpose, cobalt ferrite (CoFe 2 O 4 ) nanoparticles were synthesized and the next step, fluorescence pigment was incorporated into CoFe 2 O 4 nanoparticles. X-ray diffraction (XRD), scanning electron microscopy (SEM), vibration magnetometer (VSM), and Fourier transform infrared spectroscope (FTIR) were used to examine the effects of various parameters. CoFe 2 O 4 nanoparticles with a size of about 55 nm and suitable magnetic properties were chosen. The presence of pigment reduced the saturation magnetization to 25.17 emu/g, although this value is still within the suitable range. Finally, the stability of the pigment on CoFe 2 O 4 nanoparticles in water was investigated, and synthesized nanocomposite was successfully used to reveal defects. Graphical abstract
ISSN:0884-2914
2044-5326
DOI:10.1557/s43578-024-01396-4