Facile manufacture of oxide-free Cu particles coated with oleic acid by electrical discharge machining

• Main Authors: Khilji, Irshad Ahamad, Siti Nadiah, Mohd Saffe, Pathak, Sunil, Chilakamarry, Chaitanya Reddy, Amiril Sahab, Abdul Sani, Reddy, Venugopal Jayarama
• Format: Article
• Language: English
• Published: MDPI 2022
• Subjects: T Technology (General); TJ Mechanical engineering and machinery; TK Electrical engineering. Electronics Nuclear engineering; TP Chemical technology; TS Manufactures
• Online Access: http://umpir.ump.edu.my/id/eprint/35129/1/Facile%20manufacture%20of%20oxide-free%20cu%20particles%20coated%20with%20oleic%20acid%20by%20electrical%20discharge%20machining.pdf; http://umpir.ump.edu.my/id/eprint/35129/; https://doi.org/10.3390/mi13060969; https://doi.org/10.3390/mi13060969
• Institution: Universiti Malaysia Pahang

Particle synthesis has seen significant advances in current trends. However, the synthesis of metal particles without oxidation is a challenge for researchers. The current study presents a straightforward, convenient, and convincing approach for manufacturing copper (Cu) particles free of surface oxide. The die-sink Electrical Discharge Machine (EDM) of copper alloys with oleic acid resulted in the formation of Cu particles with diameters between 10 to 20 µm. X-ray diffraction (XRD) was used for particle examination after cleaning and sonication with distilled water. Cu particles with oleic acid coating retained a Cu phase without oxidation after synthesis. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were used to determine the size and morphology of generated particles. Fourier transforms infrared (FT-IR) analysis revealed the oleic acid-coated Cu surface bonded with an oxygen atom. Also, the agglomeration and change of size involving Cu particles with increasing voltages in the pulse supply in EDM were reported.