Fabrication of Ni, Pt, Pt/Ni Nano Powders using Wire Explosion Process and Characterization

Characterization of Cu and Ni Nano-Fluids Synthesized by Pulsed Wire Evaporation Method

“…The sublimation energy values of Cu and Ni are 33 and 53.9 J/mm 3 , respectively [8,14]. It is easily understood from equation 1 that the superheating factor K of Cu is higher than that of Ni due to lower W s of Cu for the same W. Thus, the particle size of Cu is expected to be smaller than that of Ni because the liquid phase or semi solid phase was possibly condensed for Ni.…”

“…Compared to other processes involving several treatment steps, the PWE method has been recently developed to fabricate nano size particles or nanofluids. This process is capable of producing various metal and oxide nanoparticles by charging a starting wire in various gas (dry) and liquid (wet) media [6][7][8][9][10][11]. However, further research is still needed to optimize particle size and dispersibility control, since those properties can be easily affected by several process parameters, such as input voltage, material type, thickness of wire, aqueous media type, etc.…”

Effect of Variation in Voltage on the Synthesis of Ag Nanopowder by Pulsed Wire Evaporation

“…Therefore, scientists have shown great interest to discover new production methods and new application fields of nanopowders [1]. Different methods for fabrication of metal nanopowders have been introduced in recent years, which are often classified into three groups: mechanical process; physical process; chemical process [2]. The chemical process has been widely adopted in production of metal nanopowders.…”

“…In this technique, a high power pulsed dc current passing through a thin metal wire leads to the wire explosion, and the large amount of heat energy causes the wire to melt, followed by subsequent evaporation and formation of plasma. The plasma formed during the process expands and cools when it interacts with a coolant such as an inert gas or liquid, and then nanoparticles are formed through the nucleation process [2,4]. Nowadays, the PWE technique can be used effectively to fabricate metal nanopowders, namely, Ni [2], Fe [3], Al [4], Cu [5], Ag [6], and so forth, or nano-powder alloys, such as Pt-Ni [7], Cu-Ni [8], and Cu-Ni-P [9].…”

“…The plasma formed during the process expands and cools when it interacts with a coolant such as an inert gas or liquid, and then nanoparticles are formed through the nucleation process [2,4]. Nowadays, the PWE technique can be used effectively to fabricate metal nanopowders, namely, Ni [2], Fe [3], Al [4], Cu [5], Ag [6], and so forth, or nano-powder alloys, such as Pt-Ni [7], Cu-Ni [8], and Cu-Ni-P [9]. Among the metal nanopowders, Ag nanopowders have drawn considerable interest and been used in widespread fields, including catalysis, photography, nanophotocatalysis in cosmetics, food, medicine, and antibacterial agents in clothes [1,6].…”