Production of aluminum nanoparticles by wet mechanical milling
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MRS Advances © The Author(s), 2020, published on behalf of Materials Research Society by Cambridge University Press DOI: 10.1557/adv.2020.388
Production of aluminum nanoparticles by wet mechanical milling S. Mancillas-Salasa, P. Hernández-Rodrígueza,b, A.C. Reynosa-Martíneza, E. López-Honoratoa,* a
Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV), Unidad Saltillo, AV. Industria Metalúrgica 1062, Ramos Arizpe, 25900, México
b
Instituto Tecnológico Superior de Loreto. Departamento de Investigación y Posgrado. Carretera Tierra Blanca-Loreto km 22, 98800, Zacatecas, México.
*Corresponding author. E-mail: [email protected]
Abstract
One of the great challenges in the use of nanomaterials is their production at low costs and high yields. In this work aluminum nanoparticles, from aluminum powder, were produced by wet mechanical milling through a combination of different attrition milling conditions such as ball-powder ratio (BPR) and the amount of solvent used. It was observed that at 600 rpm with a BPR of 500/30 g for 12 h, it was possible to produce nanoparticles with a size close to 20 nm, while at 750 rpm with a BPR of 380/12.6 g for 12 h, nanoparticles of approximately 10 nm were obtained. Scanning and transmission electron microscopy confirmed that the milling product is an agglomeration of nanoparticles with different sizes. These results show the feasibility of obtaining aluminum nanoparticles by mechanical milling using only ethanol as solvent, avoiding hazardous by-products obtained from chemical routes, and the use of complicated methods such as laser ablation and arc discharge.
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INTRODUCTION The development of nanotechnology has opened a wide range of applications of nanomaterials. Aluminum, as a material, is of great interest in a wide range of applications due to its low cost, corrosion resistance, lightweight and mechanical properties [1, 2]. After turning it into nanometric size other properties as high electrical and thermal conductivities are also highlighted endowing aluminum nanoparticles with great potential in terms of applications [3]. Aluminum nanoparticles can be employed in many applications i.e. as oxidative coatings [4], as filler to avoiding shrinkage in pyrolysis processes for the production of polymer derived ceramics [5], as material for nanofluids [6], as an enhancer of tribological properties [7] and also as a food additive to avoid microbial growth [8]. Other reported uses are for fireworks and combustible additives [9, 10]. Aluminum nanoparticles are commonly produced by processes such as laser ablation [11-14], catalytical synthesis [9], electrochemical processes [3, 15], mechanical milling [16], among others. Mechanical milling is a technique that can be used for alloying metals, a process that is referred as mechanical alloying, wh
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