Obtaining of tungsten nanopowders by high energy ball milling

Abstract

The objective of the work is identifying the modes of ball milling of the W16,5 and PWT grade tungsten that ensure obtaining nanosized powders. Milling was performed with the AGO-2U planetary-centrifugal mill for 5, 15, 60, and 120 min at the carrier rotation frequencies of 400, 800, and 1000 rpm. After milling, the shape and size of tungsten powder particles was studied by scanning electron microscopy. The effect of work hardening and aggregation on milling of the powders has been demonstrated. As a result of ball milling, nanoparticles of tungsten sized from 25 nm have been obtained. It has been found that the minimum size of particles is achieved at the carrier rotation frequency of 800 rpm and milling duration of not less than 60 min.

In vitro analysis of the cytotoxic effect of two different sizes ITER-like tungsten nanoparticles on human dermal fibroblasts

“…Until the ITER reactor becomes operating to have ITER-derived WNPs, ITER-like nanoparticles were synthesized using a cluster source based on the MSGA method. This method has the advantage of being similar with the particle production in fusion reactors and also it assures a high chemical purity of the obtained nanoparticles using a small number of precursors [ 30 , [35] , [36] , [37] ].…”

The Effect of Tungsten Nanoparticles on the Hardness of Sintered Sn-Cu-Co-W Alloys

“…Tungsten powder was milled using the AGO-2U planetary-centrifugal mill at 800 RPM rotation frequency for 1 hour. The said milling mode ensures obtaining tungsten nanoparticles sized across 25 nm and above [26]. Next, powdered mixtures were prepared the composition of which is given in Table 1.…”