Characterization of Mo–Si–B Nanocomposite Powders Produced Using Mechanical Alloying and Powder Heat Treatment

Li, Bin; Zhang, Guojun; Jiang, F.; Ren, Shuai; Liu, Gang; Sun, Jun

doi:10.1016/j.jmst.2015.07.007

Cited by 13 publications

(1 citation statement)

References 18 publications

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“…Figure 4 shows the particle sizes (d 50 ) for V-9Si-13B and Mo-9Si-8B powders for different milling trials. The increase of the powder particle size during the initial time of the mechanical alloying process can be explained by a significant deformation of the particles, accompanied with the formation of fresh surfaces and subsequent cold welding processes, specifically of the ductile components V and Mo in the V-9Si-13B and Mo-9Si-8B powder compositions as also observed in [34,42,43]. These effects are also expressed in the micrographs shown in Figure 3.…”

Section: Particle Size and Morphologymentioning

confidence: 73%

Similarities and Differences in Mechanical Alloying Processes of V-Si-B and Mo-Si-B Powders

Krüger

Schmelzer

Helmecke

2016

Metals

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V-Si-B and Mo-Si-B alloys are currently the focus of materials research due to their excellent high temperature capabilities. To optimize the mechanical alloying (MA) process for these materials, we compare microstructures, morphology and particles size as well as hardness evolution during the milling process for the model alloys V-9Si-13B and Mo-9Si-8B. A variation of the rotational speed of the planetary ball mill and the type of grinding materials is therefore investigated. These modifications result in different impact energies during ball-powder-wall collisions, which are quantitatively described in this comparative study. Processing with tungsten carbide vials and balls provides slightly improved impact energies compared to vials and balls made of steel. However, contamination of the mechanically alloyed powders with flaked particles of tungsten carbide is unavoidable. In the case of using steel grinding materials, Fe contaminations are also detectable, which are solved in the V and Mo solid solution phases, respectively. Typical mechanisms that occur during the MA process such as fracturing and comminution are analyzed using the comminution rate K P . In both alloys, the welding processes are more pronounced compared to the fracturing processes.

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