Influence of Milling parameters in the morphology of nanostructured CrC-30wt%NiCr

Abstract

Nanostructured CrC-30wt%NiCr powders were synthesized by high energy ball milling in a planetary ball mill. Two ball-topowder ratios, four milling times and two milling speeds were used. Morphology, average grain diameter, and phase transformation of the powders were characterized by scanning electron microscopy (SEM), particle size analysis, and X-ray diffraction (XRD). Crystallite size and mean diameter decrease with increase in BPR, milling time and speed. The results show that with the use of a ballto-powder weight ratio of 1:20, a milling time of 1h and a milling speed of 500 rpm, the average particle size and crystallite size were respectively 5.6 µm and 8.3 nm.

Synthesis, Characterization and Application by HVOF of a WCCoCr/NiCr Nanocomposite as Protective Coating Against Erosive Wear

“…The WCCoCr particles lost their starting morphology and had their size significantly reduced in the first hours of milling. Significant modifications in the powders morphology were also detected by [33,38,51]. WCCoCr milled for 6 h (Fig.…”

“…Nanostructured powders produced by MA possess physical and mechanical properties different from those of materials prepared by conventional techniques [28]. MA is a high-energy ball milling technique used to produce a variety of materials, such as borides, carbides, nitrides, oxides and nanocomposites [29][30][31][32][33]. Many studies have been conducted about WCCo nanocomposites obtained by high energy ball milling [34][35][36][37][38][39][40].…”