Effect of high energy milling on the microstruture and properties of wc-ni composite

Abstract

Hard metal is a composite material used in several areas of machining, mining and construction. It can be applied directly on oil and gas drilling equipment components. The main objective of this work was to apply a high energy milling technique to produce the WC-Ni composite and study the effects of milling time in the material properties. The milling of hard metal WC-20Ni, was performed for milling times of 1, 2, 4, 8, 16, 32 and 64 hours. The starting powders were characterized by laser sedigraphy, SEM and EDS. Microstrutural analysis of the sintered samples was performed by optical microscopy, microhardness and density by Archimedes. The best results for the WC-20%Ni composite were achieved for 8 hours milling, where the density and hardness reached 97.09% and 1058 ± 54 HV, respectively, after sintering.

Influence of sintering temperature on microstructure and mechanical properties of WC-8Ni cemented carbide produced by vacuum sintering

“…Numerous studies on the effect of composition, powder size on the properties of cemented carbide have been done and reported [16][17][18]. In contrary, a very limited number of studies investigating the effect of manufacturing parameters on the properties and microstructure of this material have been performed.…”

Morphology and Mechanical Properties of Al- TiC Nanocomposite Processed via Ball Milling Technique

“…Also, the presence of hard ceramic Al4C3 phase lowers the wettability with Al particles which causes a gap that leads to the formation of pores and voids decreases the density [3]. This restricts the densification due to decreasing the backing ability of the powder owing to increasing the deformation and hardening of the particles [37]. Therefore, increasing the milling time has a detrimental effect on densification, for 20 wt.…”

“…/doi.org/ 10.21608/ijmti.2021.181121 wall, which produces impact energy that is sufficient for the fracture of the brittle TiC particles into the nanoscale enhances the distribution of TiC particles in Al matrix. The fine brittle TiC particles are distributed on the softer Al particles with no agglomeration of voids[37].…”

Mechanical and Thermal Behavior of Recycled Low-Density Polyethylene Composites with Coal Mining Waste

“…An efficient polymer/CMW interface will enable increasing the mechanical characteristics of the composites (Torres and Schaeffer 2010). According to Iwakiri et al (2000), the rupture usually occurs in the sampling plane corresponding to the region of lower density and thus less union between the particles and the polymer.…”