Effects of WC particle size on sintering behavior and mechanical properties of coarse grained WC–8Co cemented carbides fabricated by unmilled composite powders

EFFECT OF COARSE-TO-FINE WC GRAIN RATIO ON MECHANICAL PROPERTIES AND ABRASIVE WEAR OF WC-8Co CEMENTED CARBIDES

“…These results, along with their mechanical properties, seem to contradict the established research in WC-Co strength and grain size distribution. Typically, the low contiguity and narrower (more uniform) range of grains means that stresses and elastic energies from fractures are evenly distributed across the microstructure and leading to improved strength [L. 22,30]. In our case, the wider distribution of grains seems to show improved mechanical properties in samples B2 and B2A.…”

“…This is characterised by slip lines across the coarse WC-Co cemented carbides. It is believed that the plastic deformation and rupture of the Co binder phase ligaments contributes the major portion of the dissipative work during the rupture of WC-Co cemented carbides due to its high value of the critical strain energy release rate [L. 22,25,26]. This would explain the result with sample B2 having both high TRS and fracture toughness values as seen in Fig.…”

Influence of powder particles shape and size on the sintered austenitic stainless steel

“…Both porosity and density depend on the size and shape of particles, as well as on applied compaction pressure (among other things). Moreover, in the other research, it was shown that the particle size influences the sintering process as well as properties of ready-made parts (Ertugrul et al, 2016;Kováčová et al, 2016;Menapace et al, 2016;Shongwe et al, 2016;Sun et al, 2015). The aim of this work is to investigate the influence of shape and size of powders as well as of compacting pressure on the porosity, density, surface roughness and corrosion resistance of the 316L stainless steel sinters.…”

Particle Size-Dependent Microstructure, Hardness and Electrochemical Corrosion Behavior of Atmospheric Plasma Sprayed NiCrBSi Coatings

“…studied the effects of particle size and structure on the preferential Ce evaporation for La 2 Ce 2 O 7 particles during plasma spraying and indicated that the evaporation loss of Ce is significantly influenced by particle size, thereby affecting the properties of the as-sprayed La 2 Ce 2 O 7 coatings. Sun et al [16] used different-sized WC powders to sinter three sets of WC-8Co cemented carbides and found that the transgranular fractures of the prepared cemented carbides are more evident with increasing WC particle size. From all this one can conclude that powder appearance potentially influences the properties and therefore the end applications of the produced products.NiCrBSi alloy coatings are also commonly prepared by metallic powder-related techniques including spraying [17,18] and laser cladding [19,20], with the aim to produce barriers to protect substrates from wear and/or corrosion.…”