Pressure Aided Sintering of Ultrafine Powders of WC with Addition of Co

L.H.F. Borges; H.C.P. Oliveira; R.S. Guimarães; T. Kobayashi; Marcello Filgueira

doi:10.4028/www.scientific.net/MSF.591-593.308

Paper Titles

Effect of High Energy Milling Parameters on Nanostructured Cr₃C₂-Ni20Cr Powder Characteristics
p.282

Hydrogen Addition Effect on 3D Porous Titanium Produced by Powder Metallurgy
p.289

Effect of the Dispersion of Nanosized Carbides (NbC - TaC) in the Sintered Microstructure of the Stainless Steel 316L
p.294

New Method of Controlling the Carbon Content of High Chromium Alloyed Powders during High Temperature Sintering
p.300

Pressure Aided Sintering of Ultrafine Powders of WC with Addition of Co
p.308

Metallography Parameters Study of Fe-6.5_wtSi Alloy Obtained by Spray Forming
p.315

The Study of the Particles Size Influence on the Venturi Scrubbers Perfomance
p.322

Identification of the Spouted Bed Flow Regime by Simulation and Experimental Data
p.329

Minimum Fluidization Velocity of Fine Particles
p.335

HomeMaterials Science ForumMaterials Science Forum Vols. 591-593Pressure Aided Sintering of Ultrafine Powders of...

Pressure Aided Sintering of Ultrafine Powders of WC with Addition of Co

Abstract:

Hardmetal alloys are processed by liquid phase sintering, which consist of one refractory carbide, embebided in to a tough matrix of Co. These alloys extensively are used in applications that demand abrasion resistance and high hardness. The present work has as objective to analyze the sintering of ultrafine powders of tungsten carbide (WC) with the addition of 10%wtCo. The alloys had been prepared by using high pressure and high temperature technique. The sintering of the WC/10%pCo alloy was processed at the 3, 4 and 5 GPa, in temperatures of 1300,1400 and 1500°C, during 2 and 4 minutes. The analysis was made by microstructure, densification, structure, Vickers hardness and fracture toughness. The best results was density = 98.9%, hardness HV30 =10,77GPa and fracture toughness KIC = 15,57 MPa.m1/2.