TITLE:
Effect of Cr3C2 and VC on the Mechanical and Structural Properties of Sintered WC-10wt%Co Nano Powders
AUTHORS:
Morteza Mahmoodan, Hamed Aliakbarzadeh, Farzad Shahri
KEYWORDS:
WC-10Co; Cr3C2; VC; Hardness; Fracture Toughness; Grain Size
JOURNAL NAME:
World Journal of Nano Science and Engineering,
Vol.3 No.2,
June
18,
2013
ABSTRACT: The effect of addition of metallic carbides Cr3C2 and Cr3C2 + VC on structure and mechanical properties of WC-10 wt% Co nanocomposites have been studied. After preparing and compacting of the powders under pressure of 200 MPa, the samples were sintered at temperatures of 1370°C, 1410°C and 1450°C for 1 hour. Microstructural examinations by SEM show that the average grain size obtained for Cr3C2 + VC added alloys reduced 50 percent and also grain size distribution was narrower compared to those samples without grain growth inhibitors. Furthermore, co-addition of Cr3C2 and VC rise to a higher Vickers hardness and fracture toughness of the sintered alloys at 1410°C.