Optimized production route of WC powder pre-alloyed with Ta for fine grained cemented carbides
Journal article, 2017

Powders of hexagonal (W,Ta)C were produced following a two-step carburization process with (W,Ta)(2)C powder as an intermediate product XRD measurements indicate that higher temperatures during the first carburization step increase the fraction of Ta in the (W,Ta)(2)C structure where lower temperatures during the second carburization step seems to increase the fraction of Ta in the (W,Ta)C structure. Lower temperatures during the carburization steps increase the fraction of Sigma 2 WC/WC grain boundaries and cause the formation of what is interpreted as Sigma 4 boundaries. The (W,Ta)C powders can be successfully used to produce fine grained WC-Co based cemented carbides. The pre-alloying with Ta appears to have a softening effect on the material.

Electron backscatter diffraction

SEM

Doping

Scanning electron microscopy

EBSD

Author

Jonathan Weidow

Chalmers, Physics

E. Halwax

Vienna University of Technology

W. D. Schubert

Vienna University of Technology

International Journal of Refractory Metals & Hard Materials

2213-3917 (eISSN)

Vol. 62 Part B, Special Issue 97-103

Subject Categories

Chemical Sciences

DOI

10.1016/j.ijrmhm.2016.05.012

More information

Latest update

3/2/2018 7