TY - JOUR
T1 - Wear performance of spark plasma sintered Co/WC and cBN/Co/WC composites
AU - Yaman, Bilge
AU - Mandal, Hasan
PY - 2014
Y1 - 2014
N2 - The present study investigates the efficiency of spark plasma sintering (SPS) technique on the tribological behavior of tungsten carbide composites, and aims to develop the wear resistance of these composites by addition of cubic boron nitride (cBN). Wear tests of spark plasma sintered 6(wt.%)Co/WC, 25(vol%)cBN/6Co/WC and conventionally fabricated 6(wt.%)Co/WC as a reference sample were performed by ball-on-disk contact with dry and rotational sliding at room temperature in order to determine the friction coefficient and wear rate. Wear mechanisms were explained by using SEM observations and the wear rates were computed by a surface profilometer. In all cases, the major wear mechanisms were observed gradually in the form of microcraking, material removal by grain pull out, and generation and spalling of a tribochemical layer. Based on the experimental results, the addition of cBN considerably enhanced the wear resistance of tungsten carbides. In addition, these results revealed that SPS process has outstanding potential for the fabrication of tungsten carbides with high wear properties for tribological applications.
AB - The present study investigates the efficiency of spark plasma sintering (SPS) technique on the tribological behavior of tungsten carbide composites, and aims to develop the wear resistance of these composites by addition of cubic boron nitride (cBN). Wear tests of spark plasma sintered 6(wt.%)Co/WC, 25(vol%)cBN/6Co/WC and conventionally fabricated 6(wt.%)Co/WC as a reference sample were performed by ball-on-disk contact with dry and rotational sliding at room temperature in order to determine the friction coefficient and wear rate. Wear mechanisms were explained by using SEM observations and the wear rates were computed by a surface profilometer. In all cases, the major wear mechanisms were observed gradually in the form of microcraking, material removal by grain pull out, and generation and spalling of a tribochemical layer. Based on the experimental results, the addition of cBN considerably enhanced the wear resistance of tungsten carbides. In addition, these results revealed that SPS process has outstanding potential for the fabrication of tungsten carbides with high wear properties for tribological applications.
KW - Cubic boron nitride
KW - Spark plasma sintering technique
KW - Tungsten carbide composites
KW - Wear resistance
UR - http://www.scopus.com/inward/record.url?scp=84887470046&partnerID=8YFLogxK
U2 - 10.1016/j.ijrmhm.2013.10.010
DO - 10.1016/j.ijrmhm.2013.10.010
M3 - Article
AN - SCOPUS:84887470046
SN - 0263-4368
VL - 42
SP - 9
EP - 16
JO - International Journal of Refractory Metals and Hard Materials
JF - International Journal of Refractory Metals and Hard Materials
ER -