TY - JOUR
T1 - Tribological behavior of borided surface on CoCrMo cast alloy
AU - Cuao-Moreu, C. A.
AU - Hernández-Sanchéz, E.
AU - Alvarez-Vera, M.
AU - Garcia-Sanchez, E. O.
AU - Perez-Unzueta, A.
AU - Hernandez-Rodriguez, M. A.L.
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/4/30
Y1 - 2019/4/30
N2 - CoCrMo alloys are used in a wide range of applications because of their acceptable fatigue strength and corrosion resistance. However, CoCrMo-based components exhibit a deleterious effect of wear. For this reason, surface modification through ceramic coatings has become in a useful alternative to improve mechanical resistance. The main aim of the present study was to investigate the tribological behavior of a system of diffusional boride layers formed on the substrate of CoCrMo alloy. For this purpose, different boron diffusion heat treatment parameters were performed: 1223, 1248 and 1273 K by 6, 8 and 10 h, respectively. Surfaces were characterized using scanning electron microscopy (SEM), surface roughness measurement, micro-hardness testing, and X-ray diffraction. The tribological response was studied by means of ball on disc tribometer under dry-sliding conditions tracking their friction coefficient, mass loss, wear rate and surface damage by stereoscopy and SEM. Boride coating at 1223 K by 6 h showed the better wear resistance, increased it 6 times relative to the wear resistance obtained for the CoCr alloy untreated sample.
AB - CoCrMo alloys are used in a wide range of applications because of their acceptable fatigue strength and corrosion resistance. However, CoCrMo-based components exhibit a deleterious effect of wear. For this reason, surface modification through ceramic coatings has become in a useful alternative to improve mechanical resistance. The main aim of the present study was to investigate the tribological behavior of a system of diffusional boride layers formed on the substrate of CoCrMo alloy. For this purpose, different boron diffusion heat treatment parameters were performed: 1223, 1248 and 1273 K by 6, 8 and 10 h, respectively. Surfaces were characterized using scanning electron microscopy (SEM), surface roughness measurement, micro-hardness testing, and X-ray diffraction. The tribological response was studied by means of ball on disc tribometer under dry-sliding conditions tracking their friction coefficient, mass loss, wear rate and surface damage by stereoscopy and SEM. Boride coating at 1223 K by 6 h showed the better wear resistance, increased it 6 times relative to the wear resistance obtained for the CoCr alloy untreated sample.
KW - Boriding
KW - CoCrMo alloy
KW - Coatings
KW - Tribology
UR - http://www.scopus.com/inward/record.url?scp=85061157551&partnerID=8YFLogxK
U2 - 10.1016/j.wear.2019.02.006
DO - 10.1016/j.wear.2019.02.006
M3 - Artículo
SN - 0043-1648
VL - 426-427
SP - 204
EP - 211
JO - Wear
JF - Wear
ER -