TY - JOUR
T1 - Micro-abrasive wear resistance of CoB/Co2B coatings formed in CoCrMo alloy
AU - Rodríguez-Castro, G. A.
AU - Reséndiz-Calderon, C. D.
AU - Jiménez-Tinoco, L. F.
AU - Meneses-Amador, A.
AU - Gallardo-Hernández, E. A.
AU - Campos-Silva, I. E.
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/12/25
Y1 - 2015/12/25
N2 - New data for micro-abrasion wear resistance of CoB/Co2B coating was obtained through a ball cratering test. The coating was formed on the surface of a CoCrMo alloy using the powder-pack boriding method. The boriding process was carried out at 1223K over 5h of treatment resulting in the formation of CoB/Co2B coating with a total thickness of 28μm approximately. Both hardness and Young's modulus profile through the cobalt borides were evaluated by Berkovich depth-sensing indentation using a load of 25mN. The wear coefficients of CoB and Co2B formed on CoCrMo alloy were evaluated by a Plint TE-66 micro-abrasion tester using SiC particles dissolved in deionized water as abrasive slurry. The results demonstrated that the cobalt borides have wear coefficients higher than CoCrMo and improve their micro-abrasion wear resistance. Furthermore, a wear-mode map was developed to identify the two and three body abrasion mechanisms and the transition between them modifying the concentration of SiC in the slurry and the magnitude of applied load.
AB - New data for micro-abrasion wear resistance of CoB/Co2B coating was obtained through a ball cratering test. The coating was formed on the surface of a CoCrMo alloy using the powder-pack boriding method. The boriding process was carried out at 1223K over 5h of treatment resulting in the formation of CoB/Co2B coating with a total thickness of 28μm approximately. Both hardness and Young's modulus profile through the cobalt borides were evaluated by Berkovich depth-sensing indentation using a load of 25mN. The wear coefficients of CoB and Co2B formed on CoCrMo alloy were evaluated by a Plint TE-66 micro-abrasion tester using SiC particles dissolved in deionized water as abrasive slurry. The results demonstrated that the cobalt borides have wear coefficients higher than CoCrMo and improve their micro-abrasion wear resistance. Furthermore, a wear-mode map was developed to identify the two and three body abrasion mechanisms and the transition between them modifying the concentration of SiC in the slurry and the magnitude of applied load.
KW - Boriding
KW - CoB/CoB phases
KW - Micro-abrasion
KW - Wear coefficient
KW - Wear-mode map
UR - http://www.scopus.com/inward/record.url?scp=84958771699&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2015.06.081
DO - 10.1016/j.surfcoat.2015.06.081
M3 - Artículo
SN - 0257-8972
VL - 284
SP - 258
EP - 263
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -