TY - JOUR
T1 - Microstructure and elevated temperature tribological behavior of TiO2/Al2O3 composite ceramic coating formed by microarc oxidation of Ti6Al4V alloy
AU - Wang, Shuaixing
AU - Zhao, Qing
AU - Liu, Daoxin
AU - Du, Nan
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/6/25
Y1 - 2015/6/25
N2 - Microarc oxidation (MAO) treatment of Ti6Al4V alloys in silicate electrolyte with Al2O3 microparticles resulted in a composite ceramic coating containing Al2O3. The microstructure, phase composition and high temperature tribological behavior of the composite coating were analyzed by SEM, EDS, XRD and ball-on-disc abrasive tests. The results revealed that the MAO coating formed in the absence of Al2O3 microparticles was porous, and mainly composed of rutile-TiO2, anatase-TiO2 and Al2TiO5 phase. In the composite ceramic coating, the surface porosity decreased significantly, and α-Al2O3 and more Al2TiO5 phase were identified. Compared to the MAO coating without Al2O3, the composite ceramic coating exhibited better wear resistance at 300°C, as demonstrated by the lower friction coefficient, lower wear rate and mild wear spots. The enhancement of wear resistance at high temperature is attributed to the denser surface structure and higher fraction of Al2TiO5 phase.
AB - Microarc oxidation (MAO) treatment of Ti6Al4V alloys in silicate electrolyte with Al2O3 microparticles resulted in a composite ceramic coating containing Al2O3. The microstructure, phase composition and high temperature tribological behavior of the composite coating were analyzed by SEM, EDS, XRD and ball-on-disc abrasive tests. The results revealed that the MAO coating formed in the absence of Al2O3 microparticles was porous, and mainly composed of rutile-TiO2, anatase-TiO2 and Al2TiO5 phase. In the composite ceramic coating, the surface porosity decreased significantly, and α-Al2O3 and more Al2TiO5 phase were identified. Compared to the MAO coating without Al2O3, the composite ceramic coating exhibited better wear resistance at 300°C, as demonstrated by the lower friction coefficient, lower wear rate and mild wear spots. The enhancement of wear resistance at high temperature is attributed to the denser surface structure and higher fraction of Al2TiO5 phase.
KW - AlO microparticles
KW - Composite ceramic coating
KW - High temperature tribological behavior
KW - Microarc oxidation
KW - Ti6Al4V alloy
UR - https://www.scopus.com/pages/publications/84929133940
U2 - 10.1016/j.surfcoat.2015.03.044
DO - 10.1016/j.surfcoat.2015.03.044
M3 - 文章
AN - SCOPUS:84929133940
SN - 0257-8972
VL - 272
SP - 343
EP - 349
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -