TY - GEN
T1 - Effect of yttrium ion on YSZ-Al2O3 composite coating formed by PEO on a cast Al-Si-Cu-Ni alloy
AU - Wang, Ping
AU - Liu, Dao Xin
AU - Li, Jian Ping
AU - Guo, Yong Chun
AU - Yang, Zhong
PY - 2013
Y1 - 2013
N2 - Y2O3-ZrO2-Al2O3 (YSZ-Al2O3) composite ceramic coating was formed on a cast Al-12Si-3Cu-2Ni alloy by plus AC plasma electrolytic oxidation (PEO) process, with yttrium ion concentrations varying from 0 to 0.5 g/l and process time from 0 to 45 min. The microstructures of the coatings were investigated by SEM and XRD. The results show that the PEO coating growth behaviour and microstructure were affected greatly by Y ion additions. At a given oxidation time, the coating growth rate accelerated and thickness increased in the PEO process when adding yttrium ions. When the content of Y ions is greater than the optimum value of 0.05 g/l, coating growth gradually decreases. In comparison with a ZrO2-Al2O3 coating, the amount of micro particle in YSZ-Al2O3 coating is less and the ceramic layer is repeatedly deposited by ceramic particles and good binding was achieved between the ceramic coating and the base alloy. The uniform and compact YSZ-Al2O3 composite coating is mainly composed of c-Y0.15Zr0.85O1.93 solid solution, m-ZrO2, a-Al2O3,-Al2O3 and Y2O3 phases. The ZrO2 phase was well stabilized by solid solution containing yttrium element and Al2O3.
AB - Y2O3-ZrO2-Al2O3 (YSZ-Al2O3) composite ceramic coating was formed on a cast Al-12Si-3Cu-2Ni alloy by plus AC plasma electrolytic oxidation (PEO) process, with yttrium ion concentrations varying from 0 to 0.5 g/l and process time from 0 to 45 min. The microstructures of the coatings were investigated by SEM and XRD. The results show that the PEO coating growth behaviour and microstructure were affected greatly by Y ion additions. At a given oxidation time, the coating growth rate accelerated and thickness increased in the PEO process when adding yttrium ions. When the content of Y ions is greater than the optimum value of 0.05 g/l, coating growth gradually decreases. In comparison with a ZrO2-Al2O3 coating, the amount of micro particle in YSZ-Al2O3 coating is less and the ceramic layer is repeatedly deposited by ceramic particles and good binding was achieved between the ceramic coating and the base alloy. The uniform and compact YSZ-Al2O3 composite coating is mainly composed of c-Y0.15Zr0.85O1.93 solid solution, m-ZrO2, a-Al2O3,-Al2O3 and Y2O3 phases. The ZrO2 phase was well stabilized by solid solution containing yttrium element and Al2O3.
KW - Al-Si-Cu-Ni aluminium alloy
KW - Composite ceramic coating
KW - Plasma electrolytic oxidation
KW - Yttrium ion
UR - http://www.scopus.com/inward/record.url?scp=84883002865&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.765.668
DO - 10.4028/www.scientific.net/MSF.765.668
M3 - 会议稿件
AN - SCOPUS:84883002865
SN - 9783037857663
T3 - Materials Science Forum
SP - 668
EP - 672
BT - Light Metals Technology 2013
PB - Trans Tech Publications Ltd
T2 - 6th International Light Metals Technology Conference, LMT 2013
Y2 - 24 July 2013 through 26 July 2013
ER -