TY - JOUR
T1 - Effect of vacuum pre-oxidation treatment on oxidation behavior of thermal barrier coating
AU - Du, Zhong
AU - Wang, Quan Sheng
AU - Liu, Yan Bo
AU - Li, Yun Kai
N1 - Publisher Copyright:
©, 2015, Chinese Journal of Aeronautics. All right reserved.
PY - 2015/10/1
Y1 - 2015/10/1
N2 - NiCoCrAlY bond coating was prepared by high velocity oxy-fuel (HVOF) spray and top coating was prepared by plasma spray. Pre-oxidation was conducted before the high temperature isothermal oxidation. Effect of vacuum pre-oxidation on the oxidation behavior of thermal barrier coatings was studied by high temperature static oxidation experiment. The results show that a dense and continuous α-Al2O3 film is formed after the pre-oxidation treatment. After oxidation for 800 h at 1050℃, a TGO, composed of α-Al2O3 and a large amout of spinel-type oxides, was formed in as-sprayed coating. On the contrary, a TGO, mainly composed of α-Al2O3, is formed in the coating after pre-oxidation treatment. Pre-oxidation treatment can postpone the formation of spinel oxide effectively and then slow down the growth rate of thermally grown oxide (TGO).
AB - NiCoCrAlY bond coating was prepared by high velocity oxy-fuel (HVOF) spray and top coating was prepared by plasma spray. Pre-oxidation was conducted before the high temperature isothermal oxidation. Effect of vacuum pre-oxidation on the oxidation behavior of thermal barrier coatings was studied by high temperature static oxidation experiment. The results show that a dense and continuous α-Al2O3 film is formed after the pre-oxidation treatment. After oxidation for 800 h at 1050℃, a TGO, composed of α-Al2O3 and a large amout of spinel-type oxides, was formed in as-sprayed coating. On the contrary, a TGO, mainly composed of α-Al2O3, is formed in the coating after pre-oxidation treatment. Pre-oxidation treatment can postpone the formation of spinel oxide effectively and then slow down the growth rate of thermally grown oxide (TGO).
KW - High temperature oxidation
KW - Thermal barrier coating
KW - Thermally grown oxide
KW - Vacuum pre-oxidation
UR - http://www.scopus.com/inward/record.url?scp=84945939669&partnerID=8YFLogxK
U2 - 10.11868/j.issn.1005-5053.2015.5.005
DO - 10.11868/j.issn.1005-5053.2015.5.005
M3 - Article
AN - SCOPUS:84945939669
SN - 1005-5053
VL - 35
SP - 27
EP - 31
JO - Hangkong Cailiao Xuebao/Journal of Aeronautical Materials
JF - Hangkong Cailiao Xuebao/Journal of Aeronautical Materials
IS - 5
ER -