摘要
采用等离子喷涂法制备的航空发动机涡轮部件不能满足抗高温和热腐蚀需求。采用真空电弧离子镀技术(AIP)在GH3030镍基高温合金上制备170～180μm厚的NiCrAlYSi涂层,研究了该涂层700℃下的高温氧化行为和760℃下的燃气热腐蚀行为。结果表明:经过长时间的氧化,NiCrAlYSi涂层表面形成了以Al2O3,Cr2O3为主的氧化膜,提高了其抗高温氧化性能;经过760℃,100h燃气腐蚀试验后,NiCrAlYSi涂层主要由Ni3Al和α-Cr相组成,NiCrAlYSi涂层明显改善了GH3030合金的抗低温热腐蚀性能。
NiCrAlYSi coating with a thickness of 170～ 180 μm was deposi-ted on the surface of GH3030 Ni-based superalloy by arc ion plat-ing(AIP) in vacuum.The oxidation behavior at 700℃ and cor-rosion behavior in hot combustion gas at 760℃ of the coating were investigated respectively.Results show that Al2O3 and Cr2O3 oxidation layers are formed on the surface of the coating,which can enhance the oxidation resistance of GH3030 alloy at elevated temperature.Upon exposure to hot combustion gas at 760℃ for 100 h,the NiCrAlYSi coating was mainly composed of Ni3Al and a-Cr,and significantly improved low-temperature hot corrosion resistance of the Ni-based superalloy.
出处
《材料保护》
CAS
CSCD
北大核心
2010年第9期56-58,共3页
Materials Protection
