江西科学2016，Vol.34Issue(6)：834-839,6.DOI:10.13990/j.issn1001-3679.2016.06.023
冷喷涂NiCoCrAlY涂层的组织结构特征与抗氧化性能研究
Microstructure Characteristics and Oxidation Resistance of Cold-sprayed NiCoCrAlY Coating
摘要
Abstract
A NiCoCrAlY coating was prepared by low-pressure cold spray technology. After deposi-tion,the microstructure of as-sprayed coating was characterized by SEM and XRD. The oxidation re-sistance of as-sprayed coating was investigated by static oxidation experiment. The results show that the as-sprayed coating presents a dense structure with low oxygen content (0. 25 % mass fraction) and low porosity (less than 0. 92% volume fraction). In the process of cold spraying,the powder ma-terial has a phase transition,which is transformed from theγ-Matrix Ni-Co-Cr andβ-( Ni,Co) Al in-to a single phase structure of γ-Matrix. Furthermore,the as-spayed coating contained a large amount of nanocrystals. After oxidation for 400 h at 1 050 ℃,a dense and continuous TGO with a thickness of 2. 85 ± 0. 12 μm,mainly composed ofα-Al2 O3 ,was formed in the surface of as-sprayed. The spal-ling of TGO did not occur. The NiCoCrAlY Coating was expected to have a longer oxidation life.关键词
MCrAlY涂层/冷喷涂/微观组织/氧化行为Key words
MCrAlY coating/cold spray/oxidation behavior/vacuum pre-oxidation分类
矿业与冶金引用本文复制引用
张林伟,陈志宝,陆磊,余玖明,曾卫军,陆德平..冷喷涂NiCoCrAlY涂层的组织结构特征与抗氧化性能研究[J].江西科学,2016,34(6):834-839,6.基金项目
江西省科技支撑计划项目(20151BBB50264) （20151BBB50264）
江西省自然科学基金(20161BAB216147) （20161BAB216147）
江西省科技合作领域项目(20161BBH80061)。 （20161BBH80061）
