热扩散处理电弧离子镀铝涂层的结构及其抗氧化性能  

Microstructure and Oxidation Resistance of Thermal Diffusion Treatment of Arc Ion Plating Aluminum Coatings

作　　者：杨文茂[1] 罗郁雯[1] 曹银春[1] 李雪源[1] 刘庆利[2] 李昌安[1] 

机构地区：[1]中国工程物理研究院机械制造工艺研究所,四川绵阳621900 [2]西南交通大学材料科学与工程学院,成都610031

出　　处：《中国表面工程》2014年第4期43-48,共6页China Surface Engineering

摘　　要：为了提高抗氢钢的抗高温氧化能力,采用电弧离子镀在抗氢钢上沉积Al涂层,通过高温热扩散处理,制备得铝基复合涂层。试验了不同温度对铝基复合涂层性能的影响,采用X射线光电子能谱仪(XPS)、X射线能谱仪(EDS)、X射线衍射仪(XRD)和扫描电镜(SEM)等分别测试了涂层的成分、晶体结构及表面、剖面形貌,通过高温氧化试验测试了涂层的抗高温氧化性能。结果表明:电弧离子镀Al涂层经热扩散处理后,剖面结构为分层分布,表层为Al2O3层,700℃处理后的厚度约0.7μm,为非晶态;950℃处理后的厚度约为2.2μm,为α相。内层为热扩散层,700℃形成成分含量不同的两层热扩散层,由FeNiAl5、FeAl3、Fe4Al13及Ni2Al3等多种富铝相组成;950℃形成热稳定相立方体的FeAl和NiAl相。Aluminium coatings were deposited by arc ion plating on hydrogen resistance steel. Thermal diffusion treatment of Al coatings is used to improve the high-temperature oxidation resistance for hydrogen resistance steel. The influence of different thermal diffusion temperatures on performance of At coatings was researched. The composition, structure and morphology of Al coatings were analyzed by X-ray photoelectric spectroscopy（XPS） ,energy dispersive spectrometer （EDS）, X-ray diffraction（XRD） and scanning electron microscope （SEM）. The high-temperature oxidation resistance performance was tested. The AI coatings treated by thermal diffusion is multi-layers. The thickness of the outer amorphous AlaO3 layer is about 0.7 /lm after thermal diffusing at 700 ℃ for 4 h, while the thickness of the outer α-phase Al2 O3 layer is about 2.2 μm after thermal diffusing at 950 ℃ for 2 h. The inner diffusion layer contains mainly Al, Fe, Ni and Cr, indicating that this is essentially an intermetallic zone. After thermal diffusing at 700 ℃ for 4 h, the double diffusion layers with different composition contents are formed and contains different Al-rich intermetallic phases, such as, FeNiAl5, FeAl3, Fe4Al13 and Ni2Al3. After thermal diffusion treatment at 950 ℃, the single diffusion layer with uniformity distribution of composition content is formed and contains FeAI and NiAl phases.

关 键 词：铝涂层 抗氢钢 热扩散 电弧离子镀 

分 类 号：TG174.44[金属学及工艺—金属表面处理]