张志玺,曹依然,操光辉.Pt改性Ni3Al基合金短时高温氧化行为研究[J].稀有金属材料与工程,2021,50(4):1270~1282.[Zhang Zhixi,Cao Yiran,Cao Guanghui.Short-term high temperature oxidation behavior of Pt-modified Ni3Al-based alloys[J].Rare Metal Materials and Engineering,2021,50(4):1270~1282.]
Pt改性Ni3Al基合金短时高温氧化行为研究
投稿时间:2020-02-20  修订日期:2020-04-27
中文关键词:  Pt改性Ni[sub_s]3[sub_e]Al  短时高温氧化  氧化速率  氧化物形貌  XPS
基金项目:上海市科委国际合作项目资助(16520721700)
中文摘要:
      用冷坩埚悬浮熔炼制备了Ni-xPt-25Al(x = 0、10、20、30 at.%)系列合金,利用X射线衍射、同步热分析仪、扫描电镜和光电子能谱仪,分析了Pt的添加对晶体结构的影响,研究了Ni-xPt-25Al合金的氧化动力学曲线,氧化物形貌,以及抗氧化性能。结果表明:随着Pt含量的升高,Pt改性Ni3Al基合金仍保持γ′相。升温过程和短时等温阶段分别符合线性和抛物线氧化物生长动力学规律。Pt有利于氧化物的快速形成,且随Pt含量的增加,氧化膜的完整性和致密性均有所改善。
Short-term high temperature oxidation behavior of Pt-modified Ni3Al-based alloys
英文关键词:Pt-modified Ni3Al  short-term high temperature oxidation  oxidation rate  morphology of oxide  XPS
英文摘要:
      The Ni-xPt-25Al (x = 0, 10, 20 and 30 at.%) alloys were fabricated by cold crucible levitation melting under argon atmosphere on a water-cooled Cu crucible. The effects of Pt contents on crystal structures, oxidation kinetics, morphologies of oxides, and oxidation resistance of the Ni-xPt-25Al alloys were studied using X-ray diffraction, simultaneous thermal analyzer, scanning electron microscopy, and X-ray photoelectron spectroscopy. The experimental results showed that Pt-modified Ni3Al-based alloys still kept γ′ phases with Pt contents increasing. The heating up and isothermal periods yield to the linear and parabolic kinetic laws, respectively. Pt plays a beneficial role in promoting the formation of oxides, meanwhile, the increased addition of Pt also improved the integrality and compactness of the oxide films.
作者单位E-mail
张志玺 上海大学材料科学与工程学院 zhixizhang@163.com 
曹依然 上海大学材料科学与工程学院 yrcao12345@163.com 
操光辉 上海大学材料科学与工程学院 ghcao@shu.edu.cn 
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