2O4等復(fù)合氧化物,中間層為Cr2O3、MoO2等氧化物。由于在氧化層與基體界面處形成連續(xù)致密的SiO2層,有效阻止Cr離子向外擴(kuò)散進(jìn)入氧化層,促進(jìn)Hastelloy N合金中間層形成較為致密的Cr2O3氧化層,提高了合金的抗氧化性能。"/>

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Si對(duì)Hastelloy N合金氧化行為的影響
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作者單位:

1.中國科學(xué)院上海應(yīng)用物理研究所;2.重慶交通大學(xué)機(jī)電與汽車工程學(xué)院

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中圖分類號(hào):

TG146.1+5

基金項(xiàng)目:

國家自然科學(xué)基金資助(項(xiàng)目號(hào)51674237)；超輕材料與表面技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室


Effects of silicon on the oxidation behavior of Hastelloy N superalloy at 850℃
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Affiliation:

1.Shanghai Institute of Applied Physics,Chinese Academy of Sciences;2.School of Mechanotronics Vehicle Engineering,Chongqing Jiaotong University

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    摘要:

    利用不連續(xù)增重法,研究了不同Si含量的Hastelloy N合金850℃恒溫氧化行為。結(jié)果表明隨Si含量的增加,氧化動(dòng)力學(xué)曲線保持拋物線規(guī)律。氧化100h后,氧化膜出現(xiàn)分層現(xiàn)象,最外層均為NiO、NiFe2O4等復(fù)合氧化物,中間層為Cr2O3、MoO2等氧化物。由于在氧化層與基體界面處形成連續(xù)致密的SiO2層,有效阻止Cr離子向外擴(kuò)散進(jìn)入氧化層,促進(jìn)Hastelloy N合金中間層形成較為致密的Cr2O3氧化層,提高了合金的抗氧化性能。

    Abstract:

    The isothermal oxidation behavior of Hastelloy N superalloy with different silicon contents in air at 850℃ were investigated by using discontinuous increasing weight method. The results showed that oxidation mass gain kinetics of the samples follow the parabolic law. It was observed that the surfaces of the alloys exhibited a multi-layer structure after 100h oxidation. The outer oxide flim of Hastelloy N superalloy mainly consists of NiO, NiFe2O4and other oxide composites. The middle layer is confirmed to be Cr2O3 and MoO2. Since a continuous and dense SiO2 sublayer is formed at the metal-oxide interface, it is effective to prevent Cr diffusion. The addition of Si promotes the formation of a relatively continuous and compact Cr2O3 and it can strongly improve the oxidation resistance.

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郭偉杰,李建樹,陸燕玲,張繼祥,周興泰. Si對(duì)Hastelloy N合金氧化行為的影響[J].稀有金屬材料與工程,2019,47(3):885~891.[Guo Weijie, Li Jianshu, Lu Yanling, Zhang Jixiang, Zhou Xingtai. Effects of silicon on the oxidation behavior of Hastelloy N superalloy at 850℃[J]. Rare Metal Materials and Engineering,2019,47(3):885~891.]
DOI：10.12442/j. issn.1002-185X.20170712

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  • 收稿日期:2017-08-11
  • 最后修改日期:2017-10-14
  • 錄用日期:2017-11-09
  • 在線發(fā)布日期: 2019-04-10
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