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首页> 外文期刊>Applied Surface Science >Investigations On The Growing, Cracking And Spalling Of Oxides Scales Of Powder Metallurgy Rene95 Nickel-Based Superalloy
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Investigations On The Growing, Cracking And Spalling Of Oxides Scales Of Powder Metallurgy Rene95 Nickel-Based Superalloy

机译：粉末冶金Rene95镍基高温合金的氧化皮生长，开裂和剥落的研究

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摘要

The surface and cross-sectional morphologies of powder metallurgy (PM) Rene95 nickel-based superalloy after 100 h oxidation in the temperature range of 700-1100 °C were investigated. It is shown that oxides nucleate first on the surface of the alloy and form an oxides scale. Afterwards, oxides scale endures decohesion, rumpling, cracking and finally spalling owing to the weak cohesive strength of the scale/alloy interface. The XRD and EDS analyses confirmed that the oxides scale of PM Rene95 superalloy is mainly composed by Cr_2O_3 at 800 °C and NiCr_2O_4 is the main spinel at 1100 ℃.The subsequent analysis of internal stress verified that cracking and spalling are caused by growth stress and promoted by thermal stress. On these bases, improvement of the cohesive strength of the scale/alloy interface is considered to be the main way to increase the oxidation resistance of PM Rene95 superalloy.
机译：研究了粉末冶金（PM）Rene95镍基高温合金在700-1100°C的温度下氧化100小时后的表面和截面形态。结果表明，氧化物首先在合金表面成核并形成氧化皮。之后，由于水垢/合金界面的弱内聚强度，氧化物水垢承受脱粘，起皱，开裂并最终剥落。 XRD和EDS分析证实，PM Rene95高温合金的氧化皮主要由800℃时的Cr_2O_3组成，而1100℃时NiCr_2O_4是主要的尖晶石。由热应力促进。在这些基础上，改善氧化皮/合金界面的内聚强度被认为是提高PM Rene95高温合金抗氧化性的主要方法。

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  • 来源
    《Applied Surface Science》 |2011年第23期|p.9762-9767|共6页
  • 作者

    Lei Zheng; Maicang Zhang; Reda Chellali; Jianxin Dong;

  • 作者单位

    School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China Institute of Materials Physics, University ofMuenster, Wilhelm-Klemm-Str. 10,48149, Muenster, Germany;

    School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China;

    Institute of Materials Physics, University ofMuenster, Wilhelm-Klemm-Str. 10,48149, Muenster, Germany;

    School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Nickel based superalloys; Powder metallurgy; Oxidation; Rene95;

    机译：镍基高温合金;粉末冶金;氧化;Rene95;

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