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Thermal stability of nanocrystalline Fe-Zr alloys

机译：纳米晶Fe-Zr合金的热稳定性

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摘要

Fe-Zr nanocrystalline alloys with an as-milled grain size less than 10 nm were synthesized by ball milling. The microstructure changes due to annealing were characterized using X-ray line broadening, micro-hardness, focused ion beam channeling contrast imaging, and transmission electron microscopy (TEM). Additions of 1/3 to 4 at.% Zr stabilized nanocrystalline grain sizes at elevated annealing temperatures compared to pure Fe. With 4 at.% Zr, a fully nanocrystalline microstructure with a TEM grain size of 52 nm was retained at temperatures in excess of 900 ℃. Alloys with lower Zr contents showed less stability, but still significant compared to pure Fe. Bimodal nano-micro grain size microstructures were also observed.
机译：通过球磨合成了研磨后的晶粒尺寸小于10 nm的Fe-Zr纳米晶合金。使用X射线线加宽，显微硬度，聚焦离子束通道对比成像和透射电子显微镜（TEM）表征了由于退火引起的微观结构变化。与纯铁相比，在升高的退火温度下添加1/3至4 at。％的Zr可以稳定纳米晶粒尺寸。 Zr为4 at。％时，在超过900℃的温度下保留了TEM晶粒尺寸为52 nm的全纳米晶体微结构。 Zr含量较低的合金显示出较低的稳定性，但与纯铁相比仍显着。还观察到双峰纳米微晶粒度的微观结构。

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  • 来源
    《Materials Science and Engineering》 |2010年第15期|p.3572-3580|共9页
  • 作者

    K.A. Darling; B.K. VanLeeuwen; C.C.Koch; R.O. Scattergood;

  • 作者单位

    U.S. Army Research Laboratory, Weapons and Materials Research Directorate, RDRL-WMM-B, Aberdeen Proving Ground, MD 21005-5069, USA;

    Department of Materials Science and Engineering, NC State University, 911 Partners Way, Room 3000, Raleigh, NC 27695-7907, USA;

    Department of Materials Science and Engineering, NC State University, 911 Partners Way, Room 3000, Raleigh, NC 27695-7907, USA;

    Department of Materials Science and Engineering, NC State University, 911 Partners Way, Room 3000, Raleigh, NC 27695-7907, USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    mechanical alloying; nanostructured materials; grain growth;

    机译：机械合金化;纳米结构材料;晶粒长大;

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