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Synthesis and mechanical properties of open-cell Ni-Fe-Cr foams

机译：开孔Ni-Fe-Cr泡沫的合成及力学性能

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摘要

Reticulated Ni-45Fe foams were alloyed with chromium by pack-chromizing, resulting in Ni-Fe-Cr foams with 35.7-37 wt.%Fe, 13.8-25.7 wt%Cr. The Ni-45Fe foam was used as a substrate, whose struts were composed of Ni-Fe-Ni sandwich layers. The thickness and composition of the Ni-Fe-Cr foam struts were controlled by varying the deposition time. The mechanical properties of the Ni-Fe-( 13.8-25.7) Cr foams were compared to the Ni and Ni-45Fe foams at ambient temperature. Scanning electron microscopy (SEM), optical micrographs (OM) and energy dispersive spectrum (EDS) analysis were used to investigate the microstructures and the elemental composition profiles of the Ni-Fe-Cr foams respectively. The X-ray diffraction technique was used for phase identification of the foam materials. The results show that the Cr coating is dense and well adhered to the Ni-45Fe substrate. The Ni-Fe-Cr foams after homogenization exhibit a fine equiaxed grain structure. Despite an increase in density compared with the Ni-45Fe foams, the Ni-Fe-Cr foams after homogenization exhibit enhancements in both absolute and specific strength, as well as in energy absorption.
机译：网状Ni-45Fe泡沫通过装铬渗铬与铬形成合金，从而得到具有35.7-37 wt。％Fe，13.8-25.7 wt％Cr的Ni-Fe-Cr泡沫。以Ni-45Fe泡沫为基材，其支撑杆由Ni-Fe-Ni夹层组成。通过改变沉积时间来控制Ni-Fe-Cr泡沫支柱的厚度和组成。在室温下，将Ni-Fe-（13.8-25.7）Cr泡沫的机械性能与Ni和Ni-45Fe泡沫进行了比较。分别用扫描电子显微镜（SEM），光学显微照片（OM）和能谱分析（EDS）分析了Ni-Fe-Cr泡沫的微观结构和元素组成特征。 X射线衍射技术用于泡沫材料的相鉴定。结果表明，Cr涂层致密且与Ni-45Fe基体良好粘附。均质后的Ni-Fe-Cr泡沫材料表现出细小的等轴晶粒结构。尽管与Ni-45Fe泡沫相比密度有所增加，但均质后的Ni-Fe-Cr泡沫在绝对强度和比强度以及能量吸收方面均表现出增强。

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  • 来源
    《Materials Science and Engineering》 |2012年第1期|p.699-706|共8页
  • 作者

    Q. Pang; G.H. Wu; Z.Y. Xiu; G.Q. Chen; D.L Sun;

  • 作者单位

    School of Materials Science and Engineering, Harbin Institute ofTechnology, Harbin 150001. PR China;

    School of Materials Science and Engineering, Harbin Institute ofTechnology, Harbin 150001. PR China;

    School of Materials Science and Engineering, Harbin Institute ofTechnology, Harbin 150001. PR China;

    School of Materials Science and Engineering, Harbin Institute ofTechnology, Harbin 150001. PR China;

    School of Materials Science and Engineering, Harbin Institute ofTechnology, Harbin 150001. PR China;

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  • 正文语种 eng
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  • 关键词

    metallic foam; nickel based superalloys; electron microscopy; X-ray diffraction; mechanical characterization;

    机译：金属泡沫;镍基高温合金;电子显微镜;X射线衍射;机械表征;

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