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Effect of raw materials on microstructure and bending strength of porous in situ MgO/Fe-Cr-Ni composites

机译:原材料对多孔原位MgO / Fe-Cr-Ni复合材料的组织和弯曲强度的影响

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摘要

Porous in situ MgO (17.0-34.9 wt.%)/Fe-Cr-Ni composites were prepared from the mixtures of Mg and the powder compositions, such as nano-Fe_2O_3 + Cr + Ni, micro-Fe_2O_3 + Cr + Ni, micro-Cr_2O_3 + Fe + Ni or micro-Ni_2O_3 + Fe + Cr, via pressureless reactive sintering at 600-800 ℃ for 2 h. The influence of raw materials on microstructure and bending strength of the resultant porous composites were studied. The results showed that the porous composites, fabricated at 700℃ for 2h, consisted of MgO, Cr_(0.7)Fe_(0.36)Ni_(2.9) and CrFe phases generally. The porous composite fabricated from the mixture of nano-Fe_2O3, Mg, Cr and Ni, whose fracture mode was a mainly ductile manner, had uniform pore size and possessed higher bending strength than other resultant porous composites.
机译:由Mg和粉末组合物的混合物制备多孔原位MgO(17.0-34.9 wt。%)/ Fe-Cr-Ni复合材料,如纳米Fe_2O_3 + Cr + Ni,微型Fe_2O_3 + Cr + Ni,微型-Cr_2O_3 + Fe + Ni或微Ni_2O_3 + Fe + Cr,在600-800℃下进行2 h无压力反应烧结。研究了原料对所得多孔复合材料微观结构和抗弯强度的影响。结果表明,在700℃下制备2h的多孔复合材料一般由MgO,Cr_(0.7)Fe_(0.36)Ni_(2.9)和CrFe相组成。由纳米Fe_2O3,Mg,Cr和Ni的混合物制成的多孔复合材料,其断裂模式主要是延性方式,其孔径均一,并且比其他所得多孔复合材料具有更高的弯曲强度。

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  • 来源
    《Materials Science and Engineering》 |2011年第30期|p.8438-8442|共5页
  • 作者单位

    Post-doctoral Mobile Stations of Material Science and Engineering, Xi'an University of Architecture &Technology, Xi'an 710055, China,School of Material Science and Technology, Xi'an University of Architecture & Technology, Xi'an 710055, China;

    Xi'an Yanliang National Aviation Hi-tech Industrial Base (CAIB), Xi'an 710089, China;

    State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China;

    State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China;

    Post-doctoral Mobile Stations of Material Science and Engineering, Xi'an University of Architecture &Technology, Xi'an 710055, China;

    School of Science, Xi'an Jiaotong University, Xi'an 710049, China;

    Extreme Energy-Density Research Institute, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan;

    Extreme Energy-Density Research Institute, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan;

    Extreme Energy-Density Research Institute, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    porous materials; composites; electron microscopy; mechanical characterization; sintering;

    机译:多孔材料复合材料电子显微镜;机械特性烧结;

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