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首页> 外文期刊>Journal of Materials Science >Mechanical properties of ferroelastic La0.6Sr0.4Co0.2Fe0.8O3- with various porosities and pore sizes
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Mechanical properties of ferroelastic La0.6Sr0.4Co0.2Fe0.8O3- with various porosities and pore sizes

机译：erroelastic la0.6sr0.4co0.2fe0.8o3的机械性能与各种孔隙和孔径

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摘要

We have investigated the mechanical properties of porous La0.6Sr0.4Co0.2Fe0.8O3- (LSCF) under uniaxial compression. Porous LSCF samples containing polymethyl methacrylate pore former with different diameters (0.4, 1.5 and 10 mu m) were examined. The porosity increases with the increase in pore former content, and it also slightly increases with the increase in pore former size. The average pore size is constant for the same size pore former regardless of the porosity, and it is smaller than the original pore former diameter. X-ray diffraction confirms that all the samples have a rhombohedral crystal structure. The samples contain ferroelastic domains and exhibit clear mechanical behavior related to the ferroelasticity under uniaxial compression. The initial modulus, critical stress and compressive fracture strength of the porous sample decrease with the increase in porosity and pore size, where the dependence on the pore size is most clear for the fracture strength. An empirical equation to estimate the fracture strength of porous LSCF is proposed.
机译：我们在单轴压缩下研究了多孔LA0.6SR0.4CO0.2FE0.8O3-（LSCF）的机械性能。检查含有不同直径（0.4,1.5和10μm）的聚甲基丙烯酸甲酯孔前甲基丙烯酸甲酯的多孔LSCF样品。随着孔隙以前含量的增加，孔隙率随着孔隙以前尺寸的增加而略有增加。无论孔隙率如何，平均孔径为相同尺寸的孔隙，并且它小于原始孔前直径。 X射线衍射证实所有样品都具有菱形晶体结构。样品含有铁弹性结构域，并表现出与单轴压缩下的红弹性相关的明显机械行为。多孔样品的初始模量，临界应力和压缩断裂强度随着孔隙率和孔径的增加而降低，其中对孔径的依赖性最清晰地用于断裂强度。提出了估计多孔LSCF裂缝强度的经验方程。

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  • 来源
    《Journal of Materials Science》 |2019年第7期|共10页
  • 作者

    Islam Md. Nurul; Araki Wakako; Arai Yoshio;

  • 作者单位

    Rajshahi Univ Engn &

    Technol Dept Mech Engn Rajshahi 6204 Bangladesh;

    Saitama Univ Dept Mech Engn Sakura Ku 255 Shimo Okubo Saitama 3388570 Japan;

    Saitama Univ Dept Mech Engn Sakura Ku 255 Shimo Okubo Saitama 3388570 Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
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