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首页> 外文期刊>Materials Science and Engineering >Ultrafine-grained, high-strength NiAl with Al_2O_3 and Al_4C_3 nanosized particles dispersed via mechanical alloying in toluene with spark plasma sintering
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Ultrafine-grained, high-strength NiAl with Al_2O_3 and Al_4C_3 nanosized particles dispersed via mechanical alloying in toluene with spark plasma sintering

机译:通过机械合金化在甲苯中通过火花等离子体烧结将Al_2O_3和Al_4C_3纳米尺寸的超细颗粒,高强度NiAl分散

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摘要

A 50:50 atomic ratio of elemental Ni and Al powders were subjected to mechanical alloying (MA) in a toluene medium and were consolidated via spark plasma sintering (SPS). The transmission electron microscopy (TEM) results indicated that the ultra-fine grains (226 ± 107 nm and 307 ± 150 nm) and nanometre-sized Al_2O_3 and Al_4C_3 particles dispersed in the NiAl samples sintered at 900 and 1000 ℃. A high hardness of 670 HV and a compressive yield strength of 2251 MPa were obtained in the NiAl sintered at 900 ℃ A maximum plastic strain of ~ 16.5% with a compressive yield strength of 2041 MPa was realised for the NiAl sample sintered at 1000 ℃. The contributions of the grain size and particles to the strength were calculated using the appropriate strengthening models, and the calculated theoretical yield strength of the synthesised NiAl was found to closely match the experimental values.
机译:将50:50原子比的元素Ni和Al粉末在甲苯介质中进行机械合金化(MA),然后通过火花等离子体烧结(SPS)进行固结。透射电子显微镜(TEM)结果表明,分散在NiAl样品中的超细晶粒(226±107 nm和307±150 nm)以及纳米尺寸的Al_2O_3和Al_4C_3颗粒在900和1000℃烧结。在900℃烧结的NiAl中获得了670 HV的高硬度和2251 MPa的压缩屈服强度。1000℃烧结的NiAl样品获得了约16.5%的最大塑性应变和2041 MPa的压缩屈服强度。使用合适的强化模型计算了晶粒尺寸和颗粒对强度的贡献,发现合成的NiAl的理论屈服强度与实验值非常接近。

著录项

  • 来源
    《Materials Science and Engineering》 |2013年第15期|379-386|共8页
  • 作者单位

    Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600 036, India,Department of Metallurgical Engineering, PSG College of Technology, Coimbatore, India;

    Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600 036, India,Structural Nanomaterials Lab, PSG Institute of Advanced Studies, Coimbatore, India;

    Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600 036, India;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Electron Microscopy; X-Ray Diffraction; Intermetallics; Nanostructured Materials; Mechanical Alloying; Plasticity;

    机译:电子显微镜;X射线衍射;金属间化合物纳米结构材料;机械合金化;可塑性;

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