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首页> 外文会议>International Conference on Materials for Advanced Technologies >Processing of Bulk Nanostructured Metal, Polymer/Clay Nanocomposites and Nano Ceramic Powder
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Processing of Bulk Nanostructured Metal, Polymer/Clay Nanocomposites and Nano Ceramic Powder

机译：散装纳米结构金属，聚合物/粘土纳米复合材料和纳米陶瓷粉的加工

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Abstract. The paper reports the results of three projects concerned with the processing of nanostructured magnesium alloy, polymer/clay nanocomposites and nano ceramic powder. The challenges and approaches taken to process the material are highlighted and discussed. For processing of bulk magnesium alloy, equal channel angular extrusion (ECAE) of ultra fine and nanostractured magnesium based on the principle of simple shearing was conducted. Three types of dies for ECAE of magnesium were designed and numerically analysed. Numerical simulation using ANSYS/LS-DYNA was conducted to evaluate the material effective strain after numerous passes of ECAE. A grain size of 100 mu m can be transformed to nanostructure after 16 passes of ECAE, For processing polymer/clay nanocomposites, isotactic polypropylene (PP)/clay nanocomposites were fabricated through melting compounding of PP with organically modified clay. To enhance the compatibility, maleated PP (mPP) with low maleic anhydride content was used as compatibilizer. The resulted PP/clay and PP/mPP/clay nanocomposites show a much-improved tensile modulus. The addition of clay was found to enhance the impact strengths of PP/clay nanocomposites. For processing of nano ceramic powder, work has been centered on using powder injection moulding (PIM) technique to produce complex components with nano-structures. PIM feedstocks with 8 to 15 nm powder sizes are injection-molded into green parts, and after debinding and sintering, a grain size of about 30 nm were obtained. However, nano cracks have been encountered and remain as a challenge for the PIM of nano ceramic powder.
机译：抽象的。本文报告了三个涉及纳米结构镁合金，聚合物/粘土纳米复合材料和纳米陶瓷粉末的工程的结果。突出显示和讨论了对处理材料采取的挑战和方法。为了处理块状镁合金，基于简单剪切原理的超细和纳米型镁的相等通道角挤出（ECAE）。设计并在数值分析了镁的三种类型的模具。进行了使用ANSYS / LS-DYNA的数值模拟，以评估众多ECAE通过后的材料有效菌株。在26次通过ECAE之后，可以将100μm的粒度为100μm，用于加工聚合物/粘土纳米复合材料，通过用有机改性的粘土熔化PP的熔融配制来制造全同立构聚丙烯（PP）/粘土纳米复合材料。为了增强具有低马来酸酐含量的兼容性PP（MPP）作为增容剂。所得的PP /粘土和PP / MPP /粘土纳米复合材料显示出较大改善的拉伸模量。发现添加粘土以增强PP /粘土纳米复合材料的冲击强度。为了处理纳米陶瓷粉末，使用粉末注射成型（PIM）技术以工作为中心，以产生具有纳米结构的复杂组分。 PIM含有8至15nm粉末尺寸的PIM原料是注塑成的绿色零件，并且在逐渐搅拌和烧结后，获得约30nm的粒度。然而，纳米裂缝已经遇到并且仍然是纳米陶瓷粉末PIM的挑战。

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