Mondal Avijit, Agrawal Dinesh, Upadhyaya Anish
Department of Materials & Metallurgical Engineering, Indian Institute of Technology, Kanpur 208016, India.
J Microw Power Electromagn Energy. 2009;43(1):5-10. doi: 10.1080/08327823.2008.11688599.
In recent years, microwave processing of metal/alloy powders have gained considerable potential in the field of material synthesis. Microwave heating is recognized for its various advantages such as: time and energy saving, rapid heating rates, considerably reduced processing cycle time and temperature, fine microstructures and improved mechanical properties, better product performance, etc. Microwave material interaction for materials having bound charge are well established, but for highly conductive materials like metals, there is not much information available to interpret the mechanism of microwave heating and subsequent sintering of metallic materials. The present study describes how the thermal profile of electrically conductive powder metal like copper changes with particle size and also with porosity content; in other words, initial green density when the material is exposed to 2.45 GHz microwave radiation in a multimode microwave furnace.
近年来，金属/合金粉末的微波处理在材料合成领域展现出了巨大的潜力。微波加热因其诸多优点而被认可，例如：节省时间和能源、加热速度快、显著缩短加工周期时间和降低温度、微观结构精细且机械性能提高、产品性能更佳等。对于具有束缚电荷的材料，微波与材料的相互作用已得到充分证实，但对于像金属这样的高导电材料，关于解释微波加热及随后金属材料烧结机制的信息却不多。本研究描述了像铜这样的导电粉末金属的热分布如何随粒径以及孔隙率含量而变化；换句话说，就是当材料在多模微波炉中暴露于2.45 GHz微波辐射时的初始生坯密度。
