Abstract
The reduction of sintering temperatures in industrial processes is advantageous for both energy efficiency and material properties in powder metallurgy. Based on the well-known size effects of nano-particles on sintering processes, nano-particles were intentionally used as a homogeneous sintering activator for micro-particles in this study. Two kinds of tungsten bimodal feedstocks which consisted of nano-particles and microparticles were prepared and sintered by spark plasma sintering processed. Even at the low sintering temperature of 1,250 °C and the short sintering time of 300 sec, relatively high densities could be achieved. Depending on the content of the nano-particles in the charged feedstock, the sintered body exhibited different morphological features. Density, field emission scanning electron microscopy, transmission electron microscope was used for analysis.
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Han, C., Choi, H. & Kim, B. Nano-attached tungsten particle synthesis and sintering behaviors. Met. Mater. Int. 19, 1035–1039 (2013). https://doi.org/10.1007/s12540-013-5016-0
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DOI: https://doi.org/10.1007/s12540-013-5016-0