Abstract
The pore behavior of nano Al compacts prepared by magnetic pulsed compaction in a temperature range from 20°C to 300°C and under pressure of 0.7 and 1.6 GPa was studied by small angle neutron scattering (SANS) analysis. The size distribution and volume fraction of pores in the compact were determined by corrected scattering curves using a direct model fitting, under the assumption that the pores were spherical in shape. The densities obtained from the SANS analysis were well matched with those of direct measurement in the range of 76–95% of theoretical density. As the compaction temperature increased from 20°C to 300°C, the size of pores increased from 1.69 to 2.31 nm; however, the number of pores decreased from 169 to 71 (1/cmÅ2) in the case of 1.6 GPa compaction pressure. As a result, the density increased as the compaction temperature increased.
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This article is based on a presentation made in the 2002 Korea-US symposium on the “Phase Transformations of Nano-Materials”, organized as a special program of the 2002 Annual Meeting of the Korean Institute of Metals and Materials, held at Yonsei University, Seoul, Korea on October 25–26, 2002.
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Lee, G.H., Rhee, C.K., Kim, K.H. et al. The effect of compaction temperature and pressure on the pores in nanostructured metal compacts prepared by magnetic pulsed compaction. Met. Mater. Int. 9, 375–378 (2003). https://doi.org/10.1007/BF03027190
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DOI: https://doi.org/10.1007/BF03027190