Assessment of porosity and structure of powder materials based on mechanically activated Ni-Fe-NaCl charges |
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Authors: | Yu. G. Dorofeev S. N. Sergeenko R. V. Kolomiets S. I. Shevtsova A. V. Ganshin A. V. Skripets |
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Affiliation: | 1. South Russia State Technical University (NPI), Novocherkassk, Russia
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Abstract: | Electron-probe microanalysis methods were used to study the formation of structure and the distribution of various components in high-porosity powder materials during heat treatment of compacts based on Ni-Fe-NaCl charges mechanically activated in fluid media. We confirmed the hypothesis that agglomerates are formed during mechanical activation of Ni-and Fe-based composite-particle charges in fluid media. A causal relationship was established between formation of structure in compacts and structure of the high-porosity powder material after heat treatment. A technique was proposed for determining the local porosity of the sintered high-porosity powder material. The structure of the high-porosity powder material was found to consist of large pores surrounded by powder material containing pores of smaller diameter. |
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