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Effect of the degree of oxidation on the structure and properties of material obtained by electric sintering of powdered swarf of aluminum bronze

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Conclusions

A characteristic feature of specimens of powdered swarf of aluminum bronze sintered by an electric current is the existence of interparticular contacts of films containing copper, aluminum, and iron oxides.

The process of capture of particles is substantially affected by the state of their surface. In the zone of contact there occur complex physicochemical phenomena due to the simultaneous destruction (as a result of electrical breakdown, thermal dissociation of oxides, additional deformation of particles) and renewed partial restoration of oxide films. In some places there is not enough time for films to originate again. On account of that physical contact is established between the contiguous surfaces of the particles.

As a result of the disappearance or reduction of the amount of interparticular oxides in specimens sintered by electric current, electrical resistance decreases and the strength of the material increases.

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Literature cited

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Authors and Affiliations

  1. Institute of Materials Science, Academy of Sciences of the Ukrainian SSR, Ukraine

    A. S. Morozov, A. I. Raichenko, I. N. Tomchak, N. I. Lysakovskii & A. Ya. Oltarzhevskii

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  1. A. S. Morozov
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  2. A. I. Raichenko
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  3. I. N. Tomchak
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  4. N. I. Lysakovskii
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  5. A. Ya. Oltarzhevskii
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Translated from Poroshkovaya Metallurgiya, No. 10(298), pp. 44–48, October, 1987.

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Morozov, A.S., Raichenko, A.I., Tomchak, I.N. et al. Effect of the degree of oxidation on the structure and properties of material obtained by electric sintering of powdered swarf of aluminum bronze. Powder Metall Met Ceram 26, 814–818 (1987). https://doi.org/10.1007/BF00794363

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  • DOI: https://doi.org/10.1007/BF00794363

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