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Positron annihilation in powder metallurgical materials of various degrees of porosity

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Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Conclusions

A material with a well-developed surface is characterized by a narrowing of its AAPD curve and by the appearance of a narrow component in the small-angle region. The positron annihilation parameters of nickel powder compacts are greater than those of cast and worked nickel and grow with increasing degree of porosity, which is evidence for preferential positron localization on the pore surfaces. Using experimental data and a model of positron trapping by defects, estimates were made of the effective pore size¯Rv and pore concentration Cv as functions of the degree of porosity.

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Authors and Affiliations

  1. Institute of Metal Physics, Academy of Sciences of the Ukrainian SSR, Ukraine

    I. Ya. Dekhtyar, V. V. Skorokhod, S. G. Sakharova, Yu. M. Litvinenko & Ch. Abraev

  2. Institute of Materials Science, Academy of Sciences of the Ukrainina SSR, Ukraine

    I. Ya. Dekhtyar, V. V. Skorokhod, S. G. Sakharova, Yu. M. Litvinenko & Ch. Abraev

Authors
  1. I. Ya. Dekhtyar
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  2. V. V. Skorokhod
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  3. S. G. Sakharova
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  4. Yu. M. Litvinenko
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  5. Ch. Abraev
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Additional information

Translated from Poroshkovaya Metallurgiya, No. 1(217), pp. 48–52, January, 1981.

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Dekhtyar, I.Y., Skorokhod, V.V., Sakharova, S.G. et al. Positron annihilation in powder metallurgical materials of various degrees of porosity. Powder Metall Met Ceram 20, 38–41 (1981). https://doi.org/10.1007/BF00791908

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  • DOI: https://doi.org/10.1007/BF00791908

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