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Identification of embrittling trace impurities in tungsten heavy alloys by SIMS

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Abstract

Embrittlement of tungsten heavy alloys is often caused by trace impurities. Heavy alloys containing O, Al and Si, respectively, were mechanically tested and exhibited interfacial embrittlement. SIMS analysis of metallographic sections was found to be a suitable tool for comparative analysis of heavy alloys with different fracture behaviour, the results obtained being not dependent on the fracture mode as is the case e.g. with AES. It was found that oxygen may cause embrittlement at the interfaces even at low overall content, since it is enriched at the phase boundaries tungsten-binder. Al is detrimental if it covers the interfaces rather evenly; grossly inhomogeneous distribution is less harmful. Generally, the distribution of trace elements is much more important than their total amount.

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Author notes

  1. Erich Kny

    Present address: Forschungszentrum Seibersdorf, A-2444, Seibersdorf, Austria

Authors and Affiliations

  1. Institut für Chemische Technologie anorganischer Stoffe, Technische Universität Wien, A-1060, Wien, Austria

    Herbert Danninger, Abdolvahab Atari, Benno Lux, Erich Kny, Gernot Friedbacher & Manfred Grasserbauer

  2. Metallwerk Plansee GmbH, A-6600, Reutte, Austria

    Erich Kny

  3. Institut für Analytische Chemie, Technische Universität Wien, A-1060, Wien, Austria

    Gernot Friedbacher & Manfred Grasserbauer

Authors
  1. Herbert Danninger
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  2. Abdolvahab Atari
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  3. Benno Lux
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  4. Erich Kny
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  5. Gernot Friedbacher
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  6. Manfred Grasserbauer
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Danninger, H., Atari, A., Lux, B. et al. Identification of embrittling trace impurities in tungsten heavy alloys by SIMS. Mikrochim Acta 108, 163–172 (1992). https://doi.org/10.1007/BF01242426

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  • DOI: https://doi.org/10.1007/BF01242426

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