Abstract
The fracture surface of industrial tungsten wires containing potassium second phases were investigated by AES. The average size and number of potassium second phases were determined by TEM. Potassium was the main component of the fracture surface and its amount varied on the differently heat treated wires. Utilizing the TEM results the average surface concentration was estimated supposing that the fracture is independent of the potassium second phases. The measured value was higher showing that the fracture path is partly determined by the potassium second phases.
The high surface concentration of the potassium was explained by surface diffusion.
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References
M. Menyhárd, Proceeding of “Surface Analysis 79” (Karlovy Vary 1979 ed. D. Stulik) p. 38/1.
D. B. Snow, Met. Trans.,A7, 783, 1976.
L. Schreiner, 8. Plansee Seminar (Reutte, 1974).
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Kele, A., Menyhárd, M. On the fracture of doped tungsten. Acta Physica 49, 127–132 (1980). https://doi.org/10.1007/BF03158726
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DOI: https://doi.org/10.1007/BF03158726