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A Study on the Microstructural Characteristics of Tungsten by Boron Addition
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1992, v.5 no.1, pp.127-134
Yoon,
K. H., Kim,
Y. D., Kim,
H. T., Yoo,
M. K., &
Choi,
J.
(1992). A Study on the Microstructural Characteristics of Tungsten by Boron Addition. Analytical Science and Technology, 5(1), 127-134.
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Abstract
Effects of boron addition on microstructure and phases of plasma are melted tungsten have been investigated by optical microscopy, scanning electron microscopy, Auger electron spectroscopy, X-ray diffractometer, measurements of grain size and hardness. The change in the microstructure upon boron addition was studied by optical microscopy. It was observed that the grain refinement was induced upon content within the limit of solubility. When the boron content was above the solubility limit, two phases of primary tungsten and eutectic structure were observed and confirmed by AES and XRD analysis. It was also shown that recrystallization temperature was increased and recrystallized grain size was reduced as boron content increased.
- keywords
- Tungsten-Boron alloys, Plasma Arc Melting, W, B, <TEX>$W_2B$</TEX>, grain refinement
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