Rhenium-tungsten wire rod and thermocouple using the same
AssigneesKabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
InventorsHitoshi Aoyama, Hideaki Baba, Kenji Tomokiyo
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Abstract
The rhenium tungsten wire rod according to an embodiment is a wire rod made of a tungsten alloy containing rhenium, wherein a rhenium content is less than 30 wt % in any measurement area of a wire rod body where a unit area is 1 μm in diameter.
Claims7
A rhenium-tungsten wire rod which is a wire rod made of a tungsten alloy containing rhenium, the rhenium-tungsten wire rod having a rhenium content of less than 30 wt % in a unit area at each of 17 points in each of two radial cross-sections of the rhenium-tungsten wire rod, where the unit area is a circle area having 1 μm in diameter, the 17 points comprising intersections (16 points) of four equally spaced concentric circles with two axes and a center (1 point) in said each of two radial cross-sections, the two axes being parallel to a diameter of said each of two radial cross-sections and intersecting each other,
- wherein the rhenium content has a coefficient of variation of 0.10 or less in semi-quantitative analysis using an electron probe microanalyzer EPMA.
Dependencies are inferred from the claim text.