Tungsten alloy part, and discharge lamp, transmitting tube, and magnetron using the same
According to one embodiment, a tungsten alloy includes 0.1 to 5 wt % of Zr in terms of ZrC.
1. A tungsten alloy part used for a discharge lamp part, a transmitting tube part, or a magnetron part, the tungsten alloy part comprising tungsten and 0.1 to 5 wt % Zr in terms of ZrC,
wherein contents of Zr, ZrC and C are expressed as ZrC x where 0<×<1, and
wherein the tungsten alloy part satisfies C1<C2, where C1 is an amount of carbon in a surface part of the tungsten alloy part, and C2 is an amount of carbon in a central part of the tungsten alloy part, and units of C1 and C2 are wt %.
2. A discharge lamp comprising the tungsten alloy part according to claim 1 .
3. A transmitting tube comprising the tungsten alloy part according to claim 1 .
4. A magnetron comprising the tungsten alloy part according to claim 1 .
5. The tungsten alloy part according to claim 1 , wherein a value of C1/C2 falls within a range from 0.40/0.55 to 0.57/0.65.