Fig.9-27　Cross-sectional SEM images, temperature dependences of high-temperature hardness, and thermal conductivities of double-pass FSPed VPS-W, as-VPS-W, and bulk-W

Fig.9-27 Cross-sectional SEM images, temperature dependences of high-temperature hardness, and thermal conductivities of double-pass FSPed VPS-W, as-VPS-W, and bulk-W

Fig.9-27　Cross-sectional SEM images, temperature dependences of high-temperature hardness, and thermal conductivities of double-pass FSPed VPS-W, as-VPS-W, and bulk-W

Grains become more equiaxed and uniform in the double-pass FSPed VPS-W (a); the FSPed VPS-W is harder than bulk-W and VPS-W in all temperature ranges (b); and the thermal conductivity of the FSPed VPS-W is 80% of that of bulk-W at 200 ℃ and becomes equivalent to that of bulk-W at 800 ℃ (c).

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