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The total he mispherical e mittance of specimens of t hree a lloys, In co nol and types 321 and 430 stainless t eel, in six differen t surface conditions, was evaluated at te mperatures in t he range 200 to 1,000 0 by a modification of t he hot filament m ethod. The surface conditions were (1) polished, (2) sandblasted , (3) polished and t hen oxidi ze d, (4) sandblasted and t hen oxidized, (5) coated with NBS coating A-418, a nd (6) coated with NBS coating N-143.
Richmond et al. (Sun,) studied this question.
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