Zobrazeno 1 - 6
of 6
pro vyhledávání: '"R. C. Koo"'
Publikováno v:
Journal of the Illuminating Engineering Society. 3:317-322
The “nucleation” of a localized hot spot which causes burnout of an incandescent lamp filament is considered. It is proposed that the bubbles filled with potassium vapor in doped, non-sag tungsten filaments migrate unidirectionally in a temperatu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe304c0b92b36a80da8454a75f1d960e
https://doi.org/10.1080/00994480.1974.10732267
https://doi.org/10.1080/00994480.1974.10732267
Autor:
R. C. Koo, John Woodhouse
Publikováno v:
Journal of the Illuminating Engineering Society. 4:19-24
Preliminary results of life tests on microminiature lamps and observations on dc notch formation show that longer lamp life can be achieved by improving the vacuum during exhaust. Experimental results show that early burn-out of filaments heated by d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd6cd54dbd785ac7edcf5bf54e314827
https://doi.org/10.1080/00994480.1974.10732283
https://doi.org/10.1080/00994480.1974.10732283
Autor:
R. C. Koo, D. M. Moon
Publikováno v:
Metallurgical Transactions. 2:2115-2122
The mechanisms and kinetics of bubble formation that occur during annealing of tungsten doped with small amounts of K, Al, and Si compounds has been investigated by electron microscopy. Bubbles are present in the sintered ingot due to volatilization
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44b79ecaea0767a790814237cff31041
https://doi.org/10.1007/bf02917539
https://doi.org/10.1007/bf02917539
Autor:
R. C. Koo
Publikováno v:
Journal of Applied Physics. 37:2764-2768
An experiment has been carried out to demonstrate that the orientation relationship between subgrains can be deduced from dark‐field microscopy. When a specimen is tilted in dark field with a g vector perpendicular to the tilting axis, contrast rev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c82e0c8df1617872116c32ee902be714
https://doi.org/10.1063/1.1782118
https://doi.org/10.1063/1.1782118
Publikováno v:
Journal of the Illuminating Engineering Society. 2:387-395
Tungsten wire for incandescent lamp filaments is manufactured with rigorous control of trace impurities known to be detrimental to lamp performance. The finished coiled filaments, however, do not always retain the original purity of the tungsten wire
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9eb3f9e56dd7f94e551b598730cabf20
https://doi.org/10.1080/00994480.1973.10747733
https://doi.org/10.1080/00994480.1973.10747733
Publikováno v:
Applied Physics Letters. 5:133-135
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f17d3ec152e5683318af911e7a25e42d
https://doi.org/10.1063/1.1754085
https://doi.org/10.1063/1.1754085