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- W1992283345 abstract "A conventional vacuum fusion method which is used as a standarization method of oxygen contents in metals has a disadvantage of being time-consuming for degassing the graphite crucibles. The addition of a small amount of Si into the graphite crucible rapidly decreased the oxygen blank, and it was also found that Cr gave the same effect as Si. When the crucible was degassed for 1.8 ks at 2573 K after the addition of Si or Cr, the oxygen blank values were reduced under 5 μg/600 s. This technique was suitable for a rapid and accurate determination of oxygen in metals.The mechanism of the rapid decrease of the oxygen blank was assumed as follows:(1) Rapid evaporation of metals on the wall of the graphite crucible in vacuum at 1673–1973 K.(2) Deep penetration of metals into the graphite crucible.(3) Reaction of metals and the oxide in the graphite crucible.(4) Reaction of metal oxides and graphite.(5) Extraction of carbon monoxide in vacuum." @default.
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- W1992283345 date "1988-01-01" @default.
- W1992283345 modified "2023-10-16" @default.
- W1992283345 title "Effect on the Decrease of Oxygen Blank by the Addition of Silicon or Chromium in Determination of Oxygen by the Vacuum Fusion Method" @default.
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- W1992283345 doi "https://doi.org/10.2320/matertrans1960.29.143" @default.
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