ジルコニウムおよびその合金の炭酸ガスによる酸化

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タイトル別名
  • High Temperature Oxidation of Zirconium and its Alloys in Carbon Dioxide
  • ジルコニウム オヨビ ソノ ゴウキン ノ タンサンガス ニ ヨル サンカ

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抄録

The oxidation rate of reactor-grade pure zirconium, its 2.5% tin alloy and 0.24% iron alloy in carbon dioxide were measured over the temperature range of 650° to 850°C and pressure range of 15 to 760 mmHg using the weight gain method. The results were compared with the oxidation data in oxygen, and expressed as follows: (1) No great difference was found on the initial stage of the oxidation between the oxidation rates in carbon dioxide and in oxygen except 2.5% tin alloys. (2) In the post-breakaway period, the rate constants depended on the change of gas pressure, and the oxidation rates in carbon dioxide were lower than the oxidation rates in oxygen, and remarkably in 2.5% tin alloys. (3) No existence of carbon absorption was found during the oxidation of specimens in carbon dioxide by chemical analysis. (4) It is concluded from the present investigation that the reaction proceeds in accordance with the equation of Zr+2CO2=ZrO2+2CO, and the oxidation in carbon dioxide is similar to the oxidation in lower pressure oxygen.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 24 (9), 608-611, 1960

    公益社団法人 日本金属学会

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