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藉Ｈ２—ＣＯ２混合气体获得低氧压，在６００℃为１．０１×１０（－４）ｆＰａ，而７００℃与８００℃为１．０１ｆＰａ，并研究含Ｎｂ为１５０与３００ｍｇ／ｇ的两种Ｎｉ－Ｎｂ合金在上述条件下的氧化行为实验结果显示，在６００℃与７００℃，两种合金仅发生内氧化，其组成为α－Ｎｉ与氧化铌（Ｎｂ＿２Ｏ＿５或／和ＮｂＯ＿２）通常，在紧挨内氧化带前沿的合金中并没有观察到发生贫Ｎｂ现象．与之不同，在８００℃氧化的两种合金均产生连续的由氧化铌组成的外氧化膜而没有内氧化现象．从Ｎｂ在Ｎｉ中低溶解度的特点出发讨论了合金的氧化机制．
The low oxygen pressure was obtained with H2-CO2 mixture gas at 1.01 × 10 (-4) fPa at 600 ℃ and 1.01fPa at 700 ℃ and 800 ℃, and two kinds of samples with Nb at 150 and 300 mg / g The experimental results of the oxidation behavior of Ni-Nb alloy under the above conditions showed that only the internal oxidation of the two alloys occurs at 600 ℃ and 700 ℃, and its composition is α-Ni and niobium oxide (Nb 2 O 5 or / and NbO 2) No lean Nb phenomenon was observed in the alloy with the leading edge of the oxidation zone. In contrast, both alloys that were oxidized at 800 ° C yielded a continuous outer oxide film consisting of niobium oxide without internal oxidation. The mechanism of the oxidation of the alloy was discussed based on the low solubility of Nb in Ni.