(中科院金属所 金属腐蚀与防护国家重点实验室， 沈阳 110016)
摘 要: 研究了粉末冶金三元双相Cu-44%Cr-12%Fe（质量分数）合金在800℃时不同氧分压下的氧化行为。 结果表明： Cr含量为44%时合金在1.01×105 Pa的纯氧中并不能形成连续的外Cr2O3膜， 合金的氧化速度随氧分压的降低而降低， 原因是低氧分压有助于抑制合金中Cr的内氧化并形成连续致密的Cr2O3膜。讨论了氧化膜的形成机制。
关键字: 粉末冶金； 三元双相合金； 高温氧化； 低氧分压
（State Key Laboratory for Corrosion & Protection,
Institute of Metal Research,
China Academy of Science, Shenyang 110016, China）
Abstract: The oxidation behavior of a two-phase ternary Cu-44%Cr-12%Fe（mass fraction） alloy prepared by powder metallurgy (PM) was studied at 800℃ under three different oxygen pressures. The surface of alloy with 44%Cr cannot produce a continuous external chromia when pressure of oxygen is 1.01×105 Pa, and the reduction of the oxidation rates at lowered oxygen pressures is obviously attributed to the formation of a continuous and compacted chromia scale. Finally the oxidation formation mechanism under different oxygen pressures was discussed.
Key words: powder metallurgy; two-phase ternary alloy; high temperature oxidation; low oxygen pressure
