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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Manganese Addition on Reactive Evaporation of Chromium in Ni-Cr Alloys
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Effect of Manganese Addition on Reactive Evaporation of Chromium in Ni-Cr Alloys

机译：锰对镍铬合金中铬反应性蒸发的影响

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摘要

Chromium is used as an alloy addition in stainless steels and nickel-chromium alloys to form protective chromium oxide scales. Chromium oxide undergoes reactive evaporation in high-temperature exposures in the presence of oxygen and/or water vapor. Deposition of gaseous chromium species onto solid oxide fuel-ceil electrodes can reduce the efficiency of the fuel cell. Manganese additions to the alloy can reduce the activity of chromium in the oxide, either from solid solution replacement of chromium with manganese (at low levels of manganese) or from the formation of manganese-chromium spinels (at high levels of manganese). This reduction in chromium activity leads to a predicted reduction in chromium evaporation factors as much as 35 at 800 deg C and 55 at 700 deg C. Quantifying the effects of manganese additions on chromium evaporation should aid alloy development of metallic interconnects and balance-of-plant alloys.
机译：铬在不锈钢和镍铬合金中用作合金添加物，以形成保护性氧化铬水垢。氧化铬在氧气和/或水蒸气的存在下于高温暴露下发生反应性蒸发。将气态铬物质沉积到固体氧化物燃料电池电极上会降低燃料电池的效率。向合金中添加锰会降低氧化物中铬的活性，这可能是通过用锰固溶替代铬（锰含量低）或通过形成了锰铬尖晶石（锰含量高）引起的。铬活度的这种降低导致预计铬的蒸发因子在800摄氏度下降低多达35个，在700摄氏度下降低55个。量化锰添加对铬蒸发的影响应有助于金属互连和合金平衡的发展。植物合金。

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