| 低氧分压系统及其在二元合金选择性氧化中的应用 |
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| 引用本文： | 彭晓 周龙江. 低氧分压系统及其在二元合金选择性氧化中的应用[J]. 中国腐蚀与防护学报, 1996, 16(2): 140-144 |
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| 作者姓名： | 彭晓 周龙江 |
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| 作者单位： | 中国科学院金属腐蚀与防护研究所腐蚀与防护国家重点实验室 |
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| 基金项目： | 国家自然科学基金,国家高技术新材料专家委员会资助 |
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| 摘 要： | 根据氧化锆陶瓷管材在高温（〉８７３Ｋ）时，因管壁内外的氧分压下同形成氧浓差电池（Ｐｔ，Ｏ２（Ｐ＾ＩＯ２）│ＺｒＯ２│空气（Ｐ＾ＩＯ２），Ｐｔ的原理，研制了可控氧分子（Ｏ２）发射量的低氧分压发生系统。用该系统对Ｎｉ２０Ｃｒ合金进行低氧分压预氧处理后，促进了Ｃｒ在１２７３Ｋ时的选择性氧化，提高了合金的抗氧化性能，在低氧分压下，Ｃｕ１．５Ａｌ合金发生了Ａｌ的选择性内氧化。
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| 关 键 词： | 低氧分压系统 二元合金 氧化 |
A LOW OXYGEN PARTIAL PRESSURE APPARTUS AND ITS APPLICATION TO THE STUDY OF SELECTIVE OXIDATION OF BINARY ALLOYS |
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| Peng Xiao, Zhou Lonajiang, Li Tiefan, Chen Quanfang, Li Meishuan, Ma Xinqing. A LOW OXYGEN PARTIAL PRESSURE APPARTUS AND ITS APPLICATION TO THE STUDY OF SELECTIVE OXIDATION OF BINARY ALLOYS[J]. Journal of Chinese Society For Corrosion and Protection, 1996, 16(2): 140-144 |
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| Authors: | Peng Xiao Zhou Lonajiang Li Tiefan Chen Quanfang Li Meishuan Ma Xinqing |
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| Abstract: | An apparatus which could provide a low oxygen pressure was developed. The unit worked on the basis of an oxygen concentration cell (-)Pt, O2(P)|ZrO2(s)|air(P ), Pt( ). The oxygen pressure at the outlet of the apparatus was dependent on temperature, discharge current of the Oxygen concentration cell (which, in turn, was determined by the external electrical resistance) and the flow volume of the carrier gas. Atmosphere thus produced was aPPlied to examine the selective okidation behavior of two binary alloys. Oxidation pretreatment of Ni20Cr under low oxygen pressure improved its oxidation resistance due to the selective oxidation of chromium. Internal oxidation of aluminium might take plaCe in Cu1.5Al under such a low Oxygen pressure. |
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| Keywords: | Low oxygen partial pressure apparatus Selective oxidation Internal oxidation Ni20Cr Cu1.5Al Binary alloy |
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