| 定向凝固Ni_3Al－Mo基合金高温氧化研究 |
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| 引用本文： | 叶长江,李铁藩,沈嘉年,毛晓禹. 定向凝固Ni_3Al－Mo基合金高温氧化研究[J]. 金属学报, 1994, 30(1): 44-48 |
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| 作者姓名： | 叶长江 李铁藩 沈嘉年 毛晓禹 |
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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科学开放实验室 |
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| 摘 要： | 利用热天平连续称重，研究了Ｎｉ３Ａｌ－Ｍｏ基合金（ＩＣ－６）在１２７３，１３７３Ｋ的空气中恒温３００ｈ的氧化行为．用ＥＰＭＡ及ＸＲＤ分析了氧化层的结构和成分，；ＩＣ－６合金的氧化层中包括ＮｉＡｌ２Ｏ４，ＮｉＭｏＯ４，ＭｏＯ２相．氧向内扩散及ＭｏＯ２氧化形成挥发性ＭｏＯ３同时影响着ＩＣ－６合金的氧化进程，氧化反应方程式可表示为：理论方程与实验数据吻合较好．ＭｏＯ３在１２７３、１３７３Ｋ的挥发速率常数分别为３．２７×１０－５和２．５５×１０－４ｍｇ／ｃｍ２·ｓ．
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| 关 键 词： | IC－6合金，高温氧化，抛物线速率常数K_p，挥发速率常数K_s |
| 收稿时间： | 1994-01-18 |
| 修稿时间： | 1994-01-18 |
HIGH TEMPERATURE OXIDATION BEHAVIOR OF DS Ni_3Al-Mo BASE ALLOY |
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| YE Changjiang,LI Tiefan,SHEN.Jianian,MAO Xiaoyu. HIGH TEMPERATURE OXIDATION BEHAVIOR OF DS Ni_3Al-Mo BASE ALLOY[J]. Acta Metallurgica Sinica, 1994, 30(1): 44-48 |
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| Authors: | YE Changjiang LI Tiefan SHEN.Jianian MAO Xiaoyu |
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| Abstract: | A study of oxidation kinetics of DS Ni3Al-Mo base alloy(IC-6) have been carried out in thermobalance at 1273 and 1373 K in air for 300 h.The structure and composition of the oxide were examined by EPMA and XPD analyses.The oxide oxidation of IC-6 alloy can be described as a system in which both oxygen inward diffusion of oxidation of IC-6alloy:is in good agreement with experimental data.The volatilization rate constant of MoO3 was calculated qualitatively,as Ks=3.27×10-4mg/cm2·s at 1273 and 1373K respectively.Correspondent:YE Changjiang,(Institute of Corrosion and Protection of Metals,Chinese Academy of Sciences,Shenyang 110015) |
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| Keywords: | DS Ni_3Al-Mo alloy high temperature oxidation parabolic rate constant volatilization rate coustant |
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