| 低压预处理对TiAl抗氧化性的影响 |
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| 引用本文： | 曲恒磊,周廉,魏海荣. 低压预处理对TiAl抗氧化性的影响[J]. 腐蚀科学与防护技术, 2000, 12(5): 280-283 |
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| 作者姓名： | 曲恒磊 周廉 魏海荣 |
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| 作者单位： | [1]西北有色金属研究院,西安 [2]东北大学,沈阳 |
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| 摘 要： | 对５种ＴｉＡｌ基合金进行了１０＾－３Ｐａ／１０４０℃／９ｈ／ＦＣ（炉冷）表面预处理。随后进行的９００℃静止空气中１００ｈ断续氧化实验表明,ＴｉＡｌ的抗氧化性不但没有提高,反而明显下降。抗氧化性下降的主要原因在于低压预处理过程中合金元素（尤其是铝元素）的选择性蒸发导致ＴｉＡｌ表面活化并形成Ｔｉ３Ａｌ相,而Ｔｉ３Ａｌ的抗氧化性较差,从而使ＴｉＡｌ整体氧化增重增加。
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| 关 键 词： | TiAl基合金 抗氧化性 选择性蒸发 |
| 文章编号： | 1002-6495(2000)05-0280-04 |
| 修稿时间： | 1999-11-17 |
EFFECT OF LOW OXYGEN PARTIAL PRESSURE PRETREATMENT ON INTERRUPTED OXIDATION BEHAVIOR OF TiAI-BASED ALLOYS |
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| QU Henglei,ZHOU Lian,WEI Hairong. EFFECT OF LOW OXYGEN PARTIAL PRESSURE PRETREATMENT ON INTERRUPTED OXIDATION BEHAVIOR OF TiAI-BASED ALLOYS[J]. Corrosion Science and Protection Technology, 2000, 12(5): 280-283 |
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| Authors: | QU Henglei ZHOU Lian WEI Hairong |
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| Affiliation: | QU Henglei,ZHOU Lian,WEI Hairong * |
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| Abstract: | Surface pretreatment of %48Al, Ti-50Al,X-52Al, Ti-48Al-1Cr and Ti-48Al-4G (at% ) has been performed in Pa envimnnent at 1040 "C for 9 hours.The reason why the pretreamnt lowered the resistance to interrupted oxidation of TA-based alloys at 900°C lies in that there are no oxides (especially A12Q) existing on the treated surface, but only intergmnular cracked a2-Ti3Al phase, which exhibits a poor anti-cotidation ability. The phenanenon is resulted fmn selective evaporation of alloy elements and related oxides, especially sublimation of aluminum. |
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| Keywords: | TiAl based alloys pretreatment oxidation resistance selective evaporation |
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