含Mo的Ni_3Al-Fe基合金在900-1100℃空气中的氧化行为

中国腐蚀与防护学报

1995, Vol. 15

Issue (2): 100-104

研究报告

本期目录 | 过刊浏览

含Mo的Ni_3Al-Fe基合金在900-1100℃空气中的氧化行为

叶长江;李铁藩;郭建亭;沈嘉年

中国科学院金属腐蚀与防护研究所;腐蚀科学开放实验室

OXIDATION KINETICS OF MOLYBDENUM-CONTAINING Ni_3Al-Fe BASE ALLOY IN AIR AT 900-1100℃

Ye Changjiang; Li Tiefan; Guo Jianting; Shen Jianian(Corrosion Science Laboratory; Institute of Corrosion and Protection of Metals;Chinese Academy of Sciences)

全文: PDF(2137 KB)

摘要: 研究了含Ｍｏ的Ｎｉ３Ａｌ－Ｆｅ基合金在９００－１１００℃空气中的等温氧化行为，利用光学显微镜、ＳＥＭ、ＥＰＭＡ、ＸＲＤ分析了氧化膜的形态和结构．研究表明，含Ｍｏ的Ｎｉ３Ａｌ－Ｆｅ基合金由γ和β相组成．对应于γ相的氧化膜由多相组成，合金元素Ｆｅ和Ｍｏ使得γ相的氧化速率增大，氧化膜的粘附性和内聚力下降，其氧化反应激活能为４２．７ｋＪ／ｍｏｌ，Ｆｅ穿过Ａｌ２Ｏ３氧化层的扩散为氧化反应的速率控制步骤．而β相中的Ｆｅ和Ｍｏ，对其抗氧化性无不利影响，氧化膜仅由Ａｌ２Ｏ３．

关键词 ：含Ｍｏ的Ｎｉ_３Ａｌ－Ｆｅ基合金, γ相, β相, 抗氧化性

Abstract：The isothermal oxidation behavior of molybdenum-containing Ni3Al-Fe base alloy was studied at 900-1100℃ in air. The structure and composition of the oxide scale were investigated by X-ray diffraction,scanning electron microscopy and electron microprobe analyzer etc. The reaction energy of oxidation wascalculated as 42.7kJ/mol. The microstructure of the alloy is composed of γ and β phases. The scale onγ phase was composed of several oxide layers, revealing crystallographic voids. Mo and Fe in γ phaseincreased the oxidation rate of Ni3Al and reduced the adhesion and cohesion of the oxide scale. It is shownthat the oxidation of γ phase followed a parabolic rate law, and unlike other Ni3Al alloy, its oxidationwas controlled by the diffusion of Fe in the oxide layer of Al2O3. The scale on β phase was composed of acontinuous, compact Al2O3 oxide layer, and Mo and Fe in the β phase is harmless to oxidation of β-NiAl.

Key words： Ni_3Al-Fe base alloy γ phase βphase oxidation resistance

收稿日期: 1995-04-25

基金资助:国家８６３计划资助;;国家自然科学基金

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引用本文:

叶长江;李铁藩;郭建亭;沈嘉年. 含Mo的Ni_3Al-Fe基合金在900-1100℃空气中的氧化行为[J]. 中国腐蚀与防护学报, 1995, 15(2): 100-104.
. OXIDATION KINETICS OF MOLYBDENUM-CONTAINING Ni_3Al-Fe BASE ALLOY IN AIR AT 900-1100℃. J Chin Soc Corr Pro, 1995, 15(2): 100-104.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1995/V15/I2/100

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