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金属学报  1996, Vol. 32 Issue (3): 294-302    
  论文 本期目录 | 过刊浏览 |
Fe-Nb合金在600-800℃,0.1MPa纯氧中的氧化
牛焱;吴维
中国科学院金属腐蚀与防护研究所;金属腐蚀与防护国家重点实验室
OXIDATION OF Fe-Nb ALLOYS UNDER 0.1 Mpa PURE OXYGEN AT 600─800℃
NIU Yan; WU Weitao; FGESMUNDO; FC.RIZZO;(State Key Laboratory for Corrosion and Protection; Institute of Corrosion and Protection of Metals; Chinese Academy of Sciences; Shenyang 1 100015 )(Istituto di Chimica; Facolta di Ingegneria; Universita' di Genova; Fiera del Mare;Pad. D; 16129 Genova; Italy )(Departamento de Ciencia dos Materiais e Metalurgia; Pontificia Universidade Catolica do Rio de Janeiro; Caixa Postal 38008; 22453-900; RJ; Brazil )(Manuscript received 1995-05- 19; in revised form 1 995-09-08)
引用本文:

牛焱;吴维. Fe-Nb合金在600-800℃,0.1MPa纯氧中的氧化[J]. 金属学报, 1996, 32(3): 294-302.
, . OXIDATION OF Fe-Nb ALLOYS UNDER 0.1 Mpa PURE OXYGEN AT 600─800℃[J]. Acta Metall Sin, 1996, 32(3): 294-302.

全文: PDF(747 KB)  
摘要: 研究了Fe-15Nb和Fe-30Nb合金在600-800℃,0.1MPa纯氧中的氧化行为。结果表明,氧化过程遵循近似的抛物线规律,与相同条件下的纯铁相比,合金的氧化速率常数低得多,所生成的外氧化膜为弥散的二元Fe-Nb氧化物和Fe2O3,但不含有FeO与Fe3O4.合金不发生内氧化和Nb的局部贫化现象,基于Fe-Nb-O三元相图,考虑到Nb在基体金属中的低溶解度和合金为两相组织的影响,讨论了氧化特点
关键词 Fe-Nb合金高温氧化纯氧    
Abstract:The oxidation of two Fe-Nb alloys containing 15 and 30% Nb(mass fraction) has been studied at 600─800℃ under 0.1 MPa pure oxygen.The reaction followed the parabolic rate law to a reasonable approximation with rate constants much lower than that for the oxidation of pure iron under the same condition. Internal oxidation and depletion of niobium in the alloy have not been observed. The external scales were composed of Fe2O3 and a dispersion of double Fe-Nb oxide, while FeO and Fe2O3 were not observed.The oxidation behavior of these alloys is interpreted with reference to an approximate phase diagram of the ternary system Fe-Nb-O, taking into account the effects of the low solubility of niobium in the base metal and of the presence of two metallic phases in the alloy. Correspondent: NIU Yan, State Key Laboratory for Corrosion and Protection, ICPM Shenyang 110015
Key words Fe-Nb alloy    high temperature oxidation    pure oxygen
收稿日期: 1996-03-18     
基金资助:欧洲共同体委员会资助;;意大利MURST的资助
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