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材料研究学报  2011, Vol. 25 Issue (4): 427-432    
  研究论文 本期目录 | 过刊浏览 |
Ni--Cr--Ta--Al--Co--Mo合金在900oC和1000oC的恒温氧化行为
卢旭东1,2, 田素贵1, 于兴福1, 王常鑫2
1.沈阳工业大学材料科学与工程学院 沈阳 110178
2.沈阳理工大学装备工程学院 沈阳 110159
Isothermal Oxidation Behaviour of Ni–Cr–Ta–Al–Co–Mo Alloy at 900oC and 1000oC
LU Xudong1,2,  TIAN Sugui2,  YU Xingfu2,  WANG Changxin1
1.School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110178
2.Equipment Engineering College, Shenyang Ligong University, Shenyang 110159
引用本文:

卢旭东 田素贵 于兴福 王常鑫. Ni--Cr--Ta--Al--Co--Mo合金在900oC和1000oC的恒温氧化行为[J]. 材料研究学报, 2011, 25(4): 427-432.
. Isothermal Oxidation Behaviour of Ni–Cr–Ta–Al–Co–Mo Alloy at 900oC and 1000oC[J]. Chin J Mater Res, 2011, 25(4): 427-432.

全文: PDF(949 KB)  
摘要: 用热重分析法测定了氧化动力学曲线, 并采用XRD和SEM(EDAX)等手段, 研究了Ni12.59Cr6.74Ta4.04Al5.16 Co1.35Mo6.29W合金在900℃和1000℃的高温氧化行为。结果表明, 在氧化初期合金的氧化质量增加较快, 随着氧化时间的延长质量增加的速率逐渐降低, 其氧化动力学曲线符合抛物线规律。在900oC和1000oC氧化形成的氧化膜由三层组成, 外层为Cr2O3, Al2O3, (Ni, Co)Cr2O4和CrTaO4; 中间层为平直的Al2O3层; 内氧化层为Al2O3。在合金的氧化期间, 分布在中间层的富Ta相可抑制基体中Al向外扩散, 并抑制氧化膜的生长, 使氧化速度降低。
关键词 金属材料镍基合金高温氧化氧化动力学    
Abstract:Abstract: By means of measuring the kinetics curves of the oxidation and analysis method of TGA, XRD and SEM/EDAX. An investigation has been made into the oxidation behaviour of a nickel-based superalloy at 900℃ and 1000℃ in air. Results show that the kinetics curves of the alloy oxidizing obey the parabola regularity, and the rate of the mass gaining decrease gradually as the oxidizing time prolongs, and the oxidizing process is mainly controlled by the formation of Cr2O3 and Al2O3 phases. After oxidized at 900℃ and 1000℃, the oxide scales in the alloy consists of three layers, including the outer, middle and internal oxidizing layers, Cr2O3 and a few (Ni,Co)Cr2O4 phases are included in the outer oxide layer, the intermediate layer consists of CrTaO4 phase, and the internal oxide layer is identified as Al2O3 phase. In the period of the alloy oxidizing, the phase containing Ta-richer may restrain the element Al in the matrix diffusing outward, which restrains the growth up of the oxide scales to decrease the oxidizing rate of the alloy.
Key wordsmetallic materials    Ni–based superalloy    high temperature oxidation    oxidizing kinetics
收稿日期: 2010-06-03     
ZTFLH: 

TG132

 
基金资助:

国家自然科学基金50571070资助项目。

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