Control of non-equilibrium microstructure and function of oxide scales formed in high temperature oxidation of metalic materials for high efficiency energy comversion

控制金属材料高温氧化过程中形成的氧化皮的非平衡微观结构和功能,实现高效能量转换

基本信息

  • 批准号:
    16360361
  • 负责人:
  • 金额:
    $ 9.02万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2004
  • 资助国家:
    日本
  • 起止时间:
    2004 至 2006
  • 项目状态:
    已结题

项目摘要

(1)Quantitative prediction of void formation in a growing scales in high temperature oxidationEquations have been proposed for evaluation of chemical potential distribution, ionic fluxes and its divergence in a growing oxide scales. The divergence was proved to be the good measure for evaluating the void formation. The validity was experimentally confirmed in magnetite scales formed in high temperature oxidation of iron.(2)High temperature oxidation of ferritiv Fe-Cr alloys for interconnects in solid oxide fuel cell (SOFC) and electrical conductivity of the oxide scale.Simulating the operation condition of SOFC, high temperature oxidation of Fe-16Cr alloys was conducted in the dual atmosphere, in which specimens were exposed air for the cathode and the mixture of H2O (97%) and H2 (3%) at 1073 K. The continuous protective Cr2O3 scales were formed on both sides. The growth rates were quite similar, indicating the major defect was interstitial ion of Cr in two cases.The estimation of the … More oxygen potential distribution clarified that the oxygen potential is low almost the whole region in scales. This fact predicted the reason why the electrical conductivity of the Cr2O3 scales were high. Applied external currents retarded the growth rate of Cr203 on the cathode and enhanced it on the anode. The equations were proposed for evaluating the scale growth rate under the external current and the equations predicted the growth rate in the long term exposures.(3)Control of microstructure development and design of the function of the scales.The summary of this project is the following(1)The quantitative prediction of microstructure development is possible with diffusion coefficients of constituent ions as a function of oxygen potential.(2)For controlling microstructure, it is dispensable to design the diffusivity. The appropriate doping is an possibility for the design of the microstructure.(3)The evaluation of chemical potential distribution and divergences of ionic fluxes is very powerful for controlling microstructures and designing the function of scales. Less
(1)高温氧化生长膜中空洞形成的定量预测本文提出了计算氧化生长膜中化学势分布、离子通量及其发散度的方程。结果表明,发散度是评价空洞形成的较好指标。铁高温氧化形成的磁铁矿氧化膜实验证实了该方法的有效性。(2)固体氧化物燃料电池(SOFC)连接件用铁素体Fe-Cr合金的高温氧化及氧化膜的导电性模拟SOFC的工作条件,在1073 K下对Fe-16 Cr合金进行了高温氧化实验,实验中试样分别暴露于空气和H_2O(97%)和H_2(3%)的混合气体中。两侧形成连续的Cr2 O3保护膜。生长速率非常相似,表明在两种情况下主要缺陷是Cr的间隙离子。 ...更多信息 氧势分布阐明了在尺度上几乎整个区域的氧势都是低的。这一事实预示了Cr_2O_3氧化皮电导率高的原因。施加的外部电流延缓了阴极上的Cr2 O3的生长速率,并且增强了阳极上的Cr2 O3的生长速率。提出了外电流作用下水垢生长速率的估算公式,并对长期暴露下的水垢生长速率进行了预测。(3)微观结构发展的控制和尺度功能的设计本课题的主要内容如下:(1)利用氧势与组元离子扩散系数的函数关系,可以定量预测微观结构的发展。(2)为了控制微结构,需要设计扩散系数。适当的掺杂是微结构设计的可能性。(3)化学势分布和离子通量发散度的计算对微结构控制和尺度功能设计具有重要意义。少

项目成果

期刊论文数量(29)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Oxygen potential distribution during disappearance of the intemal oxidation zone formed in the steam oxidation of Fe-9Cr-0.26Si ferritic steel at 973 K
Fe-9Cr-0.26Si铁素体钢973 K蒸汽氧化形成的内部氧化带消失过程中的氧势分布
823KにおいてFc-5Cr合金に形成する2層酸化皮膜中における酸素の化学ポテンシャル分布とボイド形成
823K Fc-5Cr合金两层氧化膜中氧化学势分布及空洞形成
Void formation in the growing scale in high temperature oxidation of metals
金属高温氧化过程中空洞的形成规模不断扩大
Hydrogen permeation through Fe-16Cr alloy interconnect in atmospheres simulating SOFC at 1073 K
在模拟 1073 K 下 SOFC 的气氛中氢气通过 Fe-16Cr 合金互连的渗透
Oxidation behavior of Fe–16Cr alloy interconnect for SOFC under hydrogen potential gradient
  • DOI:
    10.1016/j.ssi.2004.02.008
  • 发表时间:
    2004-03
  • 期刊:
  • 影响因子:
    3.2
  • 作者:
    H. Kurokawa;K. Kawamura;T. Maruyama
  • 通讯作者:
    H. Kurokawa;K. Kawamura;T. Maruyama
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MARUYAMA Toshio其他文献

MARUYAMA Toshio的其他文献

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{{ truncateString('MARUYAMA Toshio', 18)}}的其他基金

The steam oxidation mechanism of heat resistant alloys and efficiency improvement of energy conversion processes at high temperature
耐热合金的蒸汽氧化机理及高温下能量转换过程的效率提升
  • 批准号:
    21246108
  • 财政年份:
    2009
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Thermodynamic and Kinetic Stability of Nano-Structure in Ionic Materials and Its Control
离子材料纳米结构的热力学和动力学稳定性及其控制
  • 批准号:
    16079206
  • 财政年份:
    2004
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research on Priority Areas
Mass Transport and Thermodynamics at the Interface in the High-Temperature Metal/Ceramics Composites
高温金属/陶瓷复合材料界面的传质和热力学
  • 批准号:
    09450267
  • 财政年份:
    1997
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
PHYSICAL CHEMISTRY AND MASS TRANSPORT ALONG INTERFACES IN CERAMICS
陶瓷中的物理化学和沿界面的传质
  • 批准号:
    08355011
  • 财政年份:
    1996
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Development of Low-Temperature Processes for High-Temperature Intermetallic Compounds and their microstructure control
高温金属间化合物低温工艺开发及其微观结构控制
  • 批准号:
    07555228
  • 财政年份:
    1995
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Formation of Protective Oxide Scale with High Electrical Conductivity by High Temperature Oxidation of Alloys.
合金高温氧化形成高导电率的保护性氧化皮。
  • 批准号:
    06453084
  • 财政年份:
    1994
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
Modification of Refractory Metals by CVD and Its High Temperatutre Oxidation Resistance
难熔金属的CVD改性及其高温抗氧化性能
  • 批准号:
    01470062
  • 财政年份:
    1989
  • 资助金额:
    $ 9.02万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
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