Stability of periodic microstructure and property change of mesoscopic materials of phase-separation type alloys.

相分离型合金介观材料周期性微观结构和性能变化的稳定性。

• 批准号: 07650817
• 负责人: DOI Minoru
• 金额: $ 1.6万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650817/
• 关键词: mesoscopic; phase separation; periodic microstructure; structural stability; multilayr film; bilayr film; rapidly quenched alloy; elasticity effect; 薄膜

1.Microstructure changes during annealing of various kinds of bilayr films on SiO_2 substrates were investigated by means of Auger electron spectroscopy, scanning electron microscopy and transmission electron microscopy. The results are as follows :(1) In the as-deposited state of Ag/Ge, Ag/Si, Al/Ge or Al/Si bilayr films, the inner layris amorphous Ge or Si and the outer layr is polycrystalline Ag or Al. Due to annealing, Ge or Si atoms come out and spread on the free surface forming crystalline Ge or Si clusters.(2) Annealing of Fe/Mo bilayr films brings the formation of FeMo intermetallic compound which is not predicted by the equilibrium phase diagram of Fe-Mo.(3) In the as-deposited state of Cu/Ge bilayr film, the inner layr is amorphous Ge and the outer layr is polycrystalline Cu_3Ge. Due to annealing, the inner Ge layr changes to polycrystalline Cu_3Ge and some Ge atoms come out and form crystalline Ge clusters on the free surface.2.A new calculation method for phase decomposition process based on discrete type diffusion equation was proposed, and two dimensional computer simulations were successfully performed for the phase decomposition in Fe-Mo binary alloy systems by utilizing the new method.3.Ageing behavior of coherent particles such as D0_3 or B2 particles in Fe-base alloys and Ti_3Al particles in Ti-base alloys was investigated and the results indicated that not only the particle coarsening but also the hardness decrease is retarded at the later stage of ageing.4.Dissolution and diffusion of hydrogen and deuterium in Ti, alpha-Ti or Ti_3Al were investigated.

1.用俄歇电子能谱、扫描电子显微镜和透射电子显微镜研究了SiO_2衬底上不同类型双层膜在退火过程中的微结构变化。结果表明：（1）在Ag/Ge、Ag/Si、Al/Ge或Al/Si双层膜的沉积态下，内层为非晶Ge或Si，外层为多晶Ag或Al，由于退火，Ge或Si原子在自由表面扩散，形成晶态Ge或Si团簇。(2)Fe/Mo双层膜退火后形成了FeMo金属间化合物，这是Fe-Mo平衡相图所不能预测的。(3)在Cu/Ge双层膜的沉积状态下，内层为非晶Ge，外层为多晶Cu_3Ge。在退火过程中，内层Ge转变为多晶Cu_3Ge，部分Ge原子逸出，在自由表面形成晶态Ge团簇。2.提出了一种基于离散型扩散方程的相分解过程计算方法，并成功地进行了Fe-100合金相分解的二维计算机模拟。利用新方法研究Mo二元合金体系。3. Fe基合金中D0_3或B2颗粒以及Ti-合金中Ti_3Al颗粒等共格颗粒的时效行为结果表明，时效后期，合金中的颗粒粗化和硬度下降都得到了抑制。4.氢和氘在Ti中的溶解和扩散，α-Ti或Ti_3Al的合金。

项目成果

S.Naito: "Dissolution of hydrogen and deuterium in titanium, Ti_<94>Al_6 and Ti_3Al." J. Chem. Soc., Faraday Trans.91・13. 1967-1973 (1995)

S.Naito：“氢和氘在钛中的溶解，Ti_<94>Al_6 和 Ti_3Al。”J. Chem.，Faraday Trans.91・13（1995）。

T.Miyoshi,S.Naito,M.Yamamoto,M.Doi and M.Kimura: "Diffusion of Hydrogen in Titanium, Ti_<88>Al_<12> and Ti_3Al." J. Chem. Soc., Faraday Trans.92. 483-486 (1996)

T.Miyoshi、S.Naito、M.Yamamoto、M.Doi 和 M.Kimura：“氢在钛、Ti_<88>Al_<12> 和 Ti_3Al 中的扩散。”

M.Doi: "Elasticity effects on the microstructure of alloys containing coherent precipitates." Progress in Materials Science. 40・2. 79-180 (1996)

M.Doi：“含有相干析出物的合金的微观结构的弹性效应。”材料科学进展 79-180 (1996)。

T.Miyoshi, S.Naito, M.Yamamoto, M.Doi and M.Kimura: "Diffusion of hydrogen in titanium, Ti_<88>Al_<12> and Ti_3Al." J.Chem.Soc., Faraday Trans.92-3. 483-486 (1996)

T.Miyoshi、S.Naito、M.Yamamoto、M.Doi 和 M.Kimura：“氢在钛、Ti_<88>Al_<12> 和 Ti_3Al 中的扩散。”

T.Koyama, T.Miyazaki and M.Doi: "A numerical calculation of phase decomposition process based on discrete type diffusion equation." J.Jpn.Inst.Metals.60-6. 553-568 (1996)

T.Koyama、T.Miyazaki 和 M.Doi：“基于离散型扩散方程的相分解过程的数值计算”。