Preparation of Metal Films Containing Nano-Size Channels

含有纳米尺寸通道的金属薄膜的制备

• 批准号: 13650713
• 负责人: TANIMOTO Hisanori
• 金额: $ 1.28万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650713/
• 关键词: nanocrystalline materials; porous materials; interface effect; nano-filter; gas-deposition method; metallic membrane

Metallic films prepared by consolidation of ultra-fine particles may contain nano-size pores and channels along the grain boundaries, and they are expected for the application to metallic nano-filters or catalytic materials. In order to prepare the metallic films containing nano-size channels, low-density nanocrysatlline (n-) Au films were prepared by applying the gas-deposition method. The density of n-Au films prepared was about 93 〜 98 % of the bulk Au density and the mean grain size about 10 〜 20 nm. Some of the n-Au films showed gas-permeability of about 10^<-11> mol m/(Pa m^2 s) for helium gas at room temperature, that is larger by mare than two order than those of the plastic films such as the natural rubber. Pore-like dimples with the diameter of 〜 20 nm were found in the STM surface images of n-Au films with the high gas-permeability. The gas-permeability of the n-Au films was decreased in proportional to the square root of the molecular weight of gas. These observations suggest that the gas-permeability of the present n-Au films is due to the channels with the diameter of 〜 20 nm and the area fraction of 〜 1%, where the gas atoms are assumed to permeate the n-Au films as a molecular flow. Further, the n-Au films with the relative density of 〜 95 % showed a high thermal stability, i.e. the mean grain size remained to be about 40 nm after the annealing at 1200 K for 1.8 ks. It suggests that the nano-channels or pores in the specimens play an important role on the high-thermal stability of the present n-Au films

通过固结超细颗粒制备的金属膜可能沿晶界包含纳米大小的毛孔和通道，并且期望它们适用于金属纳米过滤器或催化材料。为了准备含有纳米尺寸通道的金属膜，通过应用气体沉积方法制备低密度纳米晶（N-）AU膜。制备的N-AU膜的密度约为散装Au密度的93％至98％，平均晶粒尺寸约为10至20 nm。一些N-AU膜显示出在室温下的气体渗透性约为10^<-11> mol m/（pa m^2 s）的氦气，这比母马大于两阶，而不是天然橡胶等塑料膜。在具有高气化性的N-AU膜的STM表面图像中发现了直径约为20 nm的孔状凹痕。 N-AU膜的气体渗透性与气体分子量的平方根成正比降低。这些观察结果表明，当前N-AU膜的气体渗透性是由于直径约为20 nm的通道造成的，面积分数为〜1％，其中假定气原子以分子流渗透N-AU膜。此外，相对密度约为95％的N-AU膜显示出较高的热稳定性，即，在退火在1200 K下退火后，平均晶粒尺寸为1.8 ks。这表明标本中的纳米通道或毛孔在当前N-AU膜的高热稳定性上起着重​​要作用

项目成果

H.Tanimoto: "Anelasticity Study on Motions of Atoms in the Grain Boundary Regions in Nanocrystalline Gold"Mater.Trans.. 44. 53-58 (2003)

H.Tanimoto：“纳米晶金晶界区域原子运动的迟弹性研究”Mater.Trans.. 44. 53-58 (2003)

H.Tanimoto: "Characteristic Mechanical Properties of High-Density Nanocrystalline Gold"Proceedings of Int.Conf.on Advanced Technology in Experimental Mechanics 2003 (ATEM'03). OS06W0396. 6 (2003)

H.Tanimoto：“高密度纳米晶金的特征机械性能”2003 年实验力学先进技术国际会议论文集 (ATEM03)。

H.Tanimoto: "Anelasticity of Nanocrystalline Metals"Materials Science and Engineering A. 370. 135-141 (2004)

H.Tanimoto：“纳米晶金属的迟弹性”材料科学与工程 A. 370. 135-141 (2004)

H.Tanimoto: "Characterization and Mechanical Properties of High-Density Nanocrystalline Copper"Proceedings of Int.Conf.on Advanced Technology in Experimental Mechanics 2003 (ATEM'03). OS06W0399 (2003)

H.Tanimoto：“高密度纳米晶铜的表征和机械性能”2003 年实验力学先进技术国际会议论文集 (ATEM03)。

H.Tanimoto: "Characterization and Elastic Property of High-Density Nanocrystalline Gold Prepared by Gas-Deposition Method"Mater. Trans.. 44. 94-103 (2003)

H.Tanimoto：“气体沉积法制备的高密度纳米晶金的表征和弹性”材料。