Rare earth (RE) atoms were permeated into the surface of Al bronze (Cu-7. gA1-1. 9 Sn) by the method of chemical heat treatment. The permeated layer was then analysed by TEM (Transmission Electron Microscope) , EPMA (...Rare earth (RE) atoms were permeated into the surface of Al bronze (Cu-7. gA1-1. 9 Sn) by the method of chemical heat treatment. The permeated layer was then analysed by TEM (Transmission Electron Microscope) , EPMA (Electronic Probe Microanalysis) and IMA (Ion Microprobe Appratus). The results show that CuREAl and dispersed η phase (Cu6Sn5) distribute in the layer, RE content decreases in the depth direction, and alloying elements (Al, Sn) are enriched in the outer layer and dilute in the second layer.展开更多
Atomic layer deposition （ALD） technique is used in the preparation of organic/inorganic layers, which requires uniform surfaces with their thickness down to several nanometers. For film with such thickness, the grow...Atomic layer deposition （ALD） technique is used in the preparation of organic/inorganic layers, which requires uniform surfaces with their thickness down to several nanometers. For film with such thickness, the growth mode defined as the arrangement of clusters on the surface during the growth is of significance. In this work, Al2O3 thin film was deposited on various interfacial species of pre-treated polyethylene terephthalate （PET, 12 μm） by plasma assisted atomic layer deposition （PA-ALD）, where trimethyl aluminium was used as the Al precursor and O2 as the oxygen source. The interracial species, -NH3, -OH, and -COOH as well as SiCHO （derived from monomer of HMDSO plasma）, were grafted previously by plasma and chemical treatments. The growth mode of PA-ALD Al2O3 was then investigated in detail by combining results from in-situ diagnosis of spectroscopic ellipsometry （SE） and ex-situ characterization of as-deposited layers from the morphologies scanned by atomic force microscopy （AFM）. In addition, the oxygen transmission rates （OTR） of the original and treated plastic films were measured. The possible reasons for the dependence of the OTR values on the surface species were explored.展开更多
文摘Rare earth (RE) atoms were permeated into the surface of Al bronze (Cu-7. gA1-1. 9 Sn) by the method of chemical heat treatment. The permeated layer was then analysed by TEM (Transmission Electron Microscope) , EPMA (Electronic Probe Microanalysis) and IMA (Ion Microprobe Appratus). The results show that CuREAl and dispersed η phase (Cu6Sn5) distribute in the layer, RE content decreases in the depth direction, and alloying elements (Al, Sn) are enriched in the outer layer and dilute in the second layer.
基金supported by National Natural Science Foundation of China (No.11175024)Beijing Natural Science Foundation (No.1112012),2011BAD24B01+1 种基金Scientific Research Common Program of Beijing Municipal Commission of Education(KM201110015008,KM201010015005)Funding Project for Academic Human Resources Development in Institutions of Higher Learning Under theJurisdiction of Beijing Municipality (PHR20110516)
文摘Atomic layer deposition （ALD） technique is used in the preparation of organic/inorganic layers, which requires uniform surfaces with their thickness down to several nanometers. For film with such thickness, the growth mode defined as the arrangement of clusters on the surface during the growth is of significance. In this work, Al2O3 thin film was deposited on various interfacial species of pre-treated polyethylene terephthalate （PET, 12 μm） by plasma assisted atomic layer deposition （PA-ALD）, where trimethyl aluminium was used as the Al precursor and O2 as the oxygen source. The interracial species, -NH3, -OH, and -COOH as well as SiCHO （derived from monomer of HMDSO plasma）, were grafted previously by plasma and chemical treatments. The growth mode of PA-ALD Al2O3 was then investigated in detail by combining results from in-situ diagnosis of spectroscopic ellipsometry （SE） and ex-situ characterization of as-deposited layers from the morphologies scanned by atomic force microscopy （AFM）. In addition, the oxygen transmission rates （OTR） of the original and treated plastic films were measured. The possible reasons for the dependence of the OTR values on the surface species were explored.
