{111}-specific twinning structures in nonstoichiometric ZrC0.6with ordered carbon vacancies

2012 ◽  
Vol 46 (1) ◽  
pp. 43-47 ◽  
Author(s):  
Wentao Hu ◽  
Shaocun Liu ◽  
Bin Wen ◽  
Jianyong Xiang ◽  
Fusheng Wen ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Electron Diffraction ◽  
Interfacial Energy ◽  
First Principles ◽  
Great Reduction ◽  
Stacking Fault ◽  
First Principles Calculations ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron

Twinning structures in ordered nonstoichiometric ZrC0.6have been investigated experimentally and theoretically.Viatransmission electron microscopy and selected area electron diffraction measurements, {111}-specific twins have been observed. Interestingly, two special types of twinning interfaces,i.e.(111)Cand (111)Zrinterfaces, are recognized to be formed as a result of the presence of ordered carbon vacancies. In contrast to the high stacking fault energy for twinning formation in stoichiometric ZrC, first-principles calculations indicate that the presence of ordered carbon vacancies leads to a great reduction in the twinning interfacial energy, thus favouring the stabilization of twinning structures in the ordered ZrC0.6.

HRTEM Investigation of Precipitates in Al-Zn-In-Mg-Ti-Ce Anode Alloy

2011 ◽  
Vol 189-193 ◽  
pp. 1036-1039
Author(s):  
Jing Ling Ma ◽  
Jiu Ba Wen ◽  
Yan Fu Yan
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Electron Diffraction ◽  
Hexagonal Structure ◽  
Orientation Relation ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Scanning Electron

The precipitates of Al-5Zn-0.02In-1Mg-0.05Ti-0.5Ce (wt %) anode alloy were studied by scanning electron microscopy, X-ray microanalysis, high resolution transmission electron microscopy and selected area electron diffraction analyses in the present work. The results show that the alloy mainly contains hexagonal structure MgZn2 and tetragonal structure Al2CeZn2 precipitates. From high resolution transmission electron microscopy and selected area electron diffraction, aluminium, Al2CeZn2 and MgZn2 phases have [0 1 -1]Al|| [1 -10]Al2CeZn2|| [-1 1 0 1]MgZn2orientation relation, and Al2CeZn2 and MgZn2 phases have the [0 2 -1]Al2CeZn2|| [0 1 -10]MgZn2orientation relation.

Synthesis of Bamboo-Shaped Gallium Nitride Nanorods

2005 ◽  
Vol 475-479 ◽  
pp. 3575-3578
Author(s):  
Zhi Zhong Dong ◽  
Haiyong Gao ◽  
Cheng Shan Xue ◽  
Zhi Hua Dong ◽  
Jian Ting He
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
High Resolution ◽  
Electron Diffraction ◽  
Average Length ◽  
Rf Magnetron Sputtering ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Infrared Spectrophotometer

Heagonal GaN nanorods have been synthesized through ammoniating ZnO/Ga2O3 films deposited by radio frequency(rf) magnetron sputtering on Si(111) substrates.X-ray diffraction(XRD), Fourier transform infrared spectrophotometer (FTIR), transimission electron microscopy(TEM), high-resolution transmission electron microscopy(HRTEM) and selected-area electron diffraction (SAED) are used to analyze the structure,composition and morphology of the synthesized GaN nanorods. TEM result shows that GaN nanorods own bamboo-shaped morphalogy and have a single-crystal hexagonal wurtzite structure.The average length and dimeter of the nanorods are 3μm and 50 nm espectively.Ga2O3 and NH3 reactived directly and synthesized GaN nanorods without any catalyzer and the process of space-confined reactions.

MICROSTRUCTURE STUDY OF ROD-LIKE NANOCRYSTALLINE RUTILE TiO2 SYNTHESIZED BY SONOCHEMICAL METHOD

2004 ◽  
Vol 03 (06) ◽  
pp. 891-896
Author(s):  
J. M. ZHU ◽  
S. S. HUANG ◽  
G. B. MA ◽  
X. H. ZHU ◽  
S. H. ZHOU ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Electron Diffraction ◽  
Sonochemical Method ◽  
Rutile Tio2 ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron

Rutile TiO 2 nanorods have been successfully prepared by a sonochemical method. The microstructures of TiO 2 nanorods were investigated in detail by transmission electron microscopy (TEM), selected area electron diffraction (SAED) and high-resolution transmission electron microscopy (HREM). Probable mechanisms for the sonochemical formation of TiO 2 nanorods are proposed.

scholarly journals Advanced Characterization of Silica–Encapsulated Aluminum Pigments

2019 ◽  
Vol 65 (1) ◽  
pp. 61-71
Author(s):  
Draga Dragnea ◽  
Dragos Gudovan ◽  
Elena Zaharia ◽  
Ion Dragnea ◽  
Costin Sorin Bildea
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Optical Properties ◽  
Electron Diffraction ◽  
Operating Conditions ◽  
Gravimetric Analysis ◽  
Silica Layer ◽  
Physical Methods ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron

For environmental reasons, the paints industry shifts from solvent-borne towards water-borne formulations. This change is challenging the business of aluminum pigments, as the hydrogen released by the reaction of aluminum with water degrades the optical properties, besides being a safety concern. In this work, industrial-grade aluminum pigments are encapsulated, by a well-known method, in a silica matrix by sol-gel process using isopropanol - a more suitable solvent for the industry. The effectiveness of the encapsulation process is proven by advanced physical methods (Scanning Electron Microscopy, Energy Dispersive X-Ray Analysis, Selected Area Electron Diffraction, Fourier Transformed InfraRed Spectroscopy, Thermo-Gravimetric Analysis) and by industry-relevant tests (stability in water, hiding power, flop and granulometry). Moreover, advanced surface-applied physical methods (High Resolution Transmission Electron Microscopy combined with Selected Area Electron Diffraction and Scanning Transmission Electron Microscopy, and FT-IR microscopy) clearly show the homogeneity of the resulting pigments, a quality which is highly desirable for practical applications. The results demonstrate that stability comparable to that of pigments passivized by chromium-based inhibitors is easily achieved, for a variety of operating conditions. However, accomplishing a homogeneous silica layer of the right thickness is the determining factor for good optical properties.

Self-Precipitated Process of Te Nanowire from Zr-Doped Sb2Te3 Film

2016 ◽  
Vol 848 ◽  
pp. 489-493
Author(s):  
Yong Hui Zheng ◽  
Yan Cheng ◽  
Zhi Tang Song ◽  
Wei Jun Yin ◽  
Min Zhu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Electron Diffraction ◽  
Annealing Process ◽  
Bright Field ◽  
Single Crystalline ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron

By using Zr6.5(Sb2Te3)93.5 film, Te nanowires with a diameter of 5 to 30 nm were fabricated through annealing process. The results of the bright field TEM images, selected area electron diffraction (SAED) and high resolution transmission electron microscopy (HRTEM) demonstrated that the nanowire fitted well with Te hexagonal Te (P3121) structure. The EDS mapping implies that Zr element bonded with Te element and induced the formation of single crystalline Te nanowire during the annealing process.

Sign in / Sign up

Export Citation Format

Share Document