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Online since: May 2007
Authors: Ze Bing Xing, Xiao Lan Ji, Xu Dong Wang, Jing Xia Zou, Zuo-Ren Nie
It is shown that Er-free alloys (Fig.1 a and c) have striking dendrite structures within the grain.
However the Er-containing alloys are still deforming fibrous structure.
It indicated that the fabaceous or sphere Al3Er precipitation phase has the same crystal structure with α-Al matrix.
Al3Er phase belong to L12 (AuCu3) structure and lattice constant is 0.4215nm, which has little lattice mismatch (only about 4.1%) with α-Al matrix.
Carrol Improvements to the strength and corrosion resistance of Al-Mg-Mn Alloys of near-AA5083 chemistry [D] Department of Materials Science and Engineering The Ohio State University 2001, p.33~38 [5] BØrge Forbord , Håkon Hallem , Nils Ryum , Kunt Marthinsen, Materials Science and Engineering A387-389(2004)936~939 [6] John S.
Online since: February 2014
Authors: Shahrul Kamaruddin, Ishak Abdul Azid, Ts Yeoh, Nagappan Annamalai
The contribution of study is exploration on a new definition of PS methodology which is simplified and structured.
The problem seen today is where PS structure is weak and at times leads to a lengthy process.
Therefore, a structured, simplified, model based PS and industry relevant methodology is needed.
So a structured PS method is a key to a success of a problem being solved.
A Computer Assisted Problem SOlving Method For Beginning Chemistry Students.
Online since: September 2019
Authors: Konstanchin D. Savelyev, Valeri Mikhailovich Golod, Cao Dang Le
Structure Diagnostic of Iron-Based Out-of-Peritectic Alloys During Nonequilibrium Crystallization Dang C.Le1,a*, Konstanchin D.Savelyev1,b, Valeriy M.Golod1,c 1Peter the Great St.Petersburg Polytechnic University, 29, Polytechnicheskaya, St.Petersburg, 195251, Russia acaodang0906@gmail.com, bSavelevkd@rambler.ru, clpi2015@mail.ru Keywords: out-of-peritectic alloys, dendritic structure, dendritic branch, secondary dendritic arm spacing, nonequilibrium crystallization, peritectic transformation, multicomponent industrial alloys.
Conditions for dendritic structure formation of alloys (series A and B) with different content of components (Xi = Si, Mn, Cr, Ni).
A similar argument remains valid for series B with the replacement of several parameters (p, k, С0, DS) corresponds structure change of forming crystal lattice (δ-phase/γ-phase).
Lazutova, Development of quantitative methods of assessment of structure of hypoeutectic silumins for forecasting of their mechanical properties, Tsvetnye Metally, (2014)
Kur, Effect of temperature on products of calcium phosphate interaction with carbon in the presence of silica: Thermodynamic simulation, Russian Journal Applied Chemistry, 87 (2014) 696-699
Online since: June 2013
Authors: Elvira Tarasova, Dmitri Šumigin, M. Kudrjašova, A. Krumme
The 1H NMR data confirmed the structure of obtained mono- and mix- cellulose esters.
Structure analysis by means of 1H NMR after acylation revealed the introduction of the alkyl chains into cellulose.
However, the slope of this line is related to the structure and hydrodynamic properties of the samples.
However, it is not so, and it can mean that chemical structure of obtained products is dissimilar from CS.
Whistler (Ed), Methods in Carbohydrate Chemistry, v. 3., Academic Press, New York and London, 1963 [8] S.
Online since: July 2016
Authors: Norashid Aziz, Sudibyo Sudibyo, Fajar Nurjaman
The structure of Taguchi's orthogonal robust design and the results of the measurement and the fractal dimension are tabulated in Table 1.
Two samples were observed at the macroscopic and microscopic structure.
From the single branch of DLA-like structure in Fig. 3a, the aggregate pattern changed to compact dendrite as the magnetic field strength increased as shown in Fig. 3b.
The long cubical structures with less faceting in the image are the tin electrodeposits.
Aziz, Development of semi empirical equation of limiting current for Lead (Pb) Magneto electrodeposition, Procedia Chemistry 16 ( 2015 ) 1 – 7 [6] J.
Online since: July 2022
Authors: Dermot Brabazon, Éanna McCarthy, Valeria Nicolosi, Sithara Pavithran Sreenilayam, Lorcan McKeon, Oskar Ronan, Karsten Fleischer
Supercapacitor structure, having dimension 11 mm x 10 mm, was successfully Aerosol Jet printed on an untreated polymer substrate using as produced LASiS silver nano-colloid.
The conductive structures based on the silver nanoparticle inks can be sintered relatively at low temperature.
Figure 4(b) shows the single layer super capacitor structure on an acetate sheet printed using an AJP 300 Aerosol Jet Printer.
The dimension of the supercapacitor structure shown in Fig. 4(b) is 11 mm x 10 mm (not including the two lines out from either side).
(b) Aerosol Jet printed supercapacitor structure on a polymer sheet (dimension: 11 mm x 10 mm (not including the two lines out from either side)).
Online since: February 2014
Authors: Hong Guan Wu, Hai Feng Li, Guo Xian Yu
Morphology and structure of LaF3 nano-particles were investigated.
The small length scales influence the energy band structure and lead to changes in the associated atomic structure, resulting in quantum confinement.
The morphology and structure were observed on a transmission electron microscope (TEM) with a type of 1200ExⅡ. made by JEOL Co..
Results and discussion 3.1 Nano-particle structure and morphology As shown in Fig.1, LaF3 nano-particles gave a hexagonal crystal pattern and no impurity was observed by comparison with that in the XRD standard card.
Secondly, both element La and F penetrated to the sub-layers, improving their structures.
Online since: August 2010
Authors: Guo Feng Wu, Yi Fei Jiang, Hao Zhang, Bin Wang, He Yu Chen, Jun Wen Pu
This study will use modern analytical testing methods, integrated wood chemistry, wood spectroscopy, wood processing technology and many other interdisciplinary study of knowledge, from the ultrastructural analysis of Urea-Formaldehyde (UF) prepolymer to deal with the wood caused by changes in chemical groups , which reveals the UF prepolymer to address issues of dimensional stability of wood, fixed-wood stripes and deformation mechanism.
In order to investigate functional groups and the structure of the specimen, the FTIR technique was used at frequency of 4000-400 cm-1.
The chemical modified wood with urea-formaldehyde prepolymer changed the structure of wood lignin, cellulose skeleton of combination of chemical bond, so that between the skeleton through the urea-formaldehyde prepolymer for the bridge and the cross-linked together, played a role in enhancing the mechanical properties of wood and increase the dimensionally stability.
Online since: June 2012
Authors: Ye Fa Tan, Ting Xu, Bin Liu
It is found that the coating is in a dense structure state and hard particle phase dispersed evenly.
(a) d=7µm ×1000 (b) d=10µm ×1000       (c) d=40µm ×1 000 (d) d=40µm ×2500 Figure.4.The SEM morphology of Ni-Co/SiC composite coatings with different SiC particle sizes Adding SiC particles makes the soild solution structure of the matrix alloy is no longer continuous, matrix metal and solid particles also become a carrier applied load, solid particles limit matrix metal deformation under external force by mechanical constraints [11], reduce the incidence of adhesive wear and increase the wear resistance of coating.
Beijing: Chemistry Industry Publishing Company. 2001.
Online since: January 2006
Authors: Akira Kishimoto, Kousei Shimokawa
Preferential orientation dependent mechanical and electrical properties in Naββββ-alumina ceramics Akira Kishimoto1 and Kousei Shimokawa 2 1 Department of Applied Chemistry, Faculty of Engineering., Okayama University, 3-1-1 Tsushima-naka, Okayama-shi, 700-8530 Okayama, Japan 2 Inst. of Indust.
The crystal structure of Naβ-alumina is characterized by NaO layers separated by insulating aluminum spinel block layers.
These results can be ascribed to the crystal structure of Naβ-alumina and/or its grain morphology.