Experimental Investigation of the Phase Equilibria of Al-Zn-Ti System in Al-Rich Corner at 400 °C

2011 ◽  
Vol 399-401 ◽  
pp. 2210-2214 ◽  
Author(s):  
Qun Luo ◽  
Feng Jin ◽  
Yang Li ◽  
Qian Li ◽  
Jie Yu Zhang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Experimental Investigation ◽  
Ternary System ◽  
Phase Equilibria ◽  
Ternary Phase ◽  
X Ray ◽  
Xrd Patterns ◽  
New Phase ◽  
Scanning Electron

The phase equilibria in Al-rich corner of the Al-Zn-Ti ternary system at 400 °C were determined by means of optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-ray spectrometer (EDS) and X-ray powder diffraction (XRD). The results showed that this section consisted of three ternary-phase regions, namely, L+(Al)+τ, Ti2Al5+τ+(Al) and Ti2Al5+TiAl3+(Al). The XRD patterns and EDS confirmed that a Ti2Al5-structured phase with containing 4 at.% Zn was stable at 400 °C. Furthermore, the ternary new phase (τ phase) was identified in samples and in equilibrium with (Al), Ti2Al5 and liquid, respectively.

Phase Equilibria in the BaO-SiO2-Al2O3 Ternary System at 1500 °C

2016 ◽  
Vol 697 ◽  
pp. 565-571 ◽  
Author(s):  
Rui Zhang ◽  
Pekka Taskinen
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Ternary System ◽  
Phase Equilibria ◽  
Ternary Compound ◽  
Energy Dispersive Analysis ◽  
Liquidus Composition ◽  
Isothermal Sections ◽  
X Ray ◽  
Scanning Electron

Phase equilibria of the BaO-SiO2-Al2O3 ternary system was experimentally investigated using a quenching technique and analyzed by Scanning Electron Microscopy (SEM) equipped with Energy Dispersive Analysis (EDS) and X-ray Powder Diffraction (XRD). A ternary compound was confirmed in the present work. The liquidus composition in equilibrium with the ternary compound at 1500 °C were quantified. The isothermal sections of the BaO-SiO2-Al2O3 ternary system at 1400 °C, 1500 °C, 1600 °C, and 1700 °C were calculated. Based on the data acquired, the isothermal section at 1500 °C was constructed.

Study on Microstructure of NiCrMoY Alloy Coatings

2014 ◽  
Vol 577 ◽  
pp. 62-65
Author(s):  
Chun Lian Hu ◽  
Shang Lin Hou
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Rare Earth ◽  
High Frequency ◽  
Flame Spray ◽  
X Ray Diffraction ◽  
X Ray ◽  
New Phase ◽  
Scanning Electron ◽  
High Frequency Induction

The microstructure of rare earth NiCrMoY alloy manufactured by atomization and oxygen-acetylene flame spray and high frequency induction remelting technique is investigated by a combination of scanning electron microscopy (SEM), energy spectrum, X-ray diffraction meter (XRD). The results indicate that Microstructure of NiCrMoY alloy coatings are finer and bulk-and needle-like hard Metallograph are precipitated, a new phase MoB is produced.

Research on the High-Temperature Compatibility between SiCf and Mo Substrate

2011 ◽  
Vol 393-395 ◽  
pp. 269-273
Author(s):  
Hang Zhou ◽  
Yun Peng Zhang ◽  
Shu Ai Pang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
High Temperature ◽  
Sintered Body ◽  
Synergy Effect ◽  
Chemical Compatibility ◽  
X Ray Diffraction ◽  
X Ray ◽  
New Phase ◽  
Scanning Electron

For preparing Mo-based composite materials enhanced by SiCf by powder metallurgy, the high temperature of chemical compatibility between SiCf and Mo was analyzed by experimental method in order to find whether the reinforcement can effectively composite with matrix for playing synergy effect. The mixture of SiCf and Mo powder was pressed and then sintered. Using scanning electron microscopy (SEM), the fracture surface of the sintered body was observed. Using X-ray diffraction (XRD), the generation of new phase in the sintered body was analyzed. The sinter's density and hardness was tested also. The results are as follows. After 1750°C sintered, SiCf in the presence of metal Mo had decomposed and disappeared. Decomposed products which were C and Si had reacted with Mo to produce mainly compounds Mo5Si3, MoC and a small amount of MoSi2. The disappearance of the SiCf leave more holes in the substrate. Both density and hardness of the sinter are decreased.

scholarly journals Study on the Phase Equilibria of the Fe-Al-Ni-O System at 750°C

Scanning ◽  
2022 ◽  
Vol 2022 ◽  
pp. 1-12
Author(s):  
Meng Du ◽  
Haifeng Mei ◽  
Ya Liu
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Phase Equilibrium ◽  
Oxide Film ◽  
Phase Equilibria ◽  
Phase Boundary ◽  
Alloy Composition ◽  
X Ray ◽  
Three Phase ◽  
Scanning Electron

Phase equilibria of the Fe-Al-Ni-O system at 750°C were determined by scanning electron microscopy coupled with energy-dispersive X-ray spectrometer and X-ray power diffraction. 54 alloys were prepared with weighted metal and Ni2O3 powder and were annealed at 750°C for 45 days. Two four-phase equilibrium regions and three three-phase equilibrium regions were confirmed, and the boundary between spinel and corundum was obtained. Comparing with the Fe-Al-Ni-O oxidation diagram at 750°C calculated with FSstel and FToxid databases, the phase boundary of the spinel and corundum oxides from experiments was inclined to the Ni-Al side. The determined relationship between primary oxides and alloy composition in this work can be used as a reference for the preparation of the oxide film by selective oxidation.

scholarly journals Investigation on the Particle Growth of Rutile TiO2 Suppressed by Manganese

2018 ◽  
Vol 221 ◽  
pp. 01005
Author(s):  
Aripin ◽  
Edvin Priatna ◽  
Nundang Busaeri ◽  
Rudi Priyadi ◽  
I Nyoman Sudiana ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Experimental Data ◽  
Scanning Electron Microscopy ◽  
Particle Growth ◽  
Crystallite Growth ◽  
X Ray Diffraction ◽  
Rutile Tio2 ◽  
X Ray ◽  
Xrd Patterns ◽  
Scanning Electron

In this paper, we present the results of an investigation on the crystallite growth of rutile TiO2 and the formation of Mn–O–Ti bonds in a TiO2/manganese composition. The effects of manganese loading from 20 wt% to 80 wt%, into TiO2 at a temperature of 1200°C on the structural properties, have been studied. The material’sproperties have been characterized on the basis of the experimental data obtained using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and Scanning Electron Microscopy (SEM). It has been found that an increase of the loading by manganese up to 80 wt% leads to a decrease of the rutile crystallites size and an increase of the amount of Mn–O–Ti bonds. The analysis based on the interpretation of both XRD patterns and FTIR spectrum allows one to explain the reduction of the crystallite size of rutile TiO2 by an increase of the manganese loading.

Hydrothermal Synthesis and Property of Rare Earth of Fluoride NaYF4:Er3+ Materials

2011 ◽  
Vol 399-401 ◽  
pp. 569-572
Author(s):  
Zao Ming Chen ◽  
Xi Rong Chen ◽  
De Yuan Hu
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Rare Earth ◽  
Hydrothermal Synthesis ◽  
Hexagonal Phase ◽  
High Quality ◽  
Sem Images ◽  
X Ray ◽  
Xrd Patterns ◽  
Scanning Electron

High quality NaYF4and NaYF4:Er3+materials were prepared using EDTA-assisted hydrothermal method. The effects of doping of Er3+on the shape of samples were discussed. The samples were characterized by X-ray powder diffraction (XRD), and scanning electron microscopy (SEM). XRD patterns show that the samples are hexagonal phase of NaYF4and NaYF4:Er3+with good crystallization. SEM images present that the samples of NaYF4are homogeneous nanorods with a diameter of 342 nm and a length of 1043nm，the NaYF4:Er3+(5%) sample with a diameter of180.7nm and a length of 1220nm, and NaYF4:Er3+(10%) with a diameter of 139.4nm and a length of 939.9nm.The sizes of the NaYF4and NaYF4:Er3+nanoparticles are basically consistent with that calculated from XRD peak via the Scherrer equation.

Chlorhexidine Adsorption in Hydroxyapatite and Alginate Microspheres by Extrusion in Zinc and Calcium Chloride

2016 ◽  
Vol 720 ◽  
pp. 25-30 ◽  
Author(s):  
Nadia Mohammed Elmassalami Ayad ◽  
Daniel Navarro da Rocha ◽  
Andrea Machado Costa ◽  
Marcelo Henrique Prado da Silva
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Calcium Chloride ◽  
Crystalline Phase ◽  
X Ray ◽  
Zn Concentration ◽  
Vis Spectroscopy ◽  
Before And After ◽  
Xrd Patterns ◽  
Scanning Electron

In this work, the adsorption of a low-concentration solution of chlorhexidine (CHX), an antimicrobial drug, in hydroxyapatite (HA) and alginate microspheres was studied. The microspheres were formed by extrusion of a 1:10 mixture of alginate and HA in two different divalent solutions: CaCl2 and ZnCl2. UV-Vis spectroscopy showed that the microspheres adsorbed approximately half of the chlorhexidine in solution, which was initially at 0.2%. XRD patterns obtained prior adsorption confirmed the presence of HA as the only crystalline phase. Scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDX) analysis were performed before and after CHX adsorption. The spheres produced in CaCl2 solution did not show significant change after adsorption. However, samples obtained in ZnCl2 solution showed a different microstructure, with the presence of crystals with a high Zn concentration. X-Ray Fluorescence (XRF) confirmed the presence of ZnO in the samples after CHX absorption.

An Experimental Investigation of the U-Mo-C Ternary Diagram

2012 ◽  
Vol 194 ◽  
pp. 26-30 ◽  
Author(s):  
Matthieu Peniel ◽  
Houda El Bekkachi ◽  
Olivier Tougait ◽  
Mathieu Pasturel ◽  
Henri Noël
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Scanning Electron Microscopy ◽  
Experimental Investigation ◽  
Ternary Diagram ◽  
X Ray Diffraction ◽  
Isothermal Sections ◽  
X Ray ◽  
Peritectic Decomposition ◽  
Scanning Electron

The isothermal sections of the U-Mo-C ternary system have been established at 1000°C and 1400°C, using powder X-ray diffraction, scanning electron microscopy coupled with energy dispersive X-ray analysis for the quantification of U and Mo and differential thermal analysis. The main differences between the two sections are the appearance of liquid phase at about 1230°C, due to the peritectic decomposition of γ-UMo, and the peritectoid decompositions of MoC and β’’ Mo2C. No other transformation was detected in this temperature range, especially one involving the two only ternary phases found, UMoC2 and U2Mo2C3.

Phase Equilibria Studies of Hf44.5Ti5Cu27Ni13.5Al10 and Hf44.5Nb5Cu27Ni13.5Al10

2005 ◽  
Vol 903 ◽  
Author(s):  
Robert Woodman ◽  
Laszlo Kecskes
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Scanning Electron Microscopy ◽  
Phase Equilibria ◽  
Equilibrium Phase ◽  
Melting Behavior ◽  
Phase Assemblage ◽  
X Ray ◽  
Glass Forming ◽  
Scanning Electron

AbstractWe report the equilibrium phase assemblage of two bulk-metallic-glass-forming alloys, Hf44.5Ti5Cu27Ni13.5Al10 and Hf44.5Nb5Cu27Ni13.5Al10. Using thermal analysis, scanning electron microscopy, and x-ray microanalysis, we examined the phase equilibria of the major components - Hf, Cu, and Ni. We then examined the effect of additions or substitutions of Nb, Ti, and Al on equilibrium phase assemblage and melting behavior.

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