The Mineral Composition and Microstructure of MAC Cementing Material Prepared Using Hydrated Lime

2013 ◽  
Vol 575-576 ◽  
pp. 527-530
Author(s):  
Yong Jie Liu ◽  
Lin Chen ◽  
Shi Quan Liu ◽  
Rui Xia Shi
Keyword(s):  
Ternary Phase ◽  
Ternary Phase Diagram ◽  
Raw Materials ◽  
Hydrated Lime ◽  
X Ray Diffraction ◽  
Eds Analysis ◽  
Mineral Phases ◽  
Diffraction Peaks ◽  
Cementing Material

MAC cementing material was in-situ synthesized with different ratios of raw materials and sintering temperatures. The raw materials include hydrated lime, magnesite and alumina. X-ray diffraction analysis indicates that the major mineral phases in the MAC are monocalcium aluminate (CA), magnesium aluminate spinel (MA) and calcium aluminate (C7A12). The relative contents of the mineral and amorphous phase were simply calculated based on the relative diffraction peaks and MgO-Al2O3-CaO ternary phase diagram. SEM and EDS analysis indicate that the MAC cementing material includes layered structured CA, long strip C7A12 and octahedral MA.

scholarly journals Supplementary X-ray studies of the Ni-Sn-Bi system

2007 ◽  
Vol 43 (2) ◽  
pp. 141-150 ◽  
Author(s):  
G.P. Vassilev ◽  
K.I. Lilova ◽  
J.C. Gachon
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Phase Equilibria ◽  
Ternary Compound ◽  
Approximate Formula ◽  
Ternary Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Peaks ◽  
Scanning Electron

Phase equilibria were studied in the system Ni-Sn-Bi. Special attention has been paid to the identification of the recently found ternary phase. For this purpose samples were synthesized using intimately mixed powders. After annealing and quenching, all alloys were analyzed by scanning electron microscope and by X-ray diffraction. The results give evidences about the existence of a ternary compound with approximate formula Ni6Sn2Bi to Ni7Sn2Bi. Overlapping of some neighboring diffraction peaks of this phase with NiBi and Ni3Sn_LT is the reason for the difficulties related to the X-ray diffraction identification of the ternary phase.

600°C Isothermal Section of the Zn-Fe-Nb Ternary System at the Zn-Rich Corner

2011 ◽  
Vol 391-392 ◽  
pp. 1210-1214
Author(s):  
Hao Tu ◽  
Xin Ming Wang ◽  
Ya Liu ◽  
Chang Jun Wu ◽  
Jian Hua Wang ◽  
...  
Keyword(s):  
Isothermal Section ◽  
Ternary System ◽  
Diffusion Couple ◽  
Ternary Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Eds Analysis ◽  
Δ Phase

The isothermal section of the Fe-Zn-Nb ternary system at 600 oC was determined using the equilibrated alloys with the aid of diffusion couple approach. The specimens were investigated by means of SEM-EDS analysis, SEM-WDS analysis and X-ray diffraction. A true ternary phase T was identified, this phase is in equilibrium with ε, NbZn3, Γ, δ, and η - Zn phases respectively in the system. The solubility of Nb in η - Zn and δ phase is limited and that of Zn in ε is up to 10.0%.

In Situ X-Ray Diffraction of an Arc Weld Showing the Phase Transformations of Ti and Fe as a Function of Position in the Weld Performed at a Synchrotron

1993 ◽  
Vol 37 ◽  
pp. 479-482 ◽  
Author(s):  
Joe Wong ◽  
J. W. Elmer ◽  
P. A. Waide ◽  
E. M. Larson
Keyword(s):  
Combustion Synthesis ◽  
Ferroelectric Material ◽  
Bragg Diffraction ◽  
Intermediate Species ◽  
X Ray Diffraction ◽  
Synchrotron Source ◽  
X Ray ◽  
Subsequent Phase ◽  
Diffraction Peaks

The synchrotron x-ray source provides a unique opportunity to observe many “in-situ” processes. The formation of the “short-lived” intermediate species, Ta2C, during the combustion synthesis of TaC, has been observed and reported by monitoring the Bragg diffraction peaks of the reactants and products, Similarly, the synthesis of the ferroelectric material, BaTiO3, and subsequent phase transfonnation from cubic to tetragonal have also been investigated. These experiments would not have been possible without the high incident x-ray flux available at a synchrotron source.

scholarly journals Phase Transition and Ordering Temperatures of TiAl-Mo Alloys Investigated by In Situ Diffraction Experiments

2010 ◽  
Vol 654-656 ◽  
pp. 456-459 ◽  
Author(s):  
Thomas Schmoelzer ◽  
Svea Mayer ◽  
Frank Haupt ◽  
Gerald A. Zickler ◽  
Christian Sailer ◽  
...  
Keyword(s):  
Ternary Phase ◽  
Elevated Temperatures ◽  
Volume Fraction ◽  
Ternary Phase Diagram ◽  
High Energy ◽  
The Body ◽  
Alloying Element ◽  
Tial Alloys ◽  
Β Phase

Intermetallic TiAl alloys with a significant volume fraction of the body-centered cubic β-phase at elevated temperatures have proven to exhibit good processing characteristics during hot-working. Being a strong β stabilizer, Mo has gained importance as an alloying element for so-called β/γ-TiAl alloys. Unfortunately, the effect of Mo on the appearing phases and their temperature dependence is not well known. In this work, two sections of the Ti-Al-Mo ternary phase diagram derived from experimental data are shown. These diagrams are compared with the results of in-situ high-temperature diffraction experiments using high-energy synchrotron radiation.

scholarly journals Chemical and mineralogical characterization of portuguese ceramic tiles in the historic center of São Luís do Maranhão (Brazil): an approximation of the mineralogy and firing temperature of the raw materials

2013 ◽  
Vol 66 (1) ◽  
pp. 91-98 ◽  
Author(s):  
José Manuel Rivas Mercury ◽  
Domingos de Jesus Costa Pereira ◽  
Nazaré do Socorro Lemos Silva Vasconcelos ◽  
Aluísio Alves Cabral Jr. ◽  
Romulo Simões Angélica
Keyword(s):  
Firing Temperature ◽  
Raw Materials ◽  
X Ray Diffraction ◽  
Ceramic Tiles ◽  
Mineralogical Characterization ◽  
Calcium Carbonates ◽  
Historic Center ◽  
Mineral Phases ◽  
Materials Used

This work involved the first-ever characterization of antique Portuguese ceramic wall tiles in the Historic Center of São Luis do Maranhão, Brazil. The tiles were characterized by optical microscopy, X-ray diffraction (XRD) and chemical analysis to identify the possible raw materials used in the fabrication process, as well as the firing temperature of these materials. The results indicate that the microstructure of these materials consists of pores of varying sizes with calcite incrustations and quartz grain sizes smaller than 500 µm distributed in a pinkish yellow matrix, which were identified by XRD as calcite, gehlenite, wollastonite, quartz, and amorphous mineral phases. Based on this information, it can be inferred that the original raw materials probably consisted of a mixture of kaolinitic clays (Al2O3·2SiO2·2H2O) rich in calcium carbonates and quartz, or mixtures of kaolinitic clays, quartz and calcite, which did not reach the pre-firing temperature of 950ºC.

Different CaO Content Influence on Fusibility of Coal Ash

2011 ◽  
Vol 396-398 ◽  
pp. 1278-1282
Author(s):  
Yong Jing Liu ◽  
Yan Hong Guo ◽  
Qiao Wang
Keyword(s):  
Phase Diagram ◽  
Chemical Composition ◽  
Ternary Phase ◽  
Ternary Phase Diagram ◽  
Coal Ash ◽  
X Ray Diffraction ◽  
X Ray

Selecting the Zichang coal as the sample coal, the chemical composition of the ash is analyzed with X-ray diffraction. The fusibility of coal ash temperature is measured for the ash with the different CaO content. The results shows that fusibility of coal ash drops with the increasing CaO content until it reaches 3.0%; then it increases with the increasing CaO content. We can explain this behavior by SiO2–Al2O3–CaO ternary phase diagram. The temperature of fusibility is lower when the additive amount reaches 3.0%~3.5% of coal.

Synthesis and Characterization of PMMA/MMT Nanocomposites

2012 ◽  
Vol 182-183 ◽  
pp. 249-253
Author(s):  
Jun Qiao ◽  
Jia Wei Shen ◽  
Xiang Hong Huang ◽  
Qian Feng Zhang
Keyword(s):  
Methyl Methacrylate ◽  
Fourier Transformation ◽  
Raw Materials ◽  
Polymerization Process ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fourier Transformation Infrared Spectroscopy ◽  
Thermal Stability Of

PMMA/MMT nanocomposites has been prepared by using methyl methacrylate (MMA), montmorillonite (MMT) and ethanolamine as the raw materials via an in-situ free radical polymerization process. The as-prepared nanocomposites were characterized by Fourier transformation infrared spectroscopy (FTIR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The results show that the poly(methyl methacrylate) and inorganic montmorillonite have been effectively combined. The structure and thermal stability of the as-prepared nanocomposites are different from the content of MMT in the nanacomposites.

scholarly journals Improvement in Slag Resistance of No-Cement Refractory Castables by Matrix Design

Ceramics ◽  
2020 ◽  
Vol 3 (1) ◽  
pp. 31-39 ◽  
Author(s):  
Hong Peng ◽  
Jun Liu ◽  
Qinghu Wang ◽  
Yawei Li
Keyword(s):  
Corrosion Resistance ◽  
Strong Impact ◽  
Slag Resistance ◽  
X Ray Diffraction ◽  
Mineral Phases ◽  
Refractory Castables ◽  
Thermodynamic Simulations ◽  
Corrosion Mechanisms ◽  
Matrix Design

The corrosion resistance of spinel containing cement bonded castables has been extensively investigated in the past. However, corrosion of no-cement refractory castables (NCC) has not been widely studied since the use of NCC has been relatively limited up till now. This paper focuses on the slag resistance of NCCs, and the often-used spinel containing low cement castable (LCC) is used as the reference. Three different NCC binders were designed: (i) Al2O3 + MgO (alumina bond), in situ spinel formation; (ii) Al2O3 + SiO2 (microsilica-gel bond), mullite formation; and (iii) Al2O3 + MgO + SiO2 (MgO-SiO2 bond). Slag resistance tests were conducted using the static crucible method with ladle slag. The corrosion mechanisms were studied by means of Scanning Electron Microscopy (SEM/EDS), X-ray Diffraction (XRD), and thermodynamic simulations. The results confirmed that the mineral phases, microstructure, and liquid formation at a high temperature of the refractory materials had a strong impact on the corrosion resistance. The slag resistance was significantly improved when the cement was replaced by the cement-free binders.

An investigation into the structure and morphology of polyamide 6/polyaniline hybrid fibers

2018 ◽  
Vol 38 (1) ◽  
pp. 19-24
Author(s):  
Kamran Zarrini ◽  
Mostafa Youssefi
Keyword(s):  
Phase Diagram ◽  
Ternary Phase ◽  
Ternary Phase Diagram ◽  
Polyamide 6 ◽  
Wet Spinning ◽  
X Ray Diffraction ◽  
Hybrid Fibers ◽  
X Ray ◽  
Structure And Morphology ◽  
Crystalline Forms

Abstract A wet spinning dope composition for the production of hybrid fibers was selected based on the analysis of a ternary phase diagram of polyamide 6 (PA6)/formic acid/water. Polyaniline was later added to this dope with different weight percentages to produce hybrid fibers. The results showed that polyaniline was dispersed uniformly in the PA6 matrix and the spinning dope composition had a great impact on the morphology of the hybrid fibers produced with different quantities of polyaniline. The electrical conductivity of the hybrid fibers was increased with the increase in polyaniline content of the fibers and reached 7.94×10−3 S·cm−1 for the sample that contained 30% polyaniline. The crystalline structure of PA6 in all hybrid fibers was revealed to be only of α form. No other crystalline forms, for example β form, was observed in PA6 due to the presence of polyaniline in the system as revealed from x-ray diffraction results.

Grain Size and Adhesion Strength of the V8C7 Coatings Produced In Situ

2017 ◽  
Vol 898 ◽  
pp. 1381-1387
Author(s):  
Xin Wang ◽  
Li Sheng Zhong ◽  
Xi Zhang ◽  
Yun Hua Xu ◽  
Hong Wu ◽  
...  
Keyword(s):  
Adhesion Strength ◽  
Vanadium Carbide ◽  
Gray Cast Iron ◽  
Raw Materials ◽  
Average Diameter ◽  
Scratch Test ◽  
X Ray Diffraction ◽  
X Ray ◽  
Excellent Adhesion

The vanadium carbide (V8C7) coating was fabricated by in situ reaction which used gray cast iron and vanadium plate as raw materials providing carbon and vanadium sources, respectively. The microstructure, phases, and adhesion strength of V8C7 coating were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD) and a single scratch test. The XRD results showed that the coating consisted of V8C7 and α-Fe, with the peaks of (222), (400), (440), (622) and (444) of V8C7 phase were confirmed. Moreover, the average diameter (D) of the V8C7 particles in the range of 432~582nm was calculated on the basis of the Scherrer and Halder-Wagner equations. The critical load of interface between V8C7 and substrate was 98.3 N, which implied that the interface of V8C7 coating /substrate had excellent adhesion strength.

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