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  • Modelling of high-chromia refractory spalling in

    2008-12-1 · One of the most severe refractory degradation mechanisms is spalling, which can occur by either volume-expansion phenomena (compressive stresses) or by volume-shrinkage phenomena (tensile stresses). A volume-shrinkage model is benchmarked to high-chromia refractory material properties and performance under gasifier operating conditions.

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  • Recent advances in silica-alumina refractory: A review ...

    2014-6-1 · The strength of a refractory material is an indication of its suitability for use in construction. It is a combined measure for the strength of the grains and also of the bonding system. As the major properties of the refractory materials are intimately connected to their mineralogical composition, the samples should finely crush and analyzed by X-ray diffraction.

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  • Raw materials: alumina for refractories. XIETA®

    Xieta International, S.L., produces a range of specific aluminas with a great purity characteristic and with a high controlled micro-structure which allows a very small particle size. Such characteristic made these aluminas suitable to apply at refractory products manufacturing, both for …

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  • Analysis and Prediction of Corrosion of Refractory ...

    2018-12-18 · Corrosion Reaction of K 2 SO 4 and the Five Components of Refractory Materials. It can be seen from Figure 2 that the tendency of Gibbs free energy change of the five components of refractory materials reacted with K 2 SO 4 in the range of 600 to 1200 °C is consistent with the one of reactions between the five components of refractory materials and K 2 CO 3.

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  • Damage Detection of Refractory Based on Principle ...

    2019-7-30 · components. Figure shows the microstructure of such a refractory without damage. e magnesia aggregates are formedbysinteringofcrystalliteswithweakinterfaces.e sizeofmagnesiagrainsvariesfromlessthanonehalfmil-limeterstovemillimeters.e othergrainsimpurities,such asSiOandAlO,withlessthan mmsizes,arefounded scatteredinthematrix,thecarbonbinder.

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  • Size effect predictions by fracture models for a ...

    2019-5-10 · Abstract. Refractory ceramics used as kiln furniture are designed to operate at elevated temperatures with a high thermal shock resistance. In practice, however, the material fails due to thermal fatigue after a limited number of cycles.

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  • The influence of flow asymmetry on refractory erosion

    2019-9-1 · The slag formed in function of the oxygen blow through a lance in a VC, like in RH-TOP process , is certainly unsaturated in respect of the main constituents of the refractory bricks, and extremely fluid, which should favor dissolution of some components of the refractory in the slag. Considering that this process at high temperatures (without kinetic restriction regarding the chemical …

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  • Wire drawing failures and tungsten fracture

    2006-7-1 · Because fracture statistics in the wire production departments are seldom correlated with the corresponding fracture phenomena and their specific fracture appearance, the aim of the present paper is to give an overview concerning some selected and typical examples of wire drawing failures and the corresponding occurrence of fracture phenomena to get a better understanding of the complexity of …

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  • Experimental and numerical study of the

    2007-1-1 · Micrographs of an industrial refractory and of a simplified model material: (a) industrial refractory and (b) simplified model material. The glass frit is mixed with additives (water, methocel, peg300, acetic acid) which improve the plasticity and lubrication of the mixture. 4 The good content of alumina balls is then added to this mixture.

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  • Development and exploration of refractory high

    2018-10-1 · Such alloys, including HEAs, are referred to as refractory complex concentrated alloys (RCCAs) or refractory multiprincipal element alloys. RCCAs have a BCC crystal structure and may also contain IM phases, mainly B2 and/or Laves. The reported densities of RCCAs are …

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  • Raw materials: alumina for refractories. XIETA®

    Such characteristic made these aluminas suitable to apply at refractory products manufacturing, both for shaped refractories and monolithic ones. The Alumina XT-701, has been specially developed to be used at all refractories aplications (shaped and monolithic ones) which requiring to use XIETA ® -TABULAR.

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  • Damage Detection of Refractory Based on Principle ...

    2019-7-30 · Compute the features and its characteristic vec-tor. Set 1, 2,..., to be eigenvalues of . Meanwhile, ... Figure shows the microstructure of such a refractory without damage. e magnesia aggregates are ... AE is dened as phenomena whereby transient elastic

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  • Combustion joining of refractory materials:

    Simultaneously, carbon from the composite material is dissolved into the liquid-metal layer, leading to the formation of a refractory phase (TiC) with a much higher viscosity than the metal. Because the characteristic squeezing rate is much higher than the characteristic diffusion time, the thickness of the final joining layer is essentially ...

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  • Development and exploration of refractory high

    2018-10-1 · Open literature publications, in the period from 2010 to the end of January 2018, on refractory high entropy alloys (RHEAs) and refractory complex concentrated alloys (RCCAs) are reviewed. While RHEAs, by original definition, are alloys consisting of five or more principal elements with the concentration of each of these elements between 5 and 35 at.%, RCCAs can contain three or more …

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  • Refractory disease | Article about Refractory disease

    disease, impairment of the normal state or functioning of the body as a whole or of any of its parts. Some diseases are acute, producing severe symptoms that terminate after a short time, e.g., pneumonia; others are chronic disorders, e.g., arthritis, that last a long time; and still others return periodically and are termed recurrent, e.g., malaria.

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  • New Experimental Method for Consolidation some

    2021-5-28 · deformation characteristic for very high pressure and to obtain compacts of refractory and graphitc based powders near theoretical density with improved physical-mechanical properties. REFERENCES 1. Jim D. Mote and Joan J. Fitzpatric. Proceedings of the conference on Emergent Process Method for High - Technology Ceramics, 1982, p. 695-71 0.

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  • 10.1016/j.jmatprotec.2004.04.365 | DeepDyve

    1 Introduction There is a trend to increase the use of unshaped refractory castables in various industries like steel-making, cement production, energy production and waste incineration. In several applications, they are more economical and easier to use than shaped refractories and they can exhibit excellent mechanical properties.

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  • Analysis and Prediction of Corrosion of Refractory ...

    2018-12-18 · This also shows that the reaction tendency of the corrosion reaction is the only one that can be obtained by calculating the Gibbs free energy. The estimation of difficulty of the corrosion reaction needs to be obtained by considering the products of Table 1 , Table 2 and Table 3 regarding the corrosion of the refractory component by the ...

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  • Size effect predictions by fracture models for a ...

    2017-4-6 · Here, we would like to discuss about the stability of the oxides calculated by thermodynamics. Fig. 6(a) shows the Ellingham diagram for NiO, MoO2 and WO2 [7]. MoO2 and WO2 are more advantageous in energy than MoO3 and WO3 when they are on their metal surfaces in a vacuum as shown in Fig. 6(b) and (c).

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  • New Experimental Method for Consolidation some

    2021-5-28 · deformation characteristic for very high pressure and to obtain compacts of refractory and graphitc based powders near theoretical density with improved physical-mechanical properties. REFERENCES 1. Jim D. Mote and Joan J. Fitzpatric. Proceedings of the conference on Emergent Process Method for High - Technology Ceramics, 1982, p. 695-71 0.

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  • (PDF) Int. Journal of Refractory Metals and Hard

    Provided for non-commercial research and education use. Not for reproduction, distribution or commercial use. ELSEVIER Volume 28, issue 5, September 2010 ISSN 02E3-43S8 International Journal of REFRACTORY METALS & HARD MATERIALS Editor-in-Chief Hugo M. Ortner This article appeared in a journal published by Elsevier.

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  • Allstates Refractory Contractors, LLC - Waterville -

    Robert Shultz started Allstates Refractory Services in 1995 working primarily in the metals heat treatment industry. In 2002, I purchased the company renaming it Allstates Refractory Contractors. We are a dedicated group of engineers and skilled tradesmen working in some of the toughest situations in the industries we serve.

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  • Development and exploration of refractory high

    2018-6-8 · II. TAXONOMY AND STATISTICAL ANALYSIS. The first two RCCAs, MoNbTaW and MoNbTaVW, were reported in 2010 by Senkov et al. Reference Senkov, Wilks, Miracle, Chuang and Liaw 6 and in the following years, the number of newly reported RCCAs has increased steadily [].By the end of January 2018, 151 new compositions were described in the open literature, among which 25 are 4 …

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  • Optimization of Properties for Alumina-Spinel

    2021-6-1 · Aiming at optimizing properties of alumina-spinel refractory castables, coarse corundum particles were replaced partially with the particles of a novel porous multi-component CMA (CaO-MgO-Al 2 O 3) aggregate in the same size.Properties including the bulk density, apparent porosity, strength, slag corrosion resistance, thermal shock resistance and thermal fatigue resistance of alumina-spinel ...

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  • Refractory period in network models of excitable

    2017-8-2 · The model consists of N excitable nodes on a random directed graph where every two nodes are connected with probability q.The average out-degree and in-degree of the network is equal to 〈k〉 …

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  • Refractory disease | Article about Refractory disease

    disease, impairment of the normal state or functioning of the body as a whole or of any of its parts. Some diseases are acute, producing severe symptoms that terminate after a short time, e.g., pneumonia; others are chronic disorders, e.g., arthritis, that last a long time; and still others return periodically and are termed recurrent, e.g., malaria.

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  • Fabrication of stable superhydrophobic bismuth

    2021-4-26 · The bismuth superhydrophobic surface (BiSHS) was fabricated on aluminum (Al) substrate by immersion in BiCl3 aqueous solution following annealing treatment. The surface morphology of the sample shows cauliflower and landmass like structures by scanning electron microscope. The size of NPs in the microscaled landmass texture is from 200 to 500 nm. The BiSHS contains the Bi/Bi2O3 layer on …

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  • Casting Procedures & Casting Defects in Dentistry

    2017-4-6 · Here, we would like to discuss about the stability of the oxides calculated by thermodynamics. Fig. 6(a) shows the Ellingham diagram for NiO, MoO2 and WO2 [7]. MoO2 and WO2 are more advantageous in energy than MoO3 and WO3 when they are on their metal surfaces in a vacuum as shown in Fig. 6(b) and (c).

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  • OPERATIONS STRATEGIES FOR VERTICAL SHAFT LIME

    2012-3-12 · chemical products like lime, the vertical shaft kilns offers a good investment options. This is because of the ... This kiln can be described as an upright heavy steel cylinder lined with refractory material. ... Figure 1 shows a schematic diagram of a shaft kiln. The challenge of operating a shaft kiln to

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  • Damage Detection of Refractory Based on Principle ...

    The industrial refractory tested in the study is composed of magnesia aggregates, carbon binder (phenolic resin and/or pitch), and other components. Figure 1 shows the microstructure of such a refractory without damage. The magnesia aggregates are formed by sintering of crystallites with weak interfaces.

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  • Optimization of Properties for Alumina-Spinel

    2021-6-1 · 1. Introduction. Alumina-magnesia and alumina-spinel castables have been widely used in steel ladle linings below the slag zone, the well block of purging plugs, and injection lances due to their excellent slag resistance and mechanical properties [1,2].In view of the increasing ratio of scrap to steel, higher working temperature, and prolonged refining time, the enhanced properties of ...

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  • US4306030A - Carbon-containing refractory - Google

    The invention relates to precluding the shortcomings intrinsic to the conventional unburned carbon-containing refractory bricks, i.e., oxidization under high temperature conditions and the incidental decarbonization, the phenomenon of exfoliation and detachment of the fragile layers, and more particularly to obtaining thereby unburned carbon-containing refractory bricks having the high ...

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  • Wetting and corrosion studies on SS304 material

    2021-2-5 · Literature survey shows that the Hydrophobic surfaces has better corrosion resistance characteristic. Here In this work, Hydrophobic surface will be fabricated on SS304 in the shape of micropatterns. Micro patterns like grooves and are made on the surface of SS304 material with the wire electric discharging machining process with varying ...

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  • Structural and optical characterization of Cr2O3 ...

    2017-8-2 · Networks of excitable nodes have recently attracted much attention particularly in regards to neuronal dynamics, where criticality has been argued to be a fundamental property. Refractory …

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  • Refractory period in network models of excitable

    2021-3-12 · Tuyere is one of the critical components of blast furnace. The function of tuyere is to supply hot air and fuels like pulverized coal inside the furnace. In doing so, tuyeres get exposed to severe thermal conditions, hot metal contact and abrasive environment. Tuyere failure contributes to major part of mechanical breakdown in the furnace leading to immense production loss. This work focuses ...

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  • A Journey Towards Improving Tuyere Life | SpringerLink

    Failure analysis is an investigative engineering approach to determine how and why equipment or a component has failed, and the objective is to prevent future failures [].Case histories of premature failure have recently been described in the literature [2,3,4].This work resulted from a premature failure in a combustor few months after an industrial unit started up in an alumina factory.

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  • Investigation of Premature Failure of an Industrial ...

    2021-4-26 · The bismuth superhydrophobic surface (BiSHS) was fabricated on aluminum (Al) substrate by immersion in BiCl3 aqueous solution following annealing treatment. The surface morphology of the sample shows cauliflower and landmass like structures by scanning electron microscope. The size of NPs in the microscaled landmass texture is from 200 to 500 nm. The BiSHS contains the Bi/Bi2O3 layer on …

    Get Price
  • Damping measurements via Impulse Excitation Technique

    2019-11-26 · material. Damping behavior may originate from multiple microstructural phenomena like grain boundary sliding, liquid phase formation, phase transition, diffusion, precipitation, crack propagation [1] and frictional processes at crack interfaces. Due to high sensitivity to the grain boundary characteristic…

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  • A unique magnetic material for protective clothes

    2021-2-5 · Literature survey shows that the Hydrophobic surfaces has better corrosion resistance characteristic. Here In this work, Hydrophobic surface will be fabricated on SS304 in the shape of micropatterns. Micro patterns like grooves and are made on the surface of SS304 material with the wire electric discharging machining process with varying ...

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  • Structural and optical characterization of Cr2O3 ...

    2018-1-22 · A novel refractory CoCrMoNbTi0.4 high-entropy alloy (HEA) was prepared via vacuum arc melting. After annealing treatment at different temperatures, the microstructure evolution, phase stability, and mechanical properties of the alloy were investigated. The alloy was composed of two primary body-centered cubic structures (BCC1 and BCC2) and a small amount of (Co, Cr)2Nb-type Laves phase …

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  • Wetting and corrosion studies on SS304 material

    Abrasive and Fretting Wear Resistance of Refractory Cobalt Alloy Specimens Manufactured by the Method of Selective Laser Melting. ... Fretting wear studies on diamond-like carbon coated Ti–6Al–4V. By Ganesh Sundara Raman. INTRODUCTION TO TRIBOLOGY. By Jose Manuel Lopez Mendez. Fretting wear of Ti(C x N y ) PVD coatings under variable ...

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  • Influence of Annealing on Microstructure and

    The self-bonded material was fired at approximately 1454° C. (2650° F.), the kaolin-bonded material was sintered at approximately 1427° C. (2600° F.). The results obtained in this phase of the study are summarized in Table V, which shows a range of fired densities of 2.563-2.805 g/cm 3. The green and fired densities were found to depend ...

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  • (PDF) Abrasive and Fretting Wear Resistance of

    2019-10-4 · In article number 1903239, Junsheng Yu, Wei Huang, Ziyi Ge, Tobin J. Marks, Antonio Facchetti, and co-workers present a spontaneous passivation method to greatly improve the performance of perovskite solar cells (PSCs) by using a zwitterionic small-molecule electrolyte.This bottom-up passivation is a novel and promising strategy to overcome outstanding issues impeding PSC …

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  • Characterization of black carbon‐containing particles

    View Exam 1 Study Guide.docx from PSB 2000 at Florida State University. Exam 1 Study Guide PSB2000 Spring 2019 Use for more detailed studying in addition to studying the material …

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  • Roadmap on metasurfaces - IOPscience

    2019-7-1 · The optical properties of a material are heavily dependent on different growth conditions and crystal properties , which necessitates further optimization for the best plasmonic response. Material research is needed to explore possible refractory materials that would have comparable optical properties to …

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  • Characterization of black carbon‐containing particles

    Abrasive and Fretting Wear Resistance of Refractory Cobalt Alloy Specimens Manufactured by the Method of Selective Laser Melting. ... Fretting wear studies on diamond-like carbon coated Ti–6Al–4V. By Ganesh Sundara Raman. INTRODUCTION TO TRIBOLOGY. By Jose Manuel Lopez Mendez. Fretting wear of Ti(C x N y ) PVD coatings under variable ...

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  • (PDF) Abrasive and Fretting Wear Resistance of

    2020-9-25 · Acute myeloid leukemia (AML) is a fatal hematopoietic malignancy and has a prognosis that varies with its genetic complexity. However, there has been no appropriate integrative analysis on the hierarchy of different AML subtypes. Using Microwell-seq, a high-throughput single-cell mRNA sequencing platform, we analyzed the cellular hierarchy of bone marrow samples from 40 patients and …

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  • Effects of alfapump™ system on kidney and circulatory ...

    C-Mac International, LLC Pittsburgh, PA 412-406-7171. Request For Quote View Company Profile. C-Mac International, LLC is a custom ceramics supplier. We provide advanced ceramic component parts manufacturing for a variety of industries and provide solutions to many ceramic needs. Our company specializes in Alumina, Steatite, Cordierite ...

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  • A single-cell survey of cellular hierarchy in acute ...

    where q″ 12 is the heat flux from side (or material) 1 of the interface to side (or material) 2 of the interface (W/m 2), υ l,1 is the longitudinal speed of sound for material 1 (s), ℏ is Planck's constant (J·s), f 1 (ω,T 1) is the Bose–Einstein distribution for material 1, and D(ω) is the material …

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  • Ceramic Manufacturing Companies | IQS Directory

    2016-11-9 · The turbulent motion of fluids has captured the fancy of observers of nature for most of recorded history. From howling winds to swollen floodwaters, the omnipresence of turbulence paralyzes continents and challenges our quest for authority over the world around us. But it also delights us with its unending variety of artistic forms.

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  • Applications and Impacts of Nanoscale Thermal

    2018-6-7 · First direct air capture paper for which all major components are either drawn from well-established commercial heritage or described in sufficient detail to allow assessment by third parties. Includes energy and materials balances, commercial engineering cost breakdown, and pilot plant data. When CO2 is delivered at 15 MPa, the design requires either 8.81 GJ of natural gas, or 5.25 GJ of gas ...

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