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design of refractory material shows the characteristic phenomena like

  • refractory material shows the characteristic

    refractory material shows the characteristic phenomena like temperature applications Nacre-like ceramic refractories for high temperature ... 2018-4-1 · A nacre-like ceramic containing alumina platelets separated by aluminium borate (9Al 2 O 3 ·2B 2 O 3) as refractory secondary phase was designed to obtain ceramic composites with enhanced ...

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  • Natural-mixing guided design of refractory high

    2020-8-24 · A refractory high-entropy alloy was designed with the composition chosen based on the natural-mixing characteristics among refractory elements; this …

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  • Design, operation and evaluation of an improved

    1. Introduction. Continuous wear of ordinary ceramic refractories as applied in technical pyroprocesses is characterized by a continuous mass loss of refractory material over time and it exerts major impact on the service life of refractory linings of industrial vessels and furnaces in ferrous and non-ferrous metallurgy, the glass industry, waste incineration, and the cement and lime production.

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  • Transient refractory material dissolution by a ...

    2014-12-1 · The aim of the experiment (named LIVECERAM) was to use the same facility and simulant materials, but for the analysis of refractory material dissolution by a melt in which the temperature stays always below the melting temperature of the refractory lining material. The refractory material was pure KNO 3 (melting temperature 336 °C) and the ...

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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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  • Numerical study of the effects of refractory lining ...

    2016-1-1 · These phenomena affect the mass diffusion rate of dioxygen through the refractory layer and induce a macroscopic swelling of the material. The analysis of the numerical results allows for a better understanding of the influence of the lining design and the nature of the ceramics on the lifespan of such refractory …

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  • Damage Pattern Recognition and Feature Extraction

    An adequate handling in refractory material manufacturing is a key to successful production of the refractory eventually leading to successful practice in iron and steel making processes. In this view point, it is quite important to understand damage pattern during manufacturing process which helps an appropriate operation for refractory producers.

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  • Resistivity of Refractory Carbides (ZrC, HfC, and TaC ...

    2021-3-10 · It was established that the enthalpy of the most refractory (Ta 0.8 Hf 0.2 C, 1.8 kJ/g) of the three studied carbides is almost twice as low at the liquidus temperature as that of the two other, less refractory carbides (HfC 0.85 and ZrC 0.95). This fact should be taken into account in the design of thermal protection elements.

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  • Effect of hercynite spinel content on the properties of ...

    2015-9-1 · Hercynite spinel was added to magnesia–calcium zirconate refractory compositions in the range of 0–8 wt%.Refractory specimens were obtained by solid state sintering at 1500 °C in an electric furnace.The effect of different contents of spinel (FeAl 2 O 4) as a microstructural elastifier in the refractory matrix was studied.Refractory specimens were characterized by density, porosity, cold ...

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  • Microstructure and mechanical properties of a novel ...

    Table 2 shows the results of energy spectrum of HfMoScTaZr refractory high entropy alloy. From the EDS results, it can be seen that the atomic fraction of each element in region 1 (grain boundary) and region 2 (grain) in Fig. 4 (a) is almost the same as the actual ratio, and there is …

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  • Crystal Growth & Design | Vol 20, No 8

    Crystal Growth & Design 2020, ... Sonofragmentation of Rectangular Plate-like Crystals: Bivariate Population Balance Modeling and Experimental Validation. Ashok Das*, Stutee Bhoi, Debasis Sarkar, and ; Jitendra Kumar* Crystal Growth & Design 2020, ...

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  • Mathematical Modeling of Flow and Heat Transfer

    2010-6-1 · The careful design of the insulation package can also aid in minimizing thermal nonuniformities. Like the melters, the refractory channels (i.e., the delivery system) may also differ considerably in design and operation, but involve fewer phenomena than the melter and generally have simpler boundary conditions.

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  • Evaluation of the Microstructural Aspects, Mechanical ...

    2019-5-17 · MoTaNbVTi refractory high entropy alloy was synthesized by the vacuum arc melting technique in its equi-atomic composition. The modification of its microstructural features along the vertical cross-section of the sample was associated with undercooling phenomena and the release of heat of fusion. The examined system exhibited high micro and macro-hardness values, while concerning its ...

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  • Design and Construction of an Instrumentation

    2021-4-5 · In recent years, significant efforts were taken at CERN and other high-energy physics laboratories to study and predict the consequences of particle beam impacts on devices such as collimators, targets, and dumps. The quasi-instantaneous beam impact raises complex dynamic phenomena which may be simulated resorting to implicit codes, for what concerns the elastic or …

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  • Journal of Physics D: Applied Physics, Volume 54,

    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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  • Strong, tough and stiff bioinspired ceramics from

    2021-3-4 · The sample shows a large ME coefficient with a value of 176.41 V cm −1 Oe. The sensitivity, linearity and deviation of the sample are 892.96 mV Oe −1, 0.99965 and ±2% for the AC magnetic field, and 157.6 mV Oe −1, 0.99444 and ±5% for the DC magnetic field, respectively, and it shows excellent stability over repetitions. Moreover, the ...

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  • Prof. V. Shalaev, Purdue University, Electrical &

    2014-3-23 · The bioinspired, material-independent design presented here is a specific but relevant example of a strong, tough, and stiff material, in great need for structural, transportation, and energy ...

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  • Grain boundary engineering: historical perspective

    2021-5-11 · 深部生物圈即埋藏在地球深部的黑暗生态系统,一般指海底沉积物1 m以下环境中栖息的生态系统 [1]。不同于利用太阳能进行光合作用维持的地表生物圈,深部微生物可通过化能合成作用将无机物转化为有机质,并作为初级生产者为消费者提供能量和碳源,形成一个“黑暗食物链”。

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  • An Index of Refractory Organics - EPA

    ----- ABSTRACT Refractory waterborne organics resist biodegradation, accumulate in the environment and can inhibit life forms. This research develops laboratory techniques for, and interpretations of, a Refractory Index (R.I.) to assess quantitatively the persistency of refractory organics and uses the R.I. determination to evaluate some 38 industrial, natural and combined or- ganics.

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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 ...

    Get Price
  • Mathematical Modeling of Flow and Heat Transfer

    2010-6-1 · The careful design of the insulation package can also aid in minimizing thermal nonuniformities. Like the melters, the refractory channels (i.e., the delivery system) may also differ considerably in design and operation, but involve fewer phenomena than the melter and generally have simpler boundary conditions.

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

    thermal shock resistance. In practice, however, the material fails due to thermal fatigue after a limited number of cycles. To predict this failure behaviour, it is generally not possible to use linear elastic fracture mechanics due to the fact that the coarse grained, porous material shows a …

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  • Crystal Growth & Design | Vol 20, No 8

    Crystal Growth & Design 2020, ... Sonofragmentation of Rectangular Plate-like Crystals: Bivariate Population Balance Modeling and Experimental Validation. Ashok Das*, Stutee Bhoi, Debasis Sarkar, and ; Jitendra Kumar* Crystal Growth & Design 2020, ...

    Get Price
  • International Journal of Minerals, Metallurgy and

    2 天前 · International Journal of Minerals, Metallurgy and Materials (IJMMM, ISSN 1674-4799, CN 11-5787/TF, monthly, started in 1994, formerly known as Journal of University of Science and Technology Beijing) is an international journal devoted to publishing original research articles (and occasional invited reviews) on all aspects of minerals processing, physical metallurgy, process metallurgy, and ...

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  • OPERATIONS STRATEGIES FOR VERTICAL SHAFT LIME

    2012-3-12 · ensure that the material is adequately processed and that energy consumption in the system is minimized (b) Repeatability Repeatability is a characteristic desired by kiln operator. A good kiln should achieve the same level of productivity through all cycles. This will assure consistent quality of products.

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  • Gas Discharge Tubes - Introduction - G3YNH

    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).

    Get Price
  • Stress-strain curve | Rime's Wiki

    2020-11-26 · Discharge tube: current vs. voltage characteristic. Shown below is a 'typical' current vs. voltage characteristic for a gas discharge tube. The graph is only typical however in the sense that all tubes exhibit the conduction behaviour shown, but the corresponding voltages and currents, and the relative lengths of the various regions, are highly variable.

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  • An Index of Refractory Organics - EPA

    ----- ABSTRACT Refractory waterborne organics resist biodegradation, accumulate in the environment and can inhibit life forms. This research develops laboratory techniques for, and interpretations of, a Refractory Index (R.I.) to assess quantitatively the persistency of refractory organics and uses the R.I. determination to evaluate some 38 industrial, natural and combined or- ganics.

    Get Price
  • Mechanical Properties of Steels for Cold-Formed Steel ...

    2020-7-1 · It is highly important to clarify the high-temperature mechanical properties in the design of cold-formed steel (CFS) structures under fire conditions due to the unique deterioration feature in material properties under fire environment and associated reduction to the mechanical performance of members. This paper presents the mechanical properties of widely used steels for cold-formed steel ...

    Get Price
  • 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 ...

    Get Price
  • CN101094816B - Refractory materials - Google Patents

    Discuss; 239000011819 refractory material Substances 0.000 title abstract description 128; 239000000463 material Substances 0.000 claims abstract description 198; 239000011521 gla

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  • Self flowing refractory castables : study of the

    Refractories are enabling materials in that their primary function is to facilitate the production of other materials such as metals, glasses, petrochemicals, and cements. They have enabled the utilization of heat to make materials since the Bronze Age. Although, in recent years, a number of studies concerning the many complex variables that determine the rheologic, hydraulic and ceramic ...

    Get Price
  • Understanding the heap biooxidation of sulfidic

    An investigation has been conducted into the nature and rates of the physical, chemical, biological, and thermal processes involved in the heap biooxidation of pyrite from refractory gold ores. A heap-scale model of the ideal process was developed, aided by a systematic experimental approach, which accounts for the following phenomena. Grain-Scale Kinetics - The thermal and chemical ...

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  • System for optimising the formation of refractory

    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).

    Get Price
  • spectroscopy ch 3 - New Jersey Institute of Technology

    1. A system to optimize the conforming of refractory moulds for the fabrication of multiple alloy castings in fixed dental prostheses such as copings, crowns, onlays, inlays, straight and curved fixed bridges (up to half an arch) characterized by the development of a metal-mechanic appliance that is installed in conventional horizontal pivoting arm centrifugal casting machines to allow for the ...

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  • PowerPoint Presentation

    2005-11-28 · Table .3 shows the characteristic absorption wavelengths for some functional groups. For instance a peak found at 2960-2870 cm -1 is usually due to the absorbance by the methyl group. Other frequencies indicate certain functional groups such as aromatic rings, OH groups, NH groups, etc. Absorbance peaks correlated with the presence of certain ...

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  • An Index of Refractory Organics - EPA

    ----- ABSTRACT Refractory waterborne organics resist biodegradation, accumulate in the environment and can inhibit life forms. This research develops laboratory techniques for, and interpretations of, a Refractory Index (R.I.) to assess quantitatively the persistency of refractory organics and uses the R.I. determination to evaluate some 38 industrial, natural and combined or- ganics.

    Get Price
  • Chapter 16 Composites - BGU

    2015-2-25 · Large-particle composites are utilized with all three material types (metals,poly-mers, and ceramics). The cermets are examples of ceramicÐmetal composites. The most common cermet is the cemented carbide,which is composed of extremely hard particles of a refractory carbide ceramic such as tungsten carbide (WC) or titanium

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  • CN101094816B - Refractory materials - Google Patents

    Discuss; 239000011819 refractory material Substances 0.000 title abstract description 128; 239000000463 material Substances 0.000 claims abstract description 198; 239000011521 gla

    Get Price
  • Österreichische Keramische Gesellschaft

    2019-10-16 · of a MgO/MA-spinel refractory material may be 80 GPa although the grains have Young’s moduli of approximately 300 GPa and the uncracked matrix has a Young’s modulus of 110 GPa. The impact of parameters like the grain size distribution, the volume fraction, the thermal expansion mismatch and others on the fracture during

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  • Self flowing refractory castables : study of the

    Refractories are enabling materials in that their primary function is to facilitate the production of other materials such as metals, glasses, petrochemicals, and cements. They have enabled the utilization of heat to make materials since the Bronze Age. Although, in recent years, a number of studies concerning the many complex variables that determine the rheologic, hydraulic and ceramic ...

    Get Price
  • Mechanical Properties of Steels for Cold-Formed Steel ...

    2020-7-1 · It is highly important to clarify the high-temperature mechanical properties in the design of cold-formed steel (CFS) structures under fire conditions due to the unique deterioration feature in material properties under fire environment and associated reduction to the mechanical performance of members. This paper presents the mechanical properties of widely used steels for cold-formed steel ...

    Get Price
  • Lightning for Energy and Material Uses: A Structured ...

    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).

    Get Price
  • Materials Science News - Elsevier

    1 Background. This work is structured as a follow‐up to an earlier article related to catching lightning for energy, [] a review of what exists in the academic literature related to using a tower or rocket with a wire tether to guide a strike to earth, and then capture some part of its power with a buried inductor. Rocket triggering is a well‐established protocol for studying lightning ...

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  • Advances in thermophotovoltaics: materials, devices

    2021-5-26 · The material has so-called charge-density wave (CDW) phases where the crystal distorts like a wave in response to temperature and light intensity. These structural changes have a profound effect on the material’s electronic properties including resistivity, which enables the material to demonstrate a metal-to-insulator transition.

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