Thermal Shock Resistance (TSR) and Thermal Fatigue Resistance (TFR) of Refractory Materials. Evaluation Method Based on the Dynamic Elastic Modulus

2014 ◽  
pp. 5119-5128
Author(s):  
Nicolás M. Rendtorff ◽  
Esteban F. Aglietti
Keyword(s):  
Elastic Modulus ◽  
Thermal Shock ◽  
Fatigue Resistance ◽  
Thermal Fatigue ◽  
Thermal Shock Resistance ◽  
Evaluation Method ◽  
Dynamic Elastic Modulus ◽  
Refractory Materials ◽  
Thermal Fatigue Resistance ◽  
Shock Resistance

scholarly journals Optimization of Properties for Alumina-Spinel Refractory Castables by CMA (CaO-MgO-Al2O3) Aggregates

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3050
Author(s):  
Hai Tang ◽  
Chunxue Li ◽  
Jianying Gao ◽  
Bruno Touzo ◽  
Chunfeng Liu ◽  
...  
Keyword(s):  
Particle Size ◽  
Bulk Density ◽  
Thermal Shock ◽  
Fatigue Resistance ◽  
Thermal Fatigue ◽  
Thermal Shock Resistance ◽  
Thermal Fatigue Resistance ◽  
Spinel Refractory ◽  
Refractory Castables ◽  
Shock Resistance

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-Al2O3) 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 refractory castables containing CMA aggregates were evaluated contrastively. The results demonstrated that the incorporation of CMA aggregates can significantly improve thermal shock resistance and thermal fatigue resistance of castables, although companying with slight decrease in the bulk density and strength. Moreover, slag penetration resistance of castables can also be enhanced by CMA aggregates with appropriate particle size. The influence of CMA aggregates on properties of alumina-spinel refractory castables depended strongly on their particle size.

scholarly journals Evaluation Method of Thermal Shock Resistance of Cermets

2012 ◽  
Vol 59 (11) ◽  
pp. 637-644 ◽  
Author(s):  
Tetsushi MASTUDA ◽  
Teiichi KIMURA ◽  
Hideaki MATSUBARA
Keyword(s):  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Evaluation Method ◽  
Shock Resistance

scholarly journals EVALUATION AND CHARACTERIZATION OF GAKEM AND ABOUCHICHE CLAY SAMPLES IN BEKWARRA LGA OF CROSS RIVER STATE FOR USE AS REFRACTORY MATERIALS

2017 ◽  
Vol 36 (3) ◽  
pp. 844-848
Author(s):  
FA Ovat ◽  
DE Ewa ◽  
EA Egbe
Keyword(s):  
Bulk Density ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Linear Shrinkage ◽  
Apparent Porosity ◽  
Refractory Materials ◽  
Crushing Strength ◽  
Cold Crushing Strength ◽  
Shock Resistance

The characterization of some clay as refractory materials for furnace lining has become relevant to find solutions to the cost involved in the purchase and importation of these refractory materials. This work investigated the refractory properties of clay samples for their suitability for use in the industries. Clay samples were collected from Gakem and Abouchiche areas and analysed for physical and chemical properties to determine the suitability of the clays as refractory materials. The results showed cold crushing strength (21.46MN/m2), thermal shock resistance (27 cycles), bulk density (3.52g/cm3), linear shrinkage(3.80%), apparent porosity (28.84%) and permeability (80%) for Gakem; and cold cold crushing strength (18.40MN/m2), thermal shock resistance (25 cycles), bulk density(2.81g/cm3), linear shrinkage (3.70%), apparent porosity (25.86%) and permeability (77%) for Abouchiche respectively. The chemical compositions of these clay samples were also investigated. The results showed that the samples fall under Aluminosilicate type of clay because of their high values of Aluminium Oxide and Silicon Oxide. Tests showed that clay from these areas can be used to produce refractory materials that can withstand a furnace temperature of about 1600°C. http://dx.doi.org/10.4314/njt.v36i3.26

KUBOTA ALLOY KHR35CL

Alloy Digest ◽  
1999 ◽  
Vol 48 (9) ◽  
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Thermal Shock ◽  
Tensile Properties ◽  
Thermal Fatigue ◽  
Thermal Shock Resistance ◽  
Temperature Performance ◽  
Shock Resistance ◽  
Lower Carbon

Abstract Kubota alloy KRH35CL is similar to KHR35C but contains lower carbon for applications requiring good thermal fatigue and thermal shock resistance. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance as well as casting. Filing Code: SS-761. Producer or source: Kubota Metal Corporation.

Thermal Fatigue of MoSi2 Particulate and Short Fiber Composites

1994 ◽  
Vol 350 ◽  
Author(s):  
M. T. Kush ◽  
J. W. Holmes ◽  
R. Gibala
Keyword(s):  
Thermal Shock ◽  
Fatigue Resistance ◽  
Thermal Fatigue ◽  
Time Profile ◽  
Particulate Composites ◽  
Strain History ◽  
Monolithic Material ◽  
Thermal Fatigue Resistance ◽  
Heating And Cooling ◽  
Temperature Time

AbstractInduction heating of disk shaped specimens was used to compare and contrast the thermal fatigue behavior of MoSi2 and MoSi2-based composites. Specimens were subjected to 5 s heating and cooling cycles between temperature limits of 700°C and 1200°C. The monolithic material and a MoSi2- 10 vol% TiC composite exhibited poor thermal shock resistance and could not be thermally cycled according to this temperature-time profile. A 30 vol% TiC composite exhibited much better thermal shock and thermal fatigue resistance as compared to the monolithic material, but exhibited undesirable oxidation. MoSi2-10 and 30 vol% SiC particulate composites exhibited excellent thermal shock and thermal fatigue resistance compared to that of the monolithic material. A MoSi2-10 vol% SiC whisker composite did not show improved thermal fatigue resistance due to the initial processing defects present in the material. The monolithic material and the 10 vol% TiC composite were also subjected to 30 s heating and cooling cycles between temperature limits of 700°C and 1200°C. Both of these materials exhibited better thermal fatigue resistance at this temperature-time profile, but the 10 vol% TiC composite also exhibited undesirable oxidation. The fatigue results are discussed with reference to the initial microstructure of the specimens and the stress-strain history of the specimens which was obtained by a thermoelastic finite element analysis.

Thermal Fatigue Behavior of Ladle Purging Plug

2010 ◽  
Vol 105-106 ◽  
pp. 158-161
Author(s):  
Hui Zhang ◽  
Yan Ruo Hong ◽  
Hong Xia Li ◽  
Yang Bin
Keyword(s):  
Thermal Shock ◽  
Thermal Fatigue ◽  
Thermal Shock Resistance ◽  
Fatigue Behavior ◽  
Modulus Of Rupture ◽  
Coarse Grained ◽  
Fine Grained ◽  
Shock Resistance ◽  
Thermal Fatigue Behavior ◽  
Fracture Damage

The thermal fatigue behavior of alumina-magnesia based and alumina-chromia based purging plug materials are comparatively studied. By comparing thermal shock parameters, the changes of elastic modulus and hot modulus of rupture after thermal shock cycles, we come to a conclusion that microcracks emerge in the alumina-magnesia based material, which hinder the crack growth during thermal shock cycles. The fine-grained and network structure of alumina-magnesia based material are also helpful to improve thermal shock resistance. However, cracks are difficult to form in the alumina-chromia based material but it tends to fracture damage quickly once the cracks nucleation due to coarse-grained structure of alumina-chromia based material.

Evaluation of Thermal Shock Influence on Cordierite Using Impulse Excitation Technique and Dynamic Mechanical Analysis

2016 ◽  
Vol 721 ◽  
pp. 306-310 ◽  
Author(s):  
Maris Rundans ◽  
Ingunda Sperberga
Keyword(s):  
Elastic Modulus ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Glassy Phase ◽  
Mechanical Analysis ◽  
Self Healing ◽  
Mechanical Fatigue ◽  
Cordierite Ceramic ◽  
Impulse Excitation ◽  
Shock Resistance

Mechanical fatigue due to repeated thermal shock cycling is of great importance for most materials intended for refractory applications. This work explores thermal shock resistance and cyclic thermal shock effects of cordierite ceramic made from clay-containing mixtures. Different means of detection of change in modulus of elasticity have been employed including impulse excitation and dynamic-mechanic tests (DMA). Results have shown that the elastic modulus of cordierite ceramic gradually decreases over thermal shock cycles, the sharpest change being observed after the first cycle. Unlike synthetic cordierite ceramic material, clay-substituted cordierite composites show "self-healing" effect, which can be explained by the gradual filling of cracks with glassy phase that leads to the strengthening of the whole structure of material. This effect is directly dependent upon the composition of the sample and the material with lesser amount of glassy phase can be characterized with the largest inertia of this effect.

New Evaluation Method for Thermal Shock Resistance of Honeycomb Substrates

2016 ◽  
Author(s):  
Akifumi Kawakami ◽  
Yuki Fukumi ◽  
Masaaki Ito ◽  
Shingo Sokawa ◽  
Satoshi Sakashita ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Evaluation Method ◽  
Shock Resistance
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