Microstructural analysis of corroded alumina-spinel castable refractories

Korgul, P.; Wilson, D.R.; Lee, W.E.

doi:10.1016/s0955-2219(96)00073-8

Cited by 89 publications

(59 citation statements)

References 2 publications

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“…Some authors stated that the alumina is provided by the aggregates [8,17,18], whereas others did not mention whether the source of such oxide would be the coarse or fine grains of the formulation [10]. Nevertheless, in general, it is accepted that the corrosion process is initiated by the attack of the matrix components, followed by the dissolution of the aggregates [10,11,13].…”

Section: Al 2 O 3 -Mgo Cement-bonded Castables' Corrosion Mechanismmentioning

confidence: 99%

See 1 more Smart Citation

CA6 impact on the corrosion behavior of cement-bonded spinel-containing refractory castables: An analysis based on thermodynamic simulations

Martínez

Luz

Braulio

et al. 2015

Ceramics International

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Section: Al 2 O 3 -Mgo Cement-bonded Castables' Corrosion Mechanismmentioning

confidence: 99%

“…Nevertheless, in general, it is accepted that the corrosion process is initiated by the attack of the matrix components, followed by the dissolution of the aggregates [10,11,13].…”

Section: Al 2 O 3 -Mgo Cement-bonded Castables' Corrosion Mechanismmentioning

confidence: 99%

CA6 impact on the corrosion behavior of cement-bonded spinel-containing refractory castables: An analysis based on thermodynamic simulations

Martínez

Luz

Braulio

et al. 2015

Ceramics International

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“…MgAl 2 O 4 phase illustrates that an interface reaction occurred in the interface of Al and Al 2 O 3 nanoparticles due to existence of Mg element. MgAl 2 O 4 phase has some advantages such as low density, high melting point, good wear resistance, good heat stability, and high mechanical properties [43,44]. Furthermore, relatively good wetting was obtained at the interface Al, MgAl 2 O 4 , and Al 2 O 3 [45] .…”

Section: Microstructure Characterization Of the Rheoformed Composite mentioning

confidence: 99%

Microstructure, Mechanical Properties and Wear Behavior of the Rheoformed 2024 Aluminum Matrix Composite Component Reinforced by Al2O3 Nanoparticles

Jiang

Xiao

Che

et al. 2018

Metals

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Abstract:The 2024 nanocomposite reinforced with Al 2 O 3 nanoparticles was fabricated by the ultrasonic assisted semisolid stirring (UASS) method and rheoformed into a cylinder component. Microstructure, mechanical properties, and wear behavior of the rheoformed composite components were investigated. The results showed that the composite components with complete filling status and a good surface were rheoformed successfully. The deformation of semisolid slurries was mainly dominated by flow of liquid incorporating solid grains (FLS), sliding between solid grains (SSG), and plastic deformation of solid grains (PDS). Mechanical properties of the rheoformed composite components were influenced by stirring temperature, stirring time, and volume fraction of Al 2 O 3 nanoparticles. The optimal ultimate tensile strength (UTS) of 358 MPa and YS of 245 MPa were obtained at the bottom of the rheoformed composite components after a 25-min stirring of composite semisolid slurry with 5% Al 2 O 3 nanoparticles at 620 • C. Enhancement of mechanical properties was attributed to high density dislocations and dislocation tangles and uniform dispersed Al 2 O 3 nanoparticles in the aluminum matrix. Natural ageing led to the occurrence of needle-like Al 2 CuMg phase and short-rod-like Al 2 Cu phase. UTS of 417 MPa and YS of 328 MPa of the rheoformed composite components were achieved after T6 heat treatment. Improvement of mechanical properties is due to the more precipitated needle-like Al 2 CuMg phase and short-rod-like Al 2 Cu phase. Wear resistance of the rheoformed composite components was higher than that of the rheoformed matrix component. Wear resistance of the rheoformed composite component increased with an increase in Al 2 O 3 nanoparticles from 1% to 7%. A slight decrease in wear rate resulted from 10% Al 2 O 3 nanoparticles due to greater agglomeration of Al 2 O 3 nanoparticles. A combination mechanism of adhesion and delamination was determined according to worn surface morphology.

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“…5 For Korgul et al, MgO contained in the castable is partially dissolved by the slag, leading to a high viscous MgO-rich less corrosive slag. 6,7 Additionally, the CaO of the slag reacts at high temperature with the Al 2 O 3 of the castable to form CA 2 at 1200 • C, and CA 6 above 1400 • C. Furthermore, Criado and Estrada studied the dilatometric effects associated with the expansive formations of these calcium aluminates. 8 It is related in the literature that these high temperature resulting phases may interlock and link with other phases, thus improving the properties of the castable.…”

Section: Introductionmentioning

confidence: 99%

Evolution of elastic properties and microstructural changes versus temperature in bonding phases of alumina and alumina–magnesia refractory castables

Auvray¹,

Gault²,

Huger³

2007

Journal of the European Ceramic Society

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Microstructural analysis of corroded alumina-spinel castable refractories

Cited by 89 publications

References 2 publications

CA6 impact on the corrosion behavior of cement-bonded spinel-containing refractory castables: An analysis based on thermodynamic simulations

CA6 impact on the corrosion behavior of cement-bonded spinel-containing refractory castables: An analysis based on thermodynamic simulations

Microstructure, Mechanical Properties and Wear Behavior of the Rheoformed 2024 Aluminum Matrix Composite Component Reinforced by Al2O3 Nanoparticles

Evolution of elastic properties and microstructural changes versus temperature in bonding phases of alumina and alumina–magnesia refractory castables

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