Dynamic and static corrosion of alpha-alumina bonded refractory in contact with molten soda-lime-silica (SLS) glass

Wang, Zihua; Maotsela, Tlamelo; Toperesu, Phillip Masimba; Kale, Girish M.; Daji, Jafar; Parkinson, David E.

doi:10.1016/j.ceramint.2018.09.235

Cited by 13 publications

(4 citation statements)

References 17 publications

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“…Refractories often face corrosive wear due to diffusion in liquid slags at high temperatures [36][37][38][39][40] .…”

Section: Introductionmentioning

confidence: 99%

Deep Learning revealed statistics of the MgO particles dissolution rate in a CaO–Al2O3–SiO2–MgO slag

Brunner,

Chamasemani,

Lenzhofer

2024

Preprint

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Accelerated material development for refractory ceramics triggers enhanced possibilities in context to enhanced energy efficiency for industrial processes. Here, the gathering of comprehensive material data is essential. High temperature-confocal laser scanning microscopy (HT-CLSM) displays a highly suitable in-situ method to study the dissolution kinetics within the slag over time. However, a major challenge concerns the efficient and accurate processing of the large amount of collected image data. Here, the application of encoder-decoder convolutional network (U-Net) for the fully automated evaluation of the particle dissolution rate, overcoming manual evaluation drawbacks and providing accurate, fast and, sufficient statistical information is introduced. The developed U-Net allows an automated diameter evaluation of the MgO particles' dissolution in the silicate slag from 15 HT-CLSM experiments at three experimental temperatures 1450, 1500, and 1550°C. Moreover, the model can be applied to particle tracking and identification in various domains.

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“…Refractories often face corrosive wear due to diffusion in liquid slags at high temperatures [36][37][38][39][40] .…”

Section: Introductionmentioning

confidence: 99%

Deep Learning revealed statistics of the MgO particles dissolution rate in a CaO–Al2O3–SiO2–MgO slag

Brunner,

Chamasemani,

Lenzhofer

2024

Preprint

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“…For instance, due to the low chemical potential gradient of Na 2 O between the glass melt and Na 2 O-β-Al 2 O 3 , one called beta alumina is widely used as the raw materials of channel block to resist the attack by alkali containing glass melt. 12,13 However, the potassium aluminate has various compositional forms such as (KA 11 ) has the best hydration resistance and thermal stability. 14 Hence, it is of great interest to explore the corrosion resistance of potassium aluminate KA 11 as a sagger matrix material to LNCM cathode materials.…”

Section: Introductionmentioning

confidence: 99%

“…Thanks to their excellent high‐temperature performance and corrosion resistance, a series of K 2 O‐containing compounds, that is, potassium aluminates, could be used as promising candidates to enhance the resistance of the sagger matrix to the attack from alkali oxide Li 2 O‐bearing LNCM materials. For instance, due to the low chemical potential gradient of Na 2 O between the glass melt and Na 2 O‐β‐Al 2 O 3 , one called beta alumina is widely used as the raw materials of channel block to resist the attack by alkali containing glass melt 12,13 . However, the potassium aluminate has various compositional forms such as K 2 O·Al 2 O 3 , K 2 O·5Al 2 O 3 , whereas the K 2 O·11Al 2 O 3 (KA 11 ) has the best hydration resistance and thermal stability 14 .…”

Section: Introductionmentioning

confidence: 99%

Synthesized K₂O·11Al₂O₃ as sagger matrix for the preparation of Li‐ion battery cathode materials at high temperatures

Zhai

Zhou

et al. 2021

Int J Applied Ceramic Tech

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The ternary Li-ion battery cathode materials, for example, Li(Ni x Co y Mn z )O 2 (LNCM) are attractive candidates to be used in high-energy density cell design due to the large specific capacity and high average voltage. [1][2][3] LNCM materials are generally manufactured on an industrial scale through solid-state reactions at elevated temperatures using the Li-, Mn-, Co-, and Mn-bearing as raw material precursors. To ensure the calcination proceeds consecutively at high temperatures, the LNCM precursors were normally loaded in refractory saggers prepared with corundum (Al 2 O 3 ),However, it has been reported in previous work via post-mortem analyses and laboratory-scale tests that the conventional refractory components in refractory sagger matrix can be severely corroded by LNCM materials at elevated temperatures. [5][6][7][8] These refractory compounds are preferentially attacked by Li 2 O from LNCM materials/precursors, forming Li 2 O-bearing phases, that is, LiAlSiO 4 , LiAlSi 2 O 6 , and LiAlO 2 with volume expansions. As a result, parallel cracks along the refractory/LCNM materials interfaces were generated, leading to the spalling of corroded refractory materials

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“…For the investigation of long-term corrosion in melts, static crucible tests or dynamic finger immersion tests are applied [ 19 , 20 , 21 ]. The immersion tests mostly take less than 12 h. The crucible corrosion test is commonly used in the field of refractory oxide ceramics and is characterized by significantly longer testing times [ 19 , 21 , 22 ]. For example, Sellers et al [ 23 ] applied the crucible method to study the corrosion of 316L stainless steel and Hastelloy-N superalloy in a molten LiF-NaF-KF salt eutectic.…”

Section: Introductionmentioning

confidence: 99%

Corrosion-Resistant Steel–MgO Composites as Refractory Materials for Molten Aluminum Alloys

et al. 2020

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In this study, a novel metal matrix composite based on 60 vol% 316L stainless steel and 40 vol% MgO manufactured by powder metallurgy technology was developed. The corrosion resistance of the developed steel–MgO composite material against molten aluminum alloy AlSi7Mg0.3 was investigated by means of wettability tests and long-term crucible corrosion tests. The wettability tests were carried out using the sessile drop method with the capillary purification technique in a hot-stage microscope (HSM). Static corrosion tests were performed in molten aluminum alloy at 850 °C for 168 h to evaluate the impact of pre-oxidation of the composite surface on the corrosion resistance. The pre-oxidation of steel–MgO composites was carried out at 850 and 1000 °C for 24 h, based on preliminary investigations using thermogravimetry (TG) and dilatometry. The influence of the pre-oxidation on the composite structure, the corrosion resistance, and the phase formation at the interface between the steel–MgO composite and aluminum alloy was analyzed using SEM/EDS and XRD. The impact of the steel–MgO composite material on the composition of the aluminum alloy regarding the type, size, and quantity of the formed precipitations was investigated with the aid of ASPEX PSEM/AFA and SEM/EBSD. It was revealed that the pre-oxidation of the steel–MgO composite at 1000 °C induced the formation of stable MgO-FeO solid solutions on its surface, leading to a significant increase of long-term corrosion resistance against the liquid aluminum alloy.

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Dynamic and static corrosion of alpha-alumina bonded refractory in contact with molten soda-lime-silica (SLS) glass

Abstract: This is a repository copy of Dynamic and static corrosion of alpha-alumina bonded refractory in contact with molten soda-lime-silica (SLS) glass.

Cited by 13 publications

References 17 publications

Deep Learning revealed statistics of the MgO particles dissolution rate in a CaO–Al2O3–SiO2–MgO slag

Deep Learning revealed statistics of the MgO particles dissolution rate in a CaO–Al2O3–SiO2–MgO slag

Synthesized K₂O·11Al₂O₃ as sagger matrix for the preparation of Li‐ion battery cathode materials at high temperatures

Corrosion-Resistant Steel–MgO Composites as Refractory Materials for Molten Aluminum Alloys

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Dynamic and static corrosion of alpha-alumina bonded refractory in contact with molten soda-lime-silica (SLS) glass

Abstract: This is a repository copy of Dynamic and static corrosion of alpha-alumina bonded refractory in contact with molten soda-lime-silica (SLS) glass.

Cited by 13 publications

References 17 publications

Deep Learning revealed statistics of the MgO particles dissolution rate in a CaO–Al2O3–SiO2–MgO slag

Deep Learning revealed statistics of the MgO particles dissolution rate in a CaO–Al2O3–SiO2–MgO slag

Synthesized K2O·11Al2O3 as sagger matrix for the preparation of Li‐ion battery cathode materials at high temperatures

Corrosion-Resistant Steel–MgO Composites as Refractory Materials for Molten Aluminum Alloys

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Synthesized K₂O·11Al₂O₃ as sagger matrix for the preparation of Li‐ion battery cathode materials at high temperatures