Microstructural Characterization and Thermal Properties of Aluminium Titanate/Talc Ceramic Matrix Composites

Ozsoy, E.; Onen, U.; Boyraz, Tahsin

doi:10.12693/aphyspola.127.1136

Cited by 6 publications

(4 citation statements)

References 7 publications

(5 reference statements)

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“…Meanwhile, it was obviously detected that grain growth accompanied by increasing temperature and microcracks located in grain boundary (Figure 4). As is well‐known, the microcracked morphology observed in all SEM images is the inherent feature of AT‐based materials, which is resulted from high anisotropy of axis induced internal stress 7,42–44 . It was noteworthy that interlocked grains contributing to microcracks network structure were prominent in SEM micrographs with a dense body.…”

Section: Resultsmentioning

confidence: 60%

“…As is well-known, the microcracked morphology observed in all SEM images is the inherent feature of AT-based materials, which is resulted from high anisotropy of axis induced internal stress. 7,[42][43][44] It was noteworthy that interlocked grains contributing to microcracks network structure were prominent in SEM micrographs with a dense body. Furthermore, the elongated grains were also observed at 1450 • C for both of the samples (as indicated by the dashed outline in Figure 6A,B).…”

Section: Microstructure Analysis Of Fired Ceramicsmentioning

confidence: 99%

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Sintering and characterization of aluminum titanate ceramics with enhanced thermomechanical properties

Huang

Song

Chen

et al. 2022

Int J Applied Ceramic Tech

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Aluminum titanate (Al2TiO5) was synthesized from Al2O3‐TiO2 system by solid‐phase reaction with additives of light magnesium carbonate and SiO2, incorporating with silicon carbide (SiC) particle. The influence of additives on the phase composition, microstructure configuration, sintering, and thermomechanical properties of the developed materials was investigated. The experimental results illustrated that the utilization of additives with applicable contents was conducive to the development of complex microstructures. The microstructures characterized by microcracks matrix together with interlocked grains were identified. The samples incorporating SiC and SiO2 simultaneously displayed exceptional densification properties and microstructure as a result of a SiO2 liquid phase accelerating SiC oxidation. Meanwhile, high flexural strength (41.51 MPa) and low thermal expansion coefficient of 0.485 × 10−6 K−1 (RT‐1000 °C) were detected, encouraging refractory applications with high thermomechanical solicitations.

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Section: Resultsmentioning

confidence: 60%

Section: Microstructure Analysis Of Fired Ceramicsmentioning

confidence: 99%

Sintering and characterization of aluminum titanate ceramics with enhanced thermomechanical properties

Huang

Song

Chen

et al. 2022

Int J Applied Ceramic Tech

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“…28,29 Studies have shown that second phase (mullite, feldspar, talc, etc.) [30][31][32][33][34][35] are added to the aluminum titanate ceramic, it can reduce microcrack. Or distributed at the microcrack in the aluminum titanate matrix, the second phase can reduce the degree of lattice distortion of aluminum titanate crystals by physical extrusion, inhibit the further growth and decomposition of aluminum titanate grains, and then improve its thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic properties of aluminum titanate‐mullite composite ceramics containing heat stabilizer

Huang

Yang

Wang

2023

Int J Applied Ceramic Tech

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Using Al 2 O 3 and TiO 2 as raw materials, adding MgO as heat stabilizer and mullite as enhancer, aluminum titanate-mullite multiphase ceramics were successfully prepared by solid phase synthesis. The effects of MgO and mullite were systematically studied on the phase composition, microstructure, thermal stability, sintering properties, and mechanical properties of aluminum titanate ceramics. The results showed that the introduction of Mg 2+ can partially replace Al 3+ to form Mg x Al 2(1-x) Ti (1+x) O 5 solid solution, improved the thermal stability of aluminum titanate ceramics, and promoted the formation and growth of grains, which reduced the sintering temperature. The crack deflections caused by mullite particles improved the mechanical properties. The filling effect of mullite particles and the formation of silica in mullite raw materials were conducive to ceramic densification. The statistics of Mg4M10 sample were as follows: the porosity was only 2.9%, the flexural strength was as high as 64.15 MPa, and the thermal expansion coefficient was 1.35 × 10 −6 K −1 (RT-700 • C), encouraging the application of ceramics with high thermal mechanical properties.

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“…The monoclinic phase exists at the room temperature and the temperatures greater than 1170 °C it transforms to the tetragonal form. The tetragonal phase is constant at temperatures of 1170 -2370 o C, and the cubic phase occurs at over 2370 °C [1][2][3][4][5][6][7]. The transition from tetragonal form to monoclinic phase (about 9%) undergoes large volume change in microstructure which makes difficult to obtain stable sintered zirconia ceramic products.…”

Section: Introductionmentioning

confidence: 99%

Thermal Properties and Microstructural Characterization of Aluminium Titanate (Al2TiO5) / La2O3 -Stabilized Zirconia (ZrO2) Ceramics

Boyraz

2018

Cumhuriyet Science Journal

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In this paper defined the productions and densification behaviour of 8 mole% Lanthana (Lanthanum oxide, La2O3) -stabilized Zirconia (Zirconium Oxide, ZrO2) based composites fabricated by the conventional ceramic production process. La2O3 stabilized zirconia (LSZ, with mole 8% La2O3) has excellent high temperature properties like low thermal conductivity, mechanical properties, elevated melting point, high toleration for thermal shock, superior oxidation resistance and well phase stability. Aluminium titanate (Al2TiO5) low thermal conductivity coupled with well chemical resistance in melted metals and exhibit extremely well thermal shock resistance. In this study, Aluminium titanate / LSZ ceramic with different proportions of Al2TiO5 was prepared by powder metallurgy techniques. The mechanical, thermal and microstructural properties were characterized by XRD, SEM, hardness and dilatometer. The thermal shock resistance performance under water quenching of the as-prepared ceramics was also estimated. As a results shown that the adding of aluminium titanate to LSZ matrix improves the properties of the aluminium titanate / LSZ ceramics.Özet: Bu yazıda, geleneksel seramik üretim yöntemleri ile imal edilen% 8 mol Lanthana (Lantanyum oksit, La2O3) ile stabilize edilmiş Zirkonya (Zirkonyum Oksit, ZrO2) esaslı kompozitlerin üretim ve yoğunlaşma davranışları anlatılmaktadır. , La2O3 ile Stabilize edilmiş (dengelenmiş) zirkonyum dioksit (LSZ, mol% 8 La2O3 ile) termal darbeye karşı yüksek tolerans, düşük termal iletkenlik, mekanik özellikler, yüksek erime noktası, iyi bir faz dengesi ve mükemmel oksidasyon direnci gibi yüksek üstün sıcaklık özelliklerine sahiptir. Alüminyum titanat (Al2Ti05), erimiş metallerde iyi kimyasal dirençle birlikte, termal şok direnci ve düşük termal iletkenliğe sahiptir. Bu çalışmada, farklı yüzdelerdeki Al2TiO5 ile alüminyum titanat / LSZ seramikleri toz metalurjisi teknikleri kullanılarak hazırlandı. Mikroyapısal, mekanik ve termal özellikler XRD, SEM, dilatometre ve sertlik ile karakterize edildi. Hazırlanan seramiklerin suda soğutulmasıyla termal şok direnci davranışı da değerlendirildi. Sonuçlar, alüminyum titanatın LSZ matrisine eklenmesinin alüminyum titanat / LSZ seramiklerinin özelliklerini geliştirdiğini ortaya koydu.

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Microstructural Characterization and Thermal Properties of Aluminium Titanate/Talc Ceramic Matrix Composites

Cited by 6 publications

References 7 publications

Sintering and characterization of aluminum titanate ceramics with enhanced thermomechanical properties

Sintering and characterization of aluminum titanate ceramics with enhanced thermomechanical properties

Thermodynamic properties of aluminum titanate‐mullite composite ceramics containing heat stabilizer

Thermal Properties and Microstructural Characterization of Aluminium Titanate (Al2TiO5) / La2O3 -Stabilized Zirconia (ZrO2) Ceramics

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