Influence of Y2O3 on densification, flexural strength and heat shock resistance of cordierite-based composite ceramics

Hu, Cheng; Xiang, Weiheng; Chen, Ping; Li, Qing; Xiang, Ruiheng; Zhou, Libo

doi:10.1016/j.ceramint.2021.09.082

Cited by 6 publications

(5 citation statements)

References 38 publications

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“…In Table 3, researchers usually introduce some second phases into cordierite ceramics to improve the mechanical properties of cordierite ceramics 15,35 . However, cordierite ceramics will experience thermal stress as a result of the mismatch in the CTE of these phases during heating and cooling, resulting in crack formation in the samples.…”

Section: Resultsmentioning

confidence: 99%

“…In Table 3, researchers usually introduce some second phases into cordierite ceramics to improve the mechanical properties of cordierite ceramics. 15,35 However, cordierite ceramics will experience thermal stress as a result of the mismatch in the CTE of these phases during heating and cooling, resulting in crack formation in the samples. Furthermore, the presence of these second phases may also hinder pores exclusion during sintering, leading to a decline in the bulk density and the fracture strength of cordierite ceramics as well.…”

Section: Physical Properties Of the Cordierite Ceramicsmentioning

confidence: 99%

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A simple method for the preparation of cordierite ceramics with high strength and low thermal expansion coefficient

Li,

Jiang,

Cui

et al. 2024

Int J Applied Ceramic Tech

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Cordierite ceramics have great application prospects due to their very low coefficient of thermal expansion. However, the low purity of ceramics leads to their unsatisfactory fracture strength, which has always been a research focus. Herein, by applying external pressure to the green body of mixed raw materials and optimizing the synthesis temperature, high‐purity cordierite powder was prepared, and then it was used as the starting material for the fabrication of high‐strength cordierite ceramics. The optimal sample exhibited a flexural strength of 146 MPa, which is about 1.4 times that of the cordierite ceramics reported in the literature. This is attributed to applied external pressure increasing the contact area of raw materials, leading to a more thorough reaction, and the content of the α‐cordierite phase is 98.4 wt% in the sample synthesized at 1275°C. Concurrently, the samples possessed a thermal expansion coefficient of only 1.9 × 10−6°C−1 (room temperature to 800°C). In addition, the increase in columnar crystal volume fraction is also one of the reasons for the high strength and low thermal expansion coefficient of cordierite ceramics.

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Section: Resultsmentioning

confidence: 99%

Section: Physical Properties Of the Cordierite Ceramicsmentioning

confidence: 99%

A simple method for the preparation of cordierite ceramics with high strength and low thermal expansion coefficient

Li,

Jiang,

Cui

et al. 2024

Int J Applied Ceramic Tech

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“…Therefore, various additives like Y 2 O 3 [10], La 2 O 3 [11], and RE(NO 3 ) 3 [12] (RE = rare earth element), etc., as well as the combination of Al 2 O 3 -RE 2 O 3 [13][14][15], AlN-RE 2 O 3 [16,17], and Er 2 O 3 -Y 2 O 3 [18] have been used in the sintering of SiC ceramics to improve its sinterability by liquid phase generation. Further, the Y 2 O 3 additive has been used in various ceramics, including SiC [19][20][21][22], Si 3 N 4 [23,24], TiC [25], ZrB 2 -SiC [26][27][28][29][30], AlN-SiC [31], WC [32][33][34], and cordierite [35], etc. Some references [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] mentioned that the Y 2 O 3 additive could promote the densification of the materials and influence their mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…Further, the Y 2 O 3 additive has been used in various ceramics, including SiC [19][20][21][22], Si 3 N 4 [23,24], TiC [25], ZrB 2 -SiC [26][27][28][29][30], AlN-SiC [31], WC [32][33][34], and cordierite [35], etc. Some references [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] mentioned that the Y 2 O 3 additive could promote the densification of the materials and influence their mechanical properties. Cheng et al [25] presented that Y 2 O 3 can improve the mechanical properties of TiC ceramics by pinning at the grain boundary.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Tribological Behaviors of Hot-Pressed SiC/SiCw-Y2O3 Ceramics with Different Y2O3 Contents

et al. 2023

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Sintering additives are commonly used to reduce the conditions required for densification in composite ceramics without compromising their performances simultaneously. Herein, SiC/SiCw-Y2O3 composite ceramics with 10 vol.% SiC whiskers (SiCw) and different Y2O3 contents (0, 2.5, 5, 7.5, and 10 vol.%) were fabricated by hot-pressed sintering at 1800 °C, and the effects of Y2O3 content on the microstructure, mechanical properties, and tribological behaviors were investigated. It was found that the increased Y2O3 content can promote the densification of SiC/SiCw-Y2O3 composite ceramics, as evidenced by compact microstructure and increased relative density. The Vickers hardness, fracture toughness, and flexural strength also increased when Y2O3 content increased from 2.5 vol.% to 7.5 vol.%. However, excessive Y2O3 (10 vol.%) aggregated around SiC and SiCw weakens its positive effect. Furthermore, the Y2O3 additive also reduces the coefficient of friction (COF) of SiC/SiCw-Y2O3 composite ceramics, the higher the Y2O3 content, the lower the COF. The wear resistance of SiC/SiCw-Y2O3 composite ceramics is strongly affected by their microstructure and mechanical properties, and as-sintered SiC ceramic with 7.5 vol.% Y2O3 (Y075) shows the optimal wear resistance. The relative density, Vickers hardness, fracture toughness, and flexural strength of Y075 are 97.0%, 21.6 GPa, 7.7 MPa · m1/2, and 573.2 MPa, respectively, the specific wear rate of Y075 is 11.8% of that for its competitor with 2.5 vol.% Y2O3.

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“…Additionally, the porous structure of diatom made it a potential heterogeneous catalyst [20][21][22]. Yttrium oxide (Y 2 O 3 ) is an essential engineering compound in various fields because of its physical and chemical properties, such as relatively large bandgap energy, high melting point, and high permittivity [23][24][25][26]. Previously, Eu-doped Y 2 O 3 nanostructures were prepared through several processes such as the combustion method [27], hydrothermal method [28], laser vaporization [29], sol gel method [30] and co-precipitation method [31], Precipitation method [32], and evaporation method [33] for various applications of thermoluminescence, photoluminescence imaging and luminescence.…”

Section: Introductionmentioning

confidence: 99%

Europium-Doped Y2O3-Coated Diatomite Nanomaterials: Hydrothermal Synthesis, Characterization, Optical Study with Enhanced Photocatalytic Performance

Hanifehpour¹,

Abdolmaleki²,

Joo

2021

Inorganics

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Eu-doped Y2O3 coated diatomite nanostructures with variable Eu3+ contents were synthesized by a facile hydrothermal technique. The products were characterized by means of energy dispersive X-ray photoelectron spectroscopy (EDX), scanning electron microscopy (SEM), powder X-ray diffraction (PXRD), Brunauer–Emmett–Teller (BET), UV-vis diffuse reflectance spectroscopy, and photoluminescence spectroscopy techniques. As claimed by PXRD, the particles were crystallized excellently and attributed to the cubic phase of Y2O3. The influence of substitution of Eu3+ ions into Y2O3 lattice caused a redshift in the absorbance and a decrease in the bandgap of as-prepared coated compounds. The pore volume and BET specific surface area of Eu-doped Y2O3-coated diatomite is greater than uncoated biosilica. The sonophotocata-lytic activities of as-synthesized specimens were evaluated for the degradation of Reactive Blue 19. The effect of various specifications such as ultrasonic power, catalyst amount, and primary dye concentration was explored.

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Influence of Y2O3 on densification, flexural strength and heat shock resistance of cordierite-based composite ceramics

Cited by 6 publications

References 38 publications

A simple method for the preparation of cordierite ceramics with high strength and low thermal expansion coefficient

A simple method for the preparation of cordierite ceramics with high strength and low thermal expansion coefficient

Mechanical and Tribological Behaviors of Hot-Pressed SiC/SiCw-Y2O3 Ceramics with Different Y2O3 Contents

Europium-Doped Y2O3-Coated Diatomite Nanomaterials: Hydrothermal Synthesis, Characterization, Optical Study with Enhanced Photocatalytic Performance

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