Thermal properties of single-phase Y2SiO5

Sun, Ziqi; Li, Meishuan; Zhou, Yanchun

doi:10.1016/j.jeurceramsoc.2008.07.026

Cited by 148 publications

(73 citation statements)

References 34 publications

(48 reference statements)

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“…Rare-earth (RE) silicates are acknowledged as third generation of EBC materials, and a number of silicates also have been identified as low-thermal conductivity ceramics [7,8]. RE 2 SiO 5 , for example, has attracted extensive research attention because of its hightemperature stability and water vapor corrosion resistance [5].…”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental determination of the major thermo-mechanical properties of RE 2 SiO 5 (RE = Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y) for environmental and thermal barrier coating applications

Zhao

Zheng

Wang

et al. 2016

Journal of the European Ceramic Society

203

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Section: Introductionmentioning

confidence: 99%

Theoretical and experimental determination of the major thermo-mechanical properties of RE 2 SiO 5 (RE = Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y) for environmental and thermal barrier coating applications

Zhao

Zheng

Wang

et al. 2016

Journal of the European Ceramic Society

203

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“…As an important phase in the SiO 2 -Y 2 O 3 -Si 3 N 4 phase diagram, Y 2 SiO 5 is frequently identified as a precipitated phase at the grain boundaries of sintered Si 3 N 4 with Y 2 O 3 or Y 2 O 3 + SiO 2 as sintering aids. It was confirmed that Y 2 SiO 5 can improve the hightemperature performance of silicon nitride [16,17]. It was thought that the presence of these phases in the powders as-synthesized can improve the high temperature properties after the sintering of the powders.…”

Section: Resultsmentioning

confidence: 89%

The Carbothermal Reduction of Silica with Y₂O₃-MgO Powders

Canikoğlu

2017

Acta Phys. Pol. A

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The aim of this study is to examine the effect of MgO and Y2O3 to the carbothermal reduction and nitridation of silica. The synthetic silica, MgO and Y2O3 powders were premixed (4wt% MgO-6% Y2O3, 5% MgO-5% Y2O3 and 6% MgO-4% Y2O3) in the starting reactants depending on the final powder composition. Carbon black was added to the silica (SiO2) above the stoichiometric amount of oxygen (C/SiO2 ratio of 3). The carbothermal reduction and nitridation process was carried out in a tube furnace at 1400• C, 1450• C, and 1475• C for 3 h under nitrogen gas atmosphere. The synthesized Si3N4 powder properties were examined by using X-ray diffraction, scanning electron microscopy-energy dispersive X-ray spectrosopy. In this study, MgO and Y2O3 powders dispersed in the final Si3N4 powder more homogeneously and thus formable and sinterable the starting mixing material is produced.

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“…6(a), the microcracks and pores in Fig. 3(a) [15,23,24]. As a result, the microcracks and pores are healed.…”

Section: Oxidation Resistance Of Tri-layer Coatingmentioning

confidence: 95%

Fabrication and oxidation resistance of mullite/yttrium silicate multilayer coatings on C/SiC composites

Cai

2017

J Adv Ceram

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Abstract:A tri-layer coating of mullite/Y 2 Si 2 O 7 /(70wt%Y 2 Si 2 O 7 +30wt%Y 2 SiO 5 ) was prepared on carbon fiber reinforced silicon carbide (C/SiC) composite substrate through dip-coating route for the sake of improving oxidation resistance of C/SiC composites. An Al 2 O 3 -SiO 2 sol with high solid content was selected as raw material for mullite, and a slurry of Y 2 O 3 powder filled silicone resin was used to synthesize yttrium silicate. The microstructure, phase composition, and oxidation resistance of the coating were investigated. The as-fabricated coating shows high density and favorable bonding to C/SiC substrate. After oxidation at 1400 and 1500 ℃ for 30 min under static air, the flexural strengths of coated C/SiC composite were both increased by 30%. The desirable thermal stability and the further densification are responsible for excellent oxidation resistance. With the additional help of compatible thermal expansion coefficients among substrate and sub-layers in coating, the coated composite retained 111.2% of original flexural strength after 12 times of thermal shock in air from 1400 ℃ to room temperature. The carbothermal reaction at 1600 ℃ between free carbon in C/SiC substrate and rich SiO 2 in mullite resulted in severe frothing and desquamation of coating and obvious degradation in oxidation resistance.

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Thermal properties of single-phase Y2SiO5

Cited by 148 publications

References 34 publications

Theoretical and experimental determination of the major thermo-mechanical properties of RE 2 SiO 5 (RE = Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y) for environmental and thermal barrier coating applications

Theoretical and experimental determination of the major thermo-mechanical properties of RE 2 SiO 5 (RE = Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y) for environmental and thermal barrier coating applications

The Carbothermal Reduction of Silica with Y₂O₃-MgO Powders

Fabrication and oxidation resistance of mullite/yttrium silicate multilayer coatings on C/SiC composites

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Thermal properties of single-phase Y2SiO5

Cited by 148 publications

References 34 publications

Theoretical and experimental determination of the major thermo-mechanical properties of RE 2 SiO 5 (RE = Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y) for environmental and thermal barrier coating applications

Theoretical and experimental determination of the major thermo-mechanical properties of RE 2 SiO 5 (RE = Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y) for environmental and thermal barrier coating applications

The Carbothermal Reduction of Silica with Y2O3-MgO Powders

Fabrication and oxidation resistance of mullite/yttrium silicate multilayer coatings on C/SiC composites

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The Carbothermal Reduction of Silica with Y₂O₃-MgO Powders