Thermal properties of a prospective thermal barrier material: Yb3Al5O12

Wang, Xiaofei; Xiang, Huimin; Sun, Xiaohua; Liu, Jiachen; Hou, Feng; Zhou, Yanchun

doi:10.1557/jmr.2014.319

Cited by 50 publications

(11 citation statements)

References 41 publications

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“…Though the thermal conductivity of the coating was increased after heat treatment, the maximum thermal conductivity was still lower than 2 W/(m·K). The thermal conductivities of the thermal‐aged coatings above 800°C were close to the minimum thermal conductivity of some reported thermal insulating materials, such as bulk Y 3 Al 5 O 12 (1.59 W/(m·K)), bulk Yb 3 Al 5 O 12 (1.22 W/(m·K)), and bulk γ‐Y 2 Si 2 O 7 (1.16 W/(m·K)) …”

Section: Resultssupporting

confidence: 77%

Microstructure evolution and thermomechanical properties of plasma‐sprayed Yb₂SiO₅ coating during thermal aging

Zhong

Niu

et al. 2017

J Am Ceram Soc

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Rare‐earth monosilicates (RE2SiO5, RE: rare‐earth elements), such as Yb2SiO5, have been developed for potential application as environmental barrier coating (EBC) materials. Yb2SiO5 coating would experience microstructure evolution under high‐temperature environment and accordingly its thermomechanical properties would be altered. In this study, Yb2SiO5 coating was fabricated by atmospheric plasma spray technique. The phase stability and microstructure change before and after thermal aging at 1300°C, 1400°C, and 1500°C were investigated. The changes in mechanical and thermal properties were characterized. The results showed that the as‐sprayed coating was mainly composed of Yb2SiO5 with a small amount of Yb2O3 and amorphous phase. Defects in the coating, including interfaces, pores, and microcracks, were greatly reduced with grain growth after thermal treatment. Thermal aging significantly modified the thermal and mechanical properties of the coating. The average CTE was increased by 13.1%, and the hardness and elastic modulus was increased by 42.4% and 49.4%, respectively, after thermal aging at 1500°C for 50 hour. The thermal conductivity of thermal‐aged coating was much higher than that of the as‐sprayed coating, which was still less than 2 W/(m·K). The influence of coating microstructure on the properties was analyzed and related to the failure mechanism of EBCs.

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Section: Resultssupporting

confidence: 77%

Microstructure evolution and thermomechanical properties of plasma‐sprayed Yb₂SiO₅ coating during thermal aging

Zhong

Niu

et al. 2017

J Am Ceram Soc

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“…From this equation, the thermal conductivities of Yb 2 SiO 5 are extrapolated to be 2.3 and 1.5 W (m·K) −1 , respectively, at 300 and 1200 K, which are in good agreement with the values reported by Lee (1.3~1.4 at 200°C–1400°C) . Therefore, Yb 2 SiO 5 has a lower thermal conductivity than that of most thermal insulating materials such as YSZ, La 2 Zr 2 O 7 , γ‐Y 2 Si 2 O 7 , Y 4 Al 2 O 9 , and β‐Yb 2 Si 2 O 7 . Xiang et al concluded that the low thermal conductivity of Yb 2 SiO 5 could be traced back to the heterogeneous bond strength.…”

Section: Resultsmentioning

confidence: 99%

Mechanical and Thermal Properties of Yb₂SiO₅: A Promising Material for T/EBCs Applications

et al. 2016

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Yb 2 SiO 5 is a promising material for thermal/environmental barrier coatings (T/EBCs), and its mechanical and thermal properties, which are essential to the coating design and applications, are investigated in this work. Yb 2 SiO 5 has relatively high fracture toughness, bending and compressive strength, but low Young's modulus. It is also tolerant to damage, which is underpinned by grain delamination and cleavage along {100}, {001}, and {040} planes. The average linear coefficient of thermal expansion (CTE) is 6.3 3 10 -6 K -1 (473-1673 K) and the anisotropic CTEs are: a a = (2.98 AE 0.16) 3 10 -6 K -1 ,a b = (6.51 AE 0.19) 3 10 -6 K -1 , and a c = (9.08 AE 0.16) 3 10 -6 K -1 . The thermal conductivities are 2.3 and 1.5 W (mÁK) -1 at 300 and 1200 K, respectively. The unique combination of these properties warrants Yb 2 SiO 5 promising for T/EBCs applications.(2). Sintering of the Yb 2 SiO 5 Powders The Yb 2 SiO 5 powders were uniaxially pressed at 30 MPa and then isostatically cold-pressed at 260 MPa to prepare green bodies. The size of the green bodies was 44 mm in J. Smialek-contributing editor Manuscript No. 37252.

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“…Besides the more widely studied fluorite, pyrochlore, and perovskite oxides, other crystal structures are also considered for TBC applications. Rare earth aluminum oxides, metal phosphate, and rare earth silicates have all been demonstrated to have low κ . However, to implement these materials in TBC applications, other properties should also be taken into consideration, such as the high temperature stability, high CTE, and high fracture toughness.…”

Section: High‐temperature Thermal Transport In Dense Materialsmentioning

confidence: 99%

Advanced Materials for High‐Temperature Thermal Transport

Shin

Wang

Luo

et al. 2019

Adv Funct Materials

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High temperature processes are widely used in a variety of existing and emerging industrial and aerospace applications. The thermal properties of high‐temperature materials thus play an important role in controlling the thermal energy, as highlighted by successful applications of thermal barrier coating and aerogels. While thermal transport processes at room and low temperature have witnessed tremendous progress in the past two decades, particularly on the fronts of understanding basic heat transfer properties at the micro‐ and nanoscale, the understanding at high temperature is still at the nascent stage, owing to several unique features at high temperature, such as the dominant Umklapp scattering effect that can render a crystalline material amorphous‐like thermal properties, and the important radiation contribution at high temperature. This lack of systematic understanding, coupled with the challenges in maintaining high‐temperature stability in a large number of materials, has limited the development of materials to meet the thermal transport properties pertaining to several current and emerging high‐temperature applications. This Review is aimed at providing an overview of the basic mechanisms governing thermal transport processes at high temperature, to identify their unique features and challenges, and to explore opportunities in material research for high‐temperature thermal materials.

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Thermal properties of a prospective thermal barrier material: Yb₃Al₅O₁₂

Abstract: Abstract

Cited by 50 publications

References 41 publications

Microstructure evolution and thermomechanical properties of plasma‐sprayed Yb₂SiO₅ coating during thermal aging

Microstructure evolution and thermomechanical properties of plasma‐sprayed Yb₂SiO₅ coating during thermal aging

Mechanical and Thermal Properties of Yb₂SiO₅: A Promising Material for T/EBCs Applications

Advanced Materials for High‐Temperature Thermal Transport

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Thermal properties of a prospective thermal barrier material: Yb3Al5O12

Abstract: Abstract

Cited by 50 publications

References 41 publications

Microstructure evolution and thermomechanical properties of plasma‐sprayed Yb2SiO5 coating during thermal aging

Microstructure evolution and thermomechanical properties of plasma‐sprayed Yb2SiO5 coating during thermal aging

Mechanical and Thermal Properties of Yb2SiO5: A Promising Material for T/EBCs Applications

Advanced Materials for High‐Temperature Thermal Transport

Contact Info

Product

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Thermal properties of a prospective thermal barrier material: Yb₃Al₅O₁₂

Microstructure evolution and thermomechanical properties of plasma‐sprayed Yb₂SiO₅ coating during thermal aging

Microstructure evolution and thermomechanical properties of plasma‐sprayed Yb₂SiO₅ coating during thermal aging

Mechanical and Thermal Properties of Yb₂SiO₅: A Promising Material for T/EBCs Applications