Effect of Mn Doping on Microstructure and Thermal Conductivity of (Y0.4Er0.6)3Al5O12 Ceramics Material for Thermal Barrier Coating

doi:10.11901/1005.3093.2023.415

Chinese Journal of Materials Research

2024, Vol. 38

Issue (6): 463-470 DOI: 10.11901/1005.3093.2023.415

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Effect of Mn Doping on Microstructure and Thermal Conductivity of (Y_0.4Er_0.6)₃Al₅O₁₂ Ceramics Material for Thermal Barrier Coating

WANG Jun, WANG Xuanli(

), LIU Shuang, SONG Rui, SONG Xiwen

School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China

Cite this article:

WANG Jun, WANG Xuanli, LIU Shuang, SONG Rui, SONG Xiwen. Effect of Mn Doping on Microstructure and Thermal Conductivity of (Y_0.4Er_0.6)₃Al₅O₁₂ Ceramics Material for Thermal Barrier Coating. Chinese Journal of Materials Research, 2024, 38(6): 463-470.

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Abstract

Ceramic materials (Y_0.4Er_0.6)₃(Al_{1 -}_y Mn _y )₅O₁₂ (y = 0, 0.02, 0.04, 0.06, 0.08, 0.1) were prepared by solid phase synthesis method, and their microstructure and thermal conductivity were studied by X-ray diffractometer and Rietveld refinement method, X-ray photoelectron spectroscopy, scanning electron microscopy, X-ray energy spectroscopy, transmission electron microscopy, laser thermal conductivity tester. The results show that the ceramic materials of (Y_0.4Er_0.6)₃(Al_{1 -}_y Mn _y )₅O₁₂ are all single YAG phase, with the increase of Mn doping, the lattice constant and cell volume decrease and then increase, Mn²⁺ gradually occupies the position of Al³⁺ in the cell, keeping the crystal structure of Y₃Al₅O₁₂ unchanged; the thermal conductivity of the ceramic material (Y_0.4Er_0.6)₃(Al_{1 -}_y Mn _y )₅O₁₂ is significantly reduced, with the lowest thermal conductivity at Mn doping y = 0.06, which is about 1.38 W/(m·K) at 1100^oC, and reduced by about 34.6 % compared to that of the pure ceramic material YAG (2.1 W/(m·K)).

Key words: inorganic non-metallic materials thermal barrier coating yttrium aluminum garnet double-site doping microstructure thermal conductivity

Received: 23 August 2023

ZTFLH:

TQ174.1

Fund: National Natural Science Foundation of China(52372062);Basic Research Operating Expenses of Colleges and Universities Directly under the Inner Mongolia Autonomous Region(2023QNJS016);the Innovation Fund of Inner Mongolia University of Science and Technology(2019QDL-B03)

Corresponding Authors: WANG Xuanli, Tel: 15374723217, E-mail: wangxuanli917@163.com

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https://www.cjmr.org/EN/10.11901/1005.3093.2023.415 OR https://www.cjmr.org/EN/Y2024/V38/I6/463

Fig.1 XRD pattern (a) and local magnified image (b) of (Y_0.4Er_0.6)₃(Al_{1 -}_y Mn _y )₅O₁₂(y = 0, 0.02, 0.04, 0.06, 0.08, 0.1) ceramic materials

Fig.2 Rietveld refinement results of (Y_0.4Er_0.6)₃(Al_{1 -}_y Mn _y )₅O₁₂ ceramic materials (a) y = 0; (b) y = 0.02; (c) y = 0.04; (d) y = 0.06; (e) y = 0.08; (f) y = 0.1

Table 1 Structure parameters and refined data of (Y_0.4Er_0.6)₃(Al_{1 -}_y Mn _y )₅O₁₂ ceramic materials obtained by Rietveld refinement

Table 2 Refined structural parameters of the Rietveld fitting for the (Y_0.4Er_0.6)₃(Al_0.94Mn_0.06)₅O₁₂ceramic material

Fig.3 XPS full spectra of (Y_0.4Er_0.6)₃(Al_{1 -}_y Mn _y )₅O₁₂ ceramic materials with different doping contents (a) y = 0.02; (b) y = 0.04; (c) y = 0.06; (d) y = 0.08; (e) y = 0.1

Fig.4 Mn2p XPS fine spectra of (Y_0.4Er_0.6)₃(Al_{1 - y}Mn_y)₅O₁₂ceramic materials with different doping contents (a) y = 0.02; (b) y = 0.04; (c) y = 0.06; (d) y = 0.08; (e) y = 0.1

Fig.5 TEM and HRTEM images of (Y_0.4Er_0.6)₃(Al_0.94Mn_0.06)₅O₁₂ ceramic material

Fig.6 FESEM images of (Y_0.4Er_0.6)₃(Al_{1 -}_y Mn _y )₅O₁₂ ceramic materials with different doping contents (a) y = 0; (b) y = 0.02; (c) y = 0.04; (d) y = 0.06; (e) y = 0.08; (f) y = 0.1

Fig.7 EDS energy spectrum of (Y_0.4Er_0.6)₃(Al_0.94Mn_0.06)₅O₁₂ ceramic material

Table 3 Thermal diﬀusivity of (Y_0.4Er_0.6)₃(Al_{1 -}_y Mn _y )₅O₁₂ ceramics at diﬀerent temperatures (mm²/s)

Fig.8 Thermal conductivity of (Y_0.4Er_0.6)₃(Al_{1 -}_y Mn _y )₅O₁₂(y = 0, 0.02, 0.04, 0.06, 0.08, 0.1) ceramic materials

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