文献类型：期刊文献

英文题名：Effect of heterogeneous phases on thermal-mechanical properties and CMAS corrosion resistance of (Sc0.33 Er0.33 Yb0.34 ) 2 Si2 O7 ceramics

作者：Li, Kaibin[1];Wang, Weize[1,2];Liu, Wei[1];Yang, Shilong[1];Liu, Yangguang[1];Yang, Ting[1];Wang, Changliang[3];Du, Xiuxin[3]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Shanghai Inst Aircraft Mech & Control, Shanghai 200092, Peoples R China;[3]AECC Beijing Inst Aeronaut Mat, Aviat Key Lab Sci & Technol Adv Corros & Protect A, Beijing 100095, Peoples R China

年份：2025

卷号：45

期号：2

外文期刊名：JOURNAL OF THE EUROPEAN CERAMIC SOCIETY

收录：;EI(收录号：20243616996939);WOS:【SCI-EXPANDED(收录号:WOS:001307793300001)】；

基金：This research was funded by the National High Technology Research and Development Program, China (2023YFB3711200) , National Natural Science Foundation, China (52175136, 52130511) , Science Center for Gas Turbine Projec, China (P2021-A-IV-002) , Shanghai Joint Innovation Program in the Field of Commercial Aviation Engines, China, Shanghai Gaofeng Project for University Academic Program Development, China, and Key Research and Development Projects in Anhui Province, China (No. 2022a05020004) .

语种：英文

外文关键词：Thermal insulation and environmental barrier; coatings (TEBCs); Rare-earth disilicates; Thermal-mechanical properties; Calcium-magnesium-alumina-silicate (CMAS)

摘要：To investigate the effect of heterogeneous phases on the thermal-mechanical properties and calcium-magnesium- aluminum-silicate (CMAS) corrosion resistance of multi-component disilicate ceramics, four different compositions of (Sc 0.33 Er 0.33 Yb 0.34 ) 2 Si 2 O 7 ceramics were prepared using the solid-phase reaction method with different rare-earth to silicon molar ratios in the raw materials. The (Sc 0.33 Er 0.33 Yb 0.34 ) 2 Si 2 O 7 ceramics containing (Sc 0.33 Er 0.33 Yb 0.34 ) 2 SiO 5 heterogeneous phases showed lower thermal conductivity and hardness but higher bulk ceramic densification, stability of grains at high-temperature, thermal expansion coefficients, and Young's modulus. However, the (Sc 0.33 Er 0.33 Yb 0.34 ) 2 Si 2 O 7 ceramics with SiO2 2 heterogeneous phases exhibited lower thermal expansion coefficients, hardness, and Young's modulus but higher densification, stability of grains, and thermal conductivity. Furthermore, the ceramics containing SiO2 2 heterogeneous phases showed better resistance to CMAS corrosion, which isolated CMAS melts effectively from the surface. Compared to Yb2Si2O7, 2 Si 2 O 7 , (Sc 0.33 Er 0.33 Yb 0.34 ) 2 Si 2 O 7 exhibits lower thermal conductivity and superior resistance to CMAS corrosion, making it a promising candidate material for multifunctional thermal insulation and environmental barrier coatings (TEBCs).