Lattice engineering via large-radius cation doping: A novel strategy for CMAS-resistant high-entropy (Nd0.2Y0.2Er0.2Yb0.2Lu0.2)2SiO5

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2026-07-01 Epub Date: 2026-01-27 DOI:10.1016/j.jeurceramsoc.2026.118178

Qicheng Li , Xiufang Cui , Zhuo Chen , Zhijia Zhang , Yuqi Dong , Shinan Hu , Shitong Chen , Tong Shang , Yongchao Fang , Guo Jin

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引用次数: 0

Abstract

Three high-entropy silicates were synthesized: (Y_0.25Er_0.25Yb_0.25Lu_0.25)₂SiO₅ (4HE), (Nd_0.2Y_0.2Er_0.2Yb_0.2Lu_0.2)₂SiO₅ (NdHE), and (La_0.2Y_0.2Er_0.2Yb_0.2Lu_0.2)₂SiO₅ (LaHE)，with systematic analysis of size disorder effects on crystal structure and phase composition. Using Y₂SiO₅ as a control, the corrosion resistance of these rare earth silicates was compared, and the influence of La^3 + and Nd³⁺ doping on CMAS corrosion was analyzed. The research results demonstrate that La doping induces the formation of 7.51 wt% X1 phase due to high size disorder (δ = 0.0854), whereas NdHE maintains a nearly single-phase X2-type structure. NdHE exhibits the optimal CMAS corrosion resistance in isothermal CMAS corrosion experiments conducted at both 1400 ℃ and 1500 ℃. This is attributed to Nd³⁺ doping accelerating the precipitation of apatite-phase corrosion products and altering their growth orientation, thereby enabling rapid formation of a continuous, dense corrosion layer at the melt-substrate interface, which effectively impedes further rapid penetration of CMAS.

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大半径阳离子掺杂晶格工程：抗cmas高熵（Nd0.2Y0.2Er0.2Yb0.2Lu0.2）2SiO5的新策略

合成了（Y0.25Er0.25Yb0.25Lu0.25）2SiO5 （4HE）、（Nd0.2Y0.2Er0.2Yb0.2Lu0.2）2SiO5 （NdHE）和（La0.2Y0.2Er0.2Yb0.2Lu0.2）2SiO5 （LaHE）三种高熵硅酸盐，并系统分析了尺寸无序对晶体结构和相组成的影响。以Y2SiO5为对照，比较了这些稀土硅酸盐的耐蚀性，分析了La3 +和Nd3+掺杂对CMAS腐蚀的影响。研究结果表明，La掺杂由于高尺寸无序性（δ = 0.0854），形成了7.51 wt% X1相，而NdHE则保持了接近单相的x2型结构。在1400℃和1500℃的CMAS等温腐蚀实验中，NdHE均表现出最佳的抗CMAS腐蚀性能。这是由于Nd3+的掺杂加速了磷灰石相腐蚀产物的析出，改变了它们的生长方向，从而在熔体-衬底界面快速形成连续致密的腐蚀层，有效地阻碍了CMAS的进一步快速渗透。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.