Realizing mechanical property improvement and coloration in Si3N4 ceramics by rare earth-doping

Liu, Ning; Hu, Tengfei; Li, Zhe; Zhang, Jingxian; Duan, Yusen; Wang, Zhen; Dong, Shaoming

doi:10.1016/j.ceramint.2024.01.398

Ceramics International

2024

DOI: 10.1016/j.ceramint.2024.01.398

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Realizing mechanical property improvement and coloration in Si3N4 ceramics by rare earth-doping

Ning Liu,

Tengfei Hu,

Zhe Li

et al.

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Developing High‐Performance Ceramics from Multicomponent Grain Boundary Entropy Design

Han,

Ren,

Zhang

et al. 2024

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Grain boundary (GB) glassy phase often results in poor ceramic performances. Here, a Multicomponent Grain Boundary Entropy (MGBE) descriptor extracted from high‐throughput first‐principle calculations is proposed to capture the nature of high‐entropy GB phases in ceramics. In a Si3N4 ceramic model system, MGBE is found to have a direct correlation with GB phase crystallinity, element segregation, and formation of pores. The predicted highest MGBE sintering additive combination (MgO‐Y2O3‐Er2O3‐Yb2O3) leads to high‐performance ceramics of homogenous microstructure and pure GB (YErYb)2Si3O3N4 phase without observable glassy film. Conversely, low MGBE additives result in a substantial amount of GB glassy phase, element segregation, and pore clusters. The MGBE descriptor can make a rapid screening of multicomponent sintering additives, offering a novel approach for rational designing of ceramics with targeted microstructure and performances.

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Developing High‐Performance Ceramics from Multicomponent Grain Boundary Entropy Design

Han,

Ren,

Zhang

et al. 2024

Small

View full text Add to dashboard Cite

show abstract

Bionic structural design and model calculation for high toughness Si3N4/BN fibrous monolithic ceramic: A strategy from the fibrous cell and interface

Dong,

Yuan zhang,

Guan

et al. 2024

Ceramics International

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Realizing mechanical property improvement and coloration in Si3N4 ceramics by rare earth-doping

Cited by 2 publications

References 45 publications

Developing High‐Performance Ceramics from Multicomponent Grain Boundary Entropy Design

Developing High‐Performance Ceramics from Multicomponent Grain Boundary Entropy Design

Bionic structural design and model calculation for high toughness Si3N4/BN fibrous monolithic ceramic: A strategy from the fibrous cell and interface

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