Fracture properties of La(Fe,Mn,Si)13 magnetocaloric materials

Article Materials Science, Ceramics

Analysis of the crack propagation mechanism of multiple scratched glass-ceramics by an interference stress field prediction model and experiment

Xue Yang et al.

Summary: This study aims to investigate the effect of multi-scratch interference on crack propagation, material removal mode, and surface quality in glass-ceramics. By establishing a stress field model, the influence mechanism of interference on crack propagation in glass-ceramics was revealed, showing that interference promotes lateral crack propagation and brittle removal of the material. Multiple scratch experiments replicated interference effects caused by multiple grits, showing that lateral crack/brittle fracture is dominant in multi-scratch scenarios.

CERAMICS INTERNATIONAL (2022)

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Article Thermodynamics

Environment-assisted crack nucleation in La(Fe,Mn,Si)13 -based magnetocaloric materials

Siyang Wang et al.

Summary: Cracks mainly form around La-rich particles in La(Fe,Si)(13)-based magnetocaloric materials and pose a threat to their long-term structural integrity. A study suggests that the cracks are nucleated in the 1:13 phase adjacent to La-rich particles due to volume expansion and internal degradation caused by a chemical reaction between the La2O3 particles and water/moisture. It is therefore important to suppress the formation of La-rich particles or minimize their size during material processing to ensure the long-term structural integrity of La(Fe,Mn,Si)(13) magnetocaloric materials.

INTERNATIONAL JOURNAL OF REFRIGERATION (2022)

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Article Thermodynamics

LaFeSi-based magnetocaloric material analysis: Cyclic endurance and thermal performance results *

Sergiu Lionte et al.

Summary: This paper presents the optimization of LaFeSi-based alloys for magnetocaloric applications, including experimental results with specific layering of materials with different Curie temperatures. The potential of LaFeSi-based alloys to replace Gd-based alloys and increase cooling power while reducing costs is demonstrated through endurance testing.

INTERNATIONAL JOURNAL OF REFRIGERATION (2021)

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Article Materials Science, Multidisciplinary