Correlation between thermal stability and β relaxation of La-Ce-Al-Co-Ga bulk metallic glasses
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Summary
This summary is machine-generated.Improving the thermal stability of metallic glasses is crucial. This study reveals key correlations between beta relaxation processes and thermal stability, offering strategies to enhance glass performance.
Area Of Science
- Materials Science
- Condensed Matter Physics
Background
- Metallic glasses exhibit thermal instability, limiting their applications and processing.
- Enhancing thermal stability is a critical research area for metallic glasses.
Purpose Of The Study
- To investigate the relationship between beta relaxation and thermal stability in metallic glasses.
- To identify correlations between beta relaxation parameters and thermal properties like glass transition temperature and supercooled liquid region width.
Main Methods
- Studied a [(La0.7Ce0.3)65Al10Co25]100-xGax model system.
- Analyzed dynamic mechanical properties to probe relaxation processes.
- Correlated relaxation intensities, temperatures, and activation energies with thermal stability indicators.
Main Results
- Positive correlation found between the ratio of beta to alpha relaxation intensity (E″β/E″α) and glass transition temperature (Tg).
- Positive correlation observed between the ratio of beta to alpha relaxation temperature (Tβ/Tα) and the supercooled liquid region width (ΔTx).
- Negative correlation identified between ΔTx and beta relaxation activation energy (Eβ).
Conclusions
- Established three key relationships linking beta relaxation dynamics to the thermal stability of metallic glasses.
- Demonstrated that regulating beta relaxation is a viable strategy to enhance thermal stability.
- Findings deepen the understanding of factors governing glass stability and offer practical implications for material design.
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