Energy-releasing and phase transitions of Ti-based bulk metallic glass composites during heating
Source abstract
Abstract
The energy-releasing and phase transitions of Ti-based bulk metallic glass composites (BMGCs) during heating largely remain elusive. Here, the effects of cooling rates and compositional changes on energy-releasing and phase transitions of two BMGCs containing relatively stable β-Ti crystals or metastable β-Ti crystals are investigated. With decreasing the cooling rates, both BMGCs transform from non-equilibrium BMGCs to quasi-equilibrium BMGCs. Moreover, decreasing the Co content reduces the phase stability of β-Ti. DSC heating, isothermal ω-Ti precipitates in β-Ti crystals before T g, and as the temperature above T x, the glass matrix undergoes crystallization. With decreasing the cooling rates, both the relaxation and crystallization enthalpies decrease, but which can be significantly enhanced by decreasing the Co content, suggesting that BMGCs with unstable β-Ti dendrites are of better energy-releasing properties. These findings not only reveal the energy changes and phase transitions of BMGCs during heating, but also promote their practical applications as energy-releasing materials.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Metallic Glasses and Amorphous Alloys · Glass properties and applications · Phase-change materials and chalcogenides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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