Rajkumar V.B. , Ajeet K. Srivastav , Peisheng Wang , Yong Du
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引用次数: 0
Abstract
This study delves into the phase transformations of fifteen pure elements utilizing a synergistic approach combining arc-melting, a pyrometer, and its temperature vs. time output. Employing cooling curve recording tactics during arc-melting with an elite temporal resolution pyrometer unravels double recalescence in refractory metals (‘Mo,’ ‘Nb,’ ‘Ta,’ ‘W’). Metalloids, including ’B,’ ’Si,’ and ’Ge,’ exhibit unique characteristics, with ’Si’ showcasing a gravity-defying protrusion along the temperature gradient. The pyrometer’s output for fcc (‘Ni,’ ‘Co’) and bcc (‘Hf,’ ‘Mo,’ etc.) primary solidifying phases is synonymous. Recalescence striations in the cooling graph depict a balance between factors favoring and impeding nucleation. In cases of ambiguous pyrometer signals, the implementation of an alternative approach enhances the quality of the temperature vs. time graph. In the future, a fresh contact method design concept in this study would address other pyrometer limitations, such as repeatability concerns and constant emissivity value usage in an entire experiment.
期刊介绍:
Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application.
The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta.
The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas:
- New and improved instrumentation and methods
- Thermal properties and behavior of materials
- Kinetics of thermally stimulated processes