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Containerless metal single-crystal growth via electromagnetic levitation
J P Witteveen1, M A B Vrielink1, R van Gastel2
1Physics of Interfaces and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
The Review of Scientific Instruments
|October 31, 2021
Summary
Researchers developed a novel electromagnetic levitation apparatus for containerless vacuum crystal growth. This method produces high-purity metal single-crystals, overcoming limitations of traditional techniques.
Area of Science:
- Materials Science
- Solid State Physics
- Crystallography
Background:
- Traditional methods like Czochralski and floating zone for elemental metal single-crystal growth are prone to contamination and defects.
- Containerless growth environments mitigate issues associated with crucible contact and thermal stress.
Purpose of the Study:
- To develop and demonstrate a novel crystal growth apparatus utilizing electromagnetic levitation in a vacuum.
- To achieve superior quality and purity in metal single-crystals through containerless growth.
Main Methods:
- Development of a novel apparatus employing electromagnetic levitation in a vacuum.
- Implementation of two growth modes: containerless undercooled crystallization and levitation-based Czochralski growth.
- Detailed description of the experimental setup, including coil design, sample handling, seed insertion, and real-time monitoring.
Main Results:
- Successful growth of high-quality copper single-crystals.
- Demonstration of the apparatus's capability for producing pure metal single-crystals.
- Validation of the containerless growth approach for overcoming traditional limitations.
Conclusions:
- Electromagnetic levitation in a vacuum offers a promising route for advanced metal single-crystal fabrication.
- The developed apparatus enables precise control over growth conditions, leading to enhanced crystal quality.
- This technology has the potential to advance materials science research and applications requiring high-purity single-crystals.
