Institute of Modern Physics, researchers at the Chinese Academy of Sciences and Huizhou University have made major breakthroughs in the performance of high -temperature superconducting (HTS) materials during welding connection. These HTS materials are called rare carbonate oxidant coating conductors. Even in a strong magnetic field, a large amount of current can be carried, and the energy loss is the least. However, for large projects, such as cables or scientific equipment, multiple materials need to be welded together. This published in the magazine of Materials has studied how these welding joints are maintained under mechanical characteristics and mechanical behavior.
Professor Mingzhi Guan cooperated with Tianfa Liao, Dr. WenYuan Wang and Dr. Zhiming Chen to explore the length of the solder and how the thickness of the welded material affects its strength and performance. Professor Guan said: “The behavior of understanding these joints is more durable and effective in actual applications.”
For research, researchers use a detailed computer model that simulates the performance of these joints in reality. This model helps them analyze how the different layers and solder of carbonate oxide materials of carbonate cope with the pressure. It shows that using thinner welds with shorter welds can reduce the connection more firmly by reducing the pressure of normal damaged areas. Professor Guan explained: “One of our main findings is that shorter welds and shorter joints can help prevent early failures.”
The study shows that the edges of the welded joint are particularly fragile. Pressure tendency is concentrated on these points, making it more likely to break or break. By shortening overlap and using thin welds, the researchers found that the pressure spread evenly, thereby reducing the risk of early damage. This is very important because when the joint is suffering too much pressure, it loses the ability to carry as much current as possible, which is a key factor in superconducting materials.
Researchers also compared two common methods of making these joints: face -to -face and back. Although the face -to -face method is usually preferred, because it reduces resistance, the back -to -back configuration is proven to be stronger in terms of processing physical pressure. Although the face -to -face method can better transmit electricity, the back -to -back method may improve its durability. Professor Guan said: “This has opened up new possibilities for designing high -efficiency and more long -lasting superconducting equipment.”
These discoveries have a practical impact on the industry’s superconductors on the industry. Rare earth-carbonate oxidation conductors are more and more used for magnetic energy storage, MRI machines and high-power cables, which require long materials. Because the tapes used in these superconductors are not long enough, they need to be welded together, which may have weaknesses. Professor Guan added: “Our research provides guidelines for more powerful and reliable joints, which may extend the life of superconducting equipment.”
In short, the study of Guan and his colleagues provides a method of predicting the performance of these joints under actual conditions. The results show that by using short connections, thinner solder, and back -to -back methods, the reliability and performance of the superconducting system can be greatly improved. This study is a key step that makes high -temperature superconductors more practical in various industries that depend on cutting -edge technology.
Journal reference
Liao, T., Wang, W., Chen, Z. , & Guan, m. (2024). “Research on the mechanical behavior and electromechanical characteristics of welding REBCO coating conductors.” Materials, 17 (2517). Doi: https: //doi.org/10.3390/MA17112517
About the author
Mingzhi guan It is a researcher at the CAS Institute of Modern Physics. He is considered an outstanding youth plan, CAS, an important talent in Ganxi Province. Professor Guan received a PhD in Lanzhou University in 2012.
He focuses on multiple coupling mechanics and superconducting mechanics in extreme environments. His research has led to more than 80 published academic papers (three of which have won the best paper awards and outstanding display papers for international journals), 10 of which are the national invention patents (4 of which have been successfully commercialized). He has developed extreme complete superconductive measurement and control devices, which has been provided to seven research institutions. He won various prestigious awards, including the first prize of MOE’s technology invention (2019), and won the second place in the technical progress of the Chinese Electronic Technology Society (2021). He won the second place. , The Western Youth Award of the Chinese Academy of Sciences, the follow -up of the Youth Innovation Promotion Association.
