吨级工业化制备！我国可控核聚变关键材料取得重要进展

Core Insights - Significant progress has been made in the field of key materials for controllable nuclear fusion in China, with the successful development of the second-generation high-temperature superconducting tape core material, Hastelloy C276, marking a shift from reliance on imports [1][3] - The second-generation high-temperature superconducting tape is essential for constructing controllable nuclear fusion devices, often referred to as "artificial suns," as it generates the strong magnetic fields necessary to confine plasma at temperatures exceeding one hundred million degrees Celsius [3] Material Development - Researchers at the Institute of Metal Research, Chinese Academy of Sciences, achieved industrial-scale production of high-purity C276 alloy using a self-developed purification technology, producing it in ton-level quantities [3] - The team overcame technical challenges in processing ultra-thin and ultra-long tapes, successfully rolling the alloy into a tape with a thickness of only 0.046 mm, a width of 12 mm, and a length exceeding 2000 meters, with a surface smoothness of less than 20 nanometers [3] - The C276 material exhibits exceptional strength at liquid nitrogen temperatures, capable of supporting approximately 19 tons of weight over an area the size of a fingernail, and retains excellent performance even after high-temperature treatment [3] Application and Validation - The domestically produced C276 has been validated by multiple enterprises and has successfully been used to create high-temperature superconducting tapes that meet international performance standards, contributing to relevant domestic technology projects [3]