Latest News
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China Unveils Shenzhou-21 Crew for Space Station Mission
This undated photo shows Shenzhou-21 crew members Zhang Lu (C), Wu Fei (R) and Zhang Hongzhang. Chinese astronauts Zhang Lu, Wu Fei and Zhang Hongzhang will carry out the Shenzhou-21 crewed spaceflight mission, and Zhang Lu will be the commander, the China Manned Space Agency announced at a press conference on Thursday. (Xinhua)
Chinese astronauts Zhang Lu, Wu Fei and Zhang Hongzhang will carry out the Shenzhou-21 crewed spaceflight mission, and Zhang Lu will be the commander, the China Manned Space Agency announced at a press conference on Thursday.
The Shenzhou-21 crewed spaceship is scheduled to be launched at 11:44 p.m. Friday (Beijing Time) from the Jiuquan Satellite Launch Center in northwest China, said Zhang Jingbo, spokesperson of the agency.
The three astronauts are space pilot, flight engineer and payload specialist, respectively, representing the three types of Chinese astronauts in service, he added.
Zhang Lu was a crew member of the Shenzhou-15 mission. Wu Fei and Zhang Hongzhang, both from the third batch of Chinese astronauts, will carry out the spaceflight mission for the first time.
Before being selected as an astronaut, Wu Fei was an engineer at the China Academy of Space Technology under the China Aerospace Science and Technology Corporation, and Zhang Hongzhang was a researcher at the Dalian Institute of Chemical Physics under the Chinese Academy of Sciences.
This mission is the sixth manned flight mission since the space station entered the application and development phase, and the 37th flight of China's manned spaceflight program.
The Shenzhou-21 astronauts will complete in-orbit rotation with the Shenzhou-20 crew, and stay in the space station for about six months, according to the spokesperson.
The new crew will carry out work on space science and application, perform extravehicular activities and cargo handling, install space debris protection devices, deploy and recover extravehicular payloads and equipment. They will also participate in science education and public welfare activities, and conduct in-orbit experiments.
During their stay in orbit, the Shenzhou-21 crew will welcome the Tianzhou-10 cargo spacecraft and the Shenzhou-22 crewed spaceship.
The Shenzhou-20 crew will return to the Dongfeng landing site in north China's Inner Mongolia Autonomous Region after completing the in-orbit handover with the Shenzhou-21 crew, the spokesperson added. (Xinhua)
This undated photo shows Shenzhou-21 crew member Zhang Lu. Chinese astronauts Zhang Lu, Wu Fei and Zhang Hongzhang will carry out the Shenzhou-21 crewed spaceflight mission, and Zhang Lu will be the commander, the China Manned Space Agency announced at a press conference on Thursday. (Xinhua)
This undated photo shows Shenzhou-21 crew member Wu Fei. Chinese astronauts Zhang Lu, Wu Fei and Zhang Hongzhang will carry out the Shenzhou-21 crewed spaceflight mission, and Zhang Lu will be the commander, the China Manned Space Agency announced at a press conference on Thursday. (Xinhua)
This undated photo shows Shenzhou-21 crew member Zhang Hongzhang. Chinese astronauts Zhang Lu, Wu Fei and Zhang Hongzhang will carry out the Shenzhou-21 crewed spaceflight mission, and Zhang Lu will be the commander, the China Manned Space Agency announced at a press conference on Thursday. (Xinhua)
Source: Chinese Academy of Sciences
Editor: Gao Yuan
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Research News
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Chinese Scientists Uncover Diamond’s Electrical Failure Mechanism
A research team from the University of Chinese Academy of Sciences has revealed the failure mechanism of diamond under extreme electrical fields through in situ experiments and molecular dynamics simulations. The study, published in Cell Reports Physical Science, provides critical insights for the design of next-generation diamond-based high-power electronic devices.
Diamond is known for its exceptional physical properties, including ultra-high breakdown field strength and thermal conductivity, making it a promising material for high-frequency and high-power electronics. However, its failure process under extreme electrical fields has remained poorly understood—until now.
The team, led by Professors YAN Qingbo and CHEN Guangchao, used an in situ transmission electron microscopy (TEM) method to observe the breakdown process in real time. They found that diamond failure begins preferentially along the (111) crystal plane, driven by stress-induced lattice distortion and subsequent amorphization, rather than transforming into graphite.
The researchers also used molecular dynamics (MD) simulations to confirm that the (111) surface is more prone to thermal collapse under high temperatures, aligning perfectly with their experimental observations. This study not only clarifies the crystallographic dependency of diamond’s electrical failure but also suggests that using (100)- or (110)-oriented diamond exposed substrates could significantly enhance device durability.
This study not only deepens the understanding of diamond’s behavior under extreme conditions but also opens new pathways for more durable diamond-based electronic devices.
The team said that the findings are expected to influence the design and material selection of diamond-based devices in fields such as quantum computing, high-power transistors, and ultraviolet lasers.
Editor: GAO Yuan
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