3D打印产品的超导性能
文章来源:未知 文章作者:enread 发布时间:2016-07-19 07:56 字体: [ ]  进入论坛
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3D printing is revolutionizing many areas of manufacturing and science. In particular, 3-D printing of metals has found novel applications in fields as diverse as customized medical implants1, jet engine bearings and rapid prototyping for the automotive industry. While many techniques can be used for 3-D printing with metals, most rely on computer-controlled melting or sintering of a metal alloy2 powder by a laser or electron beam. The mechanical properties of parts produced by this method have been well studied, but not enough attention has focused on their electrical properties.
 
Now in a paper appearing this week on the cover of the journal Applied3 Physics Letters, from AIP Publishing, a team of University of Melbourne and University of Western Australia researchers report creating a resonant4 microwave cavity that they 3-D printed via an aluminum5-silicon alloy (Al-12Si). It exhibits superconductivity when cooled below the critical temperature of aluminum (1.2 Kelvin). 
 
"Conductivity is a measure of how easily an electrical current flows through a material, while 'superconductivity' is this measure taken to its extreme," explained Professor Michael Tobar, University of Western Australia node director of the Center for Engineered Quantum Systems. "It's an effect observed within a number of materials, characterized by the complete vanishing of any resistance to the flow of electrical current when cooled below a certain temperature."
 
Superconducting cavities are useful for numerous areas of physics -- from quantum physics to particle accelerators. But designing superconducting cavities is becoming more complex, often involving nonstandard geometries and arrays of resonators, which makes conventional machining more challenging. 
 
So two groups at the University of Western Australia -- one led by Professor Tim Sercombe, an expert in materials and 3-D printing, and the other led by Tobar, an expert in engineered quantum systems and novel cavity designs -- combined their expertise6 and launched a pilot study to explore the superconducting properties of 3-D printed parts. 
 
"The physics of superconductivity is well understood, and it has been known for decades that aluminum exhibits superconductivity," Tobar said. "But the 3-D printing process relies on aluminum that's far from pure and it undergoes several processes -- atomization, laser melting, furnace annealing, etc. So we wanted to explore whether a range of known superconducting metals could successfully be 3-D printed and retain their desirable electrical property."


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1 implants c10b91e33a66c4b5cba3b091fcdfe0ac     
n.(植入身体中的)移植物( implant的名词复数 )
参考例句:
  • Hormone implants are used as growth boosters. 激素植入物被用作生长辅助剂。 来自《简明英汉词典》
  • Perhaps the most far-reaching project is an initiative called Living Implants From Engineering (LIFE). 也许最具深远意义的项目,是刚刚启动的建造活体移植工程 (LIFE)。 来自英汉非文学 - 生命科学 - 医学的第四次革命
2 alloy fLryq     
n.合金,(金属的)成色
参考例句:
  • The company produces titanium alloy.该公司生产钛合金。
  • Bronze is an alloy of copper and tin.青铜是铜和锡的合金。
3 applied Tz2zXA     
adj.应用的;v.应用,适用
参考例句:
  • She plans to take a course in applied linguistics.她打算学习应用语言学课程。
  • This cream is best applied to the face at night.这种乳霜最好晚上擦脸用。
4 resonant TBCzC     
adj.(声音)洪亮的,共鸣的
参考例句:
  • She has a resonant voice.她的嗓子真亮。
  • He responded with a resonant laugh.他报以洪亮的笑声。
5 aluminum 9xhzP     
n.(aluminium)铝
参考例句:
  • The aluminum sheets cannot be too much thicker than 0.04 inches.铝板厚度不能超过0.04英寸。
  • During the launch phase,it would ride in a protective aluminum shell.在发射阶段,它盛在一只保护的铝壳里。
6 expertise fmTx0     
n.专门知识(或技能等),专长
参考例句:
  • We were amazed at his expertise on the ski slopes.他斜坡滑雪的技能使我们赞叹不已。
  • You really have the technical expertise in a new breakthrough.让你真正在专业技术上有一个全新的突破。
TAG标签: 3D metal printing
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