超细晶/纳米晶钨——未来聚变堆面向等离子体材料  

Ultra-fine Grained/Nano-crystalline Tungsten—Plasma Facing Material for Future Fusion Reactors

作　　者：刘凤[1] 李强[1] 王万景[1] 罗广南[1] 刘伟[2] 

机构地区：[1]中科院等离子体物理研究所,合肥230031 [2]清华大学材料科学与工程系,北京100084

出　　处：《材料导报》2011年第19期43-48,71,共7页Materials Reports

基　　金：科技部国际热核聚变实验堆(ITER)计划专项(2009GB106005;2010GB109004;2010GB104005)

摘　　要：钨为未来高参数准稳态运行聚变堆最有前景的面向等离子体材料。超细晶/纳米晶结构有可能提高钨材料的热力学性能和抗粒子辐照性能,因而成为一个很有前途的研发方向。深度塑性变形和粉末冶金均已在制备超细晶/纳米晶钨方面开始了初步探索,深度塑性变形的等通道角挤压法因能制备致密度高、韧脆性能优异、大尺度的块体超细晶/纳米晶钨,极有可能在钨基面向等离子体材料制备方面取得突破。Tungsten is the most promising plasma facing material （PFM） for future fusion reactors operated under high parameter, quasi-steady states. Ultra-fine grained/nano-crystalline （UFG/NG） microstructure, probably due to improvements on the thermal-mechanical properties and the anti-irradiation performance of tungsten, is among the potential directions towards future tungsten PFM. State of preparing the UFG/NG tungsten grades by means of severe plastic deformation （SPD） and powder metallurgy manufacturing methods is introduced in detail. Equal channel angular pressing, one of the SPD methods, may be a possible breakthrough method in preparing high density, good thermal-mechanical properties, bulk UFG/NG tungsten PFM grades.

关 键 词：超细晶/纳米晶钨 深度塑性变形 粉末冶金 面向等离子体材料 聚变堆 

分 类 号：TG142.31[一般工业技术—材料科学与工程]