摘要
介绍了钨用作核聚变面对等离子体材料的制备技术以及钨材料的微观结构以及基本性能,包括真空/大气等离子体喷涂钨涂层,超高压电阻烧结技术制备W/Cu梯度材料,粉末冶金TiC、La_2O_3弥散增强钨合金材料。研究发现,钨涂层柱状晶结构能有效地增强整体系统传热,涂层气孔率7.4%、与基体结合良好、热导率80 W/(m·K),能够承受10 MW/m^2的稳态热负荷;5层W/Cu梯度材料无裂纹、孔洞等缺陷存在,表现出优异的热力学性能;La_2O_3和TiC在钨合金中起到"钉扎"作用,大大改善了钨材料晶界力较小,脆性等缺点,提高了冶金材料的性能。
In this paper,the fabricating technology of tungstsen plasma facing material,such as plasma spraying technology,powder metallurgy with dispersed TiC or La2O3,and resistance sintering under ultra-high pressure and as well as the micro-structure and main performances of tungsten plasma facing materials were introduced.The results indicated that the columnar crystals can enhance the heat transfer capacity,with the low porosity of7.4%and the thermal conductivity of80W/(m·K),and tungsten coating can withstand the heat flux of10MW/m2.No crack or hole appeared on the cross section and surface of five layered W/Cu gradient composites,exhibiting excellent thermodynamic properties.Both of TiC and La2O3particles can enhance the strength of tungsten because of pinning effect.The low grain boundary force and brittleness of tungsten plasma facing materials have been greatly desreased,and the properties of tungsten alloys have been improved.
作者
种法力
周张建
陈俊凌
陈勇
于福文
CHONG Fali;ZHOU Zhangjian;CHEN Junling;CHEN Yong;YU Fuwen(Xuzhou University of Technology, Xuzhou 221000, China;University of Science and technology Beijing, Beijing 100083, China;Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China;Hefei University of Technology, Hefei 230009,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2018年第3期3109-3112,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(11205130)
江苏省青蓝工程中青年学术带头人资助项目(02312064)
