金属钼栅极高温定型处理技术研究  

HEAT TREATMENT RESAERCH OF MOLYBDENUM-GRID

作　　者：郑茂繁[1] 黄永杰[1] 唐福俊[1] 张天平[1] 

机构地区：[1]兰州空间技术物理研究所真空技术与物理重点实验室,兰州730000

出　　处：《真空与低温》2015年第6期334-336,共3页Vacuum and Cryogenics

摘　　要：栅极组件是离子推力器的关键组件,其功能是引出并加速离子束流形成推力。栅极形状直接决定着栅极组件的性能和可靠稳定性。基于金属钼烧氢处理技术,对栅极形状、定型温度和保温时间以及定型处理程序进行优化试验研究,并确定金属钼栅极高温定型处理的方法和技术参数。通过对30 cm直径金属钼栅极的高温烧氢定型处理,结果表明:金属钼栅极高温烧氢定型处理程序和技术参数合理可行,定型处理的钼栅极形状轮廓度误差控制在0.1 mm以内,并将栅极组件栅间距的误差控制在0.1 mm以内,改善了栅极组件的性能和可靠性。Grid system is the key assembly of ion thruster,whose main function is to extract and accelerate ion to generate thrust. However,grid’ s geometry is the dominating factor for performance and stability. This paper elaborates the study of grids shape related to heat treatment temperature,duration and operation procedure based on molybdenum heat treatment process under hydrogen circumstance,and finds out the proper molybdenum grid heat treatment method and technical parameters. The heat treatment results of 30 cm molybdenum grids show that the method and technical pa-rameters are suitable for grid treatment,the grid profile deviation is under 0.1 mm,while gird gap tolerance is controlled within 0.1 mm which improves performance and reliability of grid assembly.

关 键 词：电推进 金属钼栅极 烧氢处理 高温定型 

分 类 号：V439.1[航空宇航科学与技术—航空宇航推进理论与工程]