field emission gun meaning in English

场发射电子枪
场发射电子象

Field emission gun
场发射电子枪
The corrosion behavior of nanocrystalline ( nc ) copper bulks with various grain sizes prepared from igc ( inert gas condemsation ) and vacuum annealing in comparison with conventional microcrystalline ( mc ) copper ( as - rolled and electrolytic ) in acid copper sulphate solution and neutral solution containing chlorides under free corrosion conditions and anodic polarizations has been studied using potentiodynamic polarization , potentiometric analysis , cyclic voltammetry and electrochemical impedance spectroscopy . x - ray diffraction was used to estimate the grain size of the annealed nc copper . field emission gun scanning electron microscopy and x - ray energy - dispersive spectroscopy was used to characterize the surface morphology and analyze the surface composition after the polarization and potentiometric test of both nc and mc copper
本文研究了用igc (惰性气体蒸发凝聚原位温压法)制备并真空退火到不同晶粒尺寸的纳米晶铜和微米晶铜(冷轧紫铜、电解铜)在酸性硫酸铜溶液和中性含氯溶液中，在自腐蚀状态和阳极极化状态下的腐蚀性能。使用了动电势极化、电位测定、循环伏安法( cv )和电化学阻抗谱( eis )等方法。 x -射线衍射( xrd )的方法用来估算纳米晶铜晶粒尺寸。