1、锌晶须
舞蹈比赛锌晶须(锌须):镀锌零件表面的须状结晶现象。
Zinc whiskers: are tiny hair-like filaments of zinc that actually grow from certain zinc-coated metal surfaces.
Size: 通常长几毫米,直径几微米。
Length:Up to 15mm,typically <1mm
Diameter:0.006-10µm, typically ~1 µm
zinc whiskers can be extremely difficult to e without magnification and proper illumination. 肉眼不易观察发现。
不仅锌存在须状结晶问题,锑,钙,金,铟,锡等金属都存在此问题。
梦到和男朋友分手2、现象
常见于:机房地板
但不仅限于地板
查理九世读后感
打的英语
竭尽心力
关于美的句子
3、危害
如果IT设备吸入锌晶须,电压高于25V的电路中可能会出现短路,电弧,信号紊乱或者灾难性故障。
是否影响健康:目前无相关报告。
4Why Are Tin, Zinc, Cadmium Still Ud? 为什么锡、锌、钙仍被使用?
•Not all Tin (or Zinc or Cadmium) surfaces whisker! – Rough estimate: 3% to 30% do whisker.
•Not all metal whiskers cau shorts – Environment (geometry and electrical potentials matter). – Rough estimate: 3% to 30% do short.
•Not all whisker-induced shorts are traced to whiskers俞峥
– They are very hard to e and failure analysis techniques often destroy evidence
藤野先生教案
– Rough estimate: 0% to 10% are correctly traced.