%0 Journal Article
%T Mechanism of current injection in the process of wire electrical explosion<br>丝电爆过程的电流导入机理
%A Bi Xue-Song
%A Zhu Liang
%A Yang Fu-Long
%A <br>毕学松
%A 朱亮
%A 杨富龙
%J 物理学报
%D 2012
%I 
%X In the process of nanopowder production by the wire electrical explosion, the ablation of electrodes and the formation of micron-size particles are directly influenced by the way the current is injected into the metal wire from the electrodes. Through the channels which are provided by the "contact" between the electrodes and the wire ends, as well as the "breakdown" between them, a series of experiments of electrical explosion is carried out. Results show that the photocurrent detected by photodiodes at the wire ends almost occurs simultaneously with the circuit discharge current, however it at the central section lags behind the circuit discharge current obviously. The initial explosion product of the wire ends is liquid, and that of the other parts of wire is gas. Those results indicate that when the current folows into the "contact", the phenomenon of gas discharge also occurs at the wire ends. Because the plasma provides another current path, the energy density of the wire ends is decreased. Hence, the wire ends cannot explode and form remainder on the electrodes. When the current flows into the "breakdown", the electrodes ablated is slightly obvious, and there was no remainder on the electrodes.
%K wire electrical explosion (wee)
%K gas discharge
%K illumination intensity
%K energy density<br>丝电爆
%K 气体放电
%K 光照度
%K 能量密度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=78F360FC29C47911BDA62321C71A272D&yid=99E9153A83D4CB11&vid=1D0FA33DA02ABACD&iid=DF92D298D3FF1E6E&sid=9B0219E5FDEF2891&eid=D990D2A4B3AC660C&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=23