%0 Journal Article
%T Study on the electrical parameter variation during microarc oxidation of aluminium alloys<br>铝合金微弧氧化过程中电学参量的特性研究
%A 吴汉华
%A 龙北红
%A 吕宪义
%A 汪剑波
%A 金曾孙
%J 物理学报
%D 2005
%I 
%X The variation of electrical parameters during microarc oxidation(MAO) of aluminium alloys at constant voltage has been studied by means of a laboratory-made data acquisition system. Experimental results show that the variations of the cath odic and anodic current amplitude and effective working current in an electrical loop with the duration of treatment show obviously five stages, and the variati ons of dynamic positive resistance and the rate of change of resistance in coati ngs also show different stages, while the variations of dynamic negative resista nce and the rate of change of resistance with oxidation time are not evident. Du ring the MAO process, the dynamic positive resistance is always not equal to the negative resistance, and the former is generally greater than the latter in gen eral. Scanning electron microscopy analysis shows that the surface morphology of MAO coatings is macro-porous and its variations with treatment time are in ste ps.
%K aluminium alloy
%K microarc oxidation
%K electrical parameter
%K ceramic coating<br>铝合金，
%K 微弧氧化，
%K 电学参量，
%K 陶瓷膜
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=13EAA74A5920883D&yid=2DD7160C83D0ACED&vid=318E4CC20AED4940&iid=E158A972A605785F&sid=A87AC493625B15AF&eid=E8EA62718B1C7FA9&journal_id=1000-3290&journal_name=物理学报&referenced_num=7&reference_num=15