Evaluation of Technological Capability to from Dielectric Coatings on AK6 Alloy, Using a Method of Microarc Oxidation

被引：5
作者：
Gutsalenko, Yu. G. [1 ]
Sevidova, E. K. [1 ]
Stepanova, I. I. [1 ]
机构：
[1] Natl Tech Univ Kharkiv Polytech Inst, UA-61002 Kharkov, Ukraine
来源：
SURFACE ENGINEERING AND APPLIED ELECTROCHEMISTRY | 2019年 / 55卷 / 05期
关键词：
microarc oxidation; dielectric properties; galvanostatic mode coatings;
D O I：
10.3103/S1068375519050041
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The dielectric properties of coatings on AK6 alloy formed with a microarc oxidation method in two electric modes in alkaline-silicate electrolytes are estimated. It is shown that both modes, a galvanostatic mode and an arbitrarily falling power mode in alternating current circuits, make it possible to obtain coatings with a thickness of 30-60 mu m, with sufficiently high electrophysical parameters: bulk specific resistance rho(v) = 3-9 x 10(9) omega m and dielectric strength E = 9-14 V/mu m. It is established that higher values of rho(v) and E in the both modes can be achieved in the solutions of 1 g/L KOH + 6 g/L of liquid glass (LG) and 12 g/L of LG. In terms of absolute value, the parameters of the coatings formed in the mode of arbitrarily falling power exceed the same characteristics of the oxide layers formed under conditions of galvanostatic mode by a factor of 1.5-2.5.
引用
收藏
页码：602 / 606
页数：5
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