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http://nopr.niscpr.res.in/handle/123456789/29851| Title: | Effect of superimposed square wave alternating current during electro crystallization of copper on copper single crystal planes |
| Authors: | Shyamsunder, K Sheshadri, B S |
| Issue Date: | Aug-1995 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The morphology of copper electrodeposits on copper single crystal planes is affected by superimposing a square wave alternating current (ac) on a direct current (dc). The effects of 'ac' are discussed from the morphological point of view and from the cathodic polarization studies. In the presence of superimposed 'ac' on the (111) plane, hexagonal and triangular pyramids observed in purified acid copper sulphate bath truncate and change to layers, then to a truncated triangular block and finally to polycrystalline type of deposit. Layer type of deposit observed on (100) plane transforms to truncated square pyramidal blocks and finally to polycrystalline deposit. On the (110) plane, ridges break up and give rise to a polycrystalline deposit. It was found that a superimposed 'ac' has a depolarizing effect. The mechanism of the deposition process is discussed. |
| Page(s): | 177-183 |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Appears in Collections: | IJEMS Vol.02(4) [August 1995] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJEMS 2(4) 177-183.pdf | 1.47 MB | Adobe PDF | View/Open |
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