Calcium phosphate coating on titanium substrate by electrodeposition
碩士 === 國立成功大學 === 材料科學(工程)學系 === 84 === AbstractThe calcium phosphate was deposited on titanium substrate by using electrolytic mixture of Ca(NO3)2（0.042M） and NH4H2PO4（0.025M） solutions with DC power supply. The cathode and anode were titanium substrate...
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
1996
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| Online Access: | http://ndltd.ncl.edu.tw/handle/18857653734114499372 |
| Summary: | 碩士 === 國立成功大學 === 材料科學(工程)學系 === 84 === AbstractThe calcium phosphate was deposited on titanium
substrate by using electrolytic mixture of Ca(NO3)2（0.042M）
and NH4H2PO4（0.025M） solutions with DC power supply. The
cathode and anode were titanium substrate and platinum
respectively. Various ratios of alcohol were added to increase
the resistance of electrolyte and improve the quality of calcium
phosphate coating.The result shows that the most uniform coating
is obtained by adding 50％ ethylene alcohol in the solution and
the power voltage and temperature of electrolyte are maintained
at 20V and 40℃ respectively. Thick layer of 800um can be
obtained for 3 hours deposition.The adhesion of calcium
phosphate coating on the titanium substrate can be improved by
post-treating in the electrolyte of similar composition without
ethylene alcohol addition. The 3MPa adhesive strength is
achieved for 120 hours post-treatment. The improvement of
adhesion for calcium phosphate coating on titanium is performed
by densifying the film from the outside surface to the interface
of the coating.The calcium hydroxide appearing in the coatings
can be dissolved in boiling water for 4 hours. The micrographs
of the boiled sample indicated uniform distribution of calcium
hydroxide in the coating.
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