時計外装におけるセラミックコーティング (1989年秋季講演会)

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タイトル別名
  • Ceramic Coating on the Exterior Parts of Clocks and Watches
  • 時計外装におけるセラミックコーティング
  • トケイ ガイソウ ニ オケル セラミック コーティング

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抄録

Ceramic coating techniques by means of dry coating process have been used widely, as the dry coating process is superior to the wet coating process in the color variation, wear-proof, hardness, and corrosion-resistance of the coated surface. However, it is not yet satis factory on the tone and color variation of the surface. In the present paper, some investigations are made in order to improve the tone and color variation on the exterior parts of clocks and watches. 1) Paying attention to the application of ceramic coating interferance film which has been little used so far, an investigation is made on the optimum thickness of the interferance film for brighter. tone and wider color variation, in order to put this to practical use. 2) Titanium nitride coating film formed by sputtering has a defect that the surface is rather dark in tone. To improve this tone, application of reactive sputtering with titanium and additional tantalum is tried. Conditions of the optimum quantity of the tantalum to be added are examined, in order to get brighter tone.

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