不銹鋼用セラミックコーチングの接着に影響する諸因子の研究 : セラミックコーチングの研究 (第1報)

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The effect of firing conditions in the adherence of ceramic coating was studied experimentally. The nature of the interface between coating and base plate, determined by the stripping technique, and by microscopic observations, was found to be affected by firing conditions. The following changes in the nature of interface were observed:(1) At a lower firing temperature and for shorter period of firing, chromium oxide was formed, and the coating showed a good adherence.(2) At a higher firing temperature and for longer period of firing, chromium oxide disappeared, and a poor-adherent coating was obtained.Chromium and manganese, together with other elements which can migrate from the base metal into the coating, produced effects on the thermal expansion of the coating, whereas the mill addition of Cr2O3 and clay had only a slight influence. Such a mill addition raised the softening temperature.Practically all of the coatings on stainless steel were more or less in the state of biaxial compression at a room temperature, because of the very large difference between the expansion coefficients of coating and base plate.Current theories concerning the failure of ceramic coating under stress are discussed.
社団法人日本セラミックス協会の論文
1959-03-01