| 摘要 |
PURPOSE:To allow all grains to adhere, in a state having molten parts around them, to the surface to be thermally sprayed at the time of explosion thermal spraying, by adding and binding a low-m.p. fine-grain oxide to stabilized zirconia. CONSTITUTION:A fine-grain oxide having a m.p. lower than that of stabilized zirconia is added and bound to stabilized zirconia. It is desirable that fine-grain oxide is a mixture of one or more kinds among alumina, silica, and titania each having a grain size smaller than that of stabilized zirconia. Moreover, the amount of the fine-grain oxide to be added is regulated to about 1-10wt.% based on the thermal spraying material after addition and the fine-grain oxide is bound to the stabilized zirconia by means of sintering, etc. When this thermal spraying material is thermally sprayed by an explosion thermal spraying method, the thermal spraying material reaches the surface to be thermally sprayed in a molten state or at least in a state where the fine-grain oxide is melted so that it covers the stabilized zirconia. Accordingly, a thermally sprayed film having high cross-sectional hardness and reduced in cross-sectional porosity can be formed. |
