| 摘要 |
PURPOSE:To realize manufacture of a substrate which assures relative density of 99.5% or more, almost does not allow existence of pores at the surface and has excellent friction resistance and sliding characteristic by sintering stabilized zirconia by the hot press method. CONSTITUTION:A mixture formed by adding aluminum oxide (Al2O3) of 1- 10wt% as the assisting agent for sintering to the main component consisting of zirconium oxide (ZrO2) of 80-94mol% and yttrium oxide (Y2O3) of 6-20mol% is hot pressed at a temperature of 1,400-1,600 deg.C. Thereby, a substrate is formed by the mixed organ of tetragonal and cubic system crystals or single organ of cubic system crystal. The stabilized zirconia having a high density is particularly excellent for sliding characteristic. The relative density of 99.5% or more can be obtained and pores on the surface can be eliminated almost perfectly from the surface by sintering the zirconia with the hot press method. The stabilized zirconia can be used for a long period of time and it shows more excellent characteristic as Y2O3 increases with proportional relationship. |
