| 摘要 |
PURPOSE:To obtain a lightweight and heat resistant coating having superior heat insulation, thermal shock resistance, airtightness and mechanical strength by thermal spraying powder of a sublimable material such as a carbide, nitride or boride and oxide powder on the surface of a substrate to form a porous coating. CONSTITUTION:Powder of a carbide, nitride or boride sublimable readily during thermal spraying such as Si3N4, SiC or BN is mixed with powder of an oxide such as Al2O3 or stabilized ZrO2. This powdery mixture is thermally sprayed on the surface of a heat resistant alloy substrate to form a thermally sprayed porous layer. By this method, a lightweight and heat resistant coating having a long service life can be formed. |
