Densification of Al2O3-SiC nanocomposites by densification of specimen surface layer by sintering atmosphere and sinter plus HIP process using it

摘要

The present invention relates to a method of sintering a sinter plus hot isostatic press (sinter plus HIP)₂O₃-SiC /RTI nanocomposite (nano-composite).;Al (Al) particles obtained by micronizing raw material powder₂O₃-SiC composite material is a single-phase Al₂O₃But it is very difficult to densify. Therefore, a hot press or a high-temperature atmospheric pressure sintering method is used. However, since both sintering methods have various problems to be applied to product production, sinter plus HIP process is considered to be an optimum sintering method for production of high temperature structural ceramics composite materials. However, in this case, the precondition is that the pores of the psalm must be discarded. SUMMARY OF THE INVENTION [₂O₃In order to densify the SiC nanocomposites, only the surface of the specimen can be densified at low sintering temperature by using nitrogen and hydrogen atmosphere in the sintering process, and all the pores in the specimen are discarded and hot isostatic pressing is performed. Sintering furnace to achieve complete densification.;The present invention relates to a method for manufacturing ceramics using a sinter plus HIP process which is most reliable for densification of ceramic materials,₂O₃-SiC nanocomposite material is completely densified. For this purpose, by inventing the sintering process to be performed at a low sintering temperature, the application range of the material is widened and the effect of facilitating the production is obtained.