Process for obtaining by sintering of ceramic components of atmospheric sobpressu00e3o u00e0base silu00eccio carbide (SIC) with an additive of rare earth u00ectrio comcarbonato

摘要

Process for obtaining by sintering of ceramic components of atmospheric sobpressu00e3o u00e0base silu00eccio carbide (SIC) added comcarbonato of u00ectrio and rare earths. A process for obtaining patent deinvenu00e7u00e3o by sintering sobpressu00e3o atimosfu00e9rica of ceramic components based decarbeto silicon (SIC) added with yttrium carbonate and terrasraras.The production of ceramic components starts with umaetapa milling / homogenization of compositions by viau00famida in ball mill.After step demoagem / homogenization, the compositions are compacted emmatrizes steel, with shirt floating, with load decompactau00e7u00e3o between 20 and 50 MPa.Then, the bodies of provasu00e3o subjected to isostatic pressing under the cold pressu00e3oentre 200 and 400 MPa.Finally, the bodies of evidence are densificadospor two routes of sintering under atmospheric pressure, utilizandouma atmosphere of argon or nitrogen.Within a range detemperatura between 1600 and 2100 198 C, with a plateau between 30 E120 minutes, making a plateau in warming between 1400 a1700 198 C for 30 minutes.