Effect of temperature on morphology and wear of a Cu-Ti-TiC MMC sintered by abnormal glow discharge

摘要: Microstructure and tribological properties had been studied in a Cu-Ti-1%TiC MMC with titanium concentration of 10%, 15%, 20%. The composite was manufactured following the pulvimetallurgical route that included: mechanical ultrasonic mixing 2-propanol, compaction at 400 MPa sintering assisted by abnormal glow discharge an atmosphere 10% nitrogen 90% argon. established direct current regime voltage values were adjusted according to temperatures 750°C 850°C. process carried out for 30 minutes then cooled same atmosphere. As result, differentiated morphology wear obtained sintered parts. At microstructure characterized stability Ti grains intermetallic precipitates such as CuTi2 CuTi observed interface matrix. On other hand, phases Cu3Ti, Cu4Ti detected These related diffusive processes occurred during sintering, enhanced energy provided process. It increase content improvement properties. In contents 20% estimated coefficient 2.7x10-8 mm3.N-1.m-1 track width 312 μm. Despite pores originated 850°C found value 2.4x10-8 size 778 μm, plastic deformation exerted on porous structures reached Results analysis lead this compound may be applicable fields where balance between adequate lightness are highly required automotive, aeronautical biomedical industries.