Influence of high sintering pressure on the microhardness and wear resistance of diamond powder and silicon carbide-based composites
AUTOR(ES)
Osipov, Oleksandr Sergueevitch, Skury, Ana Lucia Diegues, Bobrovnitchii, Guerold Sergueevitch
FONTE
Materials Research
DATA DE PUBLICAÇÃO
2004-06
RESUMO
The work reported on here involved the development of several samples of "diamond-SiC" composite produced under sintering pressures of up to 9.0 GPa at temperatures of up to 1973 7K. The average size of the diamond micropowder crystals used was 40/28 µm. The sintering process was carried out in a 2500-ton hydraulic press equipped with an anvil-type high-pressure device having a toroidal work surface and a central concavity diameter of 20 mm. The microhardness and wear resistance of the samples were found to be dependent on the sintering pressure. The experimental results indicated that the maximum microhardness and minimum wear resistance coefficients of each compact were attained when the pressure applied during sintering exceeded 6.5 GPa. Based on the established values of pressure, this study served to identify the types of devices applicable for the manufacture of composite material inserts for a variety of rock drilling applications.
Documentos Relacionados
- Densification studies of silicon carbide-based ceramics with yttria, silica and alumina as sintering additives
- Microstructural Characterization and Influence of Ceramography Method on the Microhardness of Sintering Agents Added Silicon Carbide
- Titanium impurities in silicon, diamond, and silicon carbide
- Corrosion Investigation of Stir Cast Zn-27Al Based Hybrid Composites Reinforced with Quarry Dust and Silicon Carbide Particles
- New catalysts based on silicon carbide support for improvements in the sulfur recovery. Silicon carbide as support for the selective H2S oxidation