Influence of high sintering pressure on the microhardness and wear resistance of diamond powder and silicon carbide-based composites

Materials Research

Oleksandr Sergueevitch Osipov¹  Ana Lucia Diegues Skury¹  Guerold Sergueevitch Bobrovnitchii¹ 

[1] ,Universidade Estadual do Norte Fluminense Laboratory of Advanced Materials Rio de Janeiro RJ ,Brazil

关键词: diamond powder;    sintering;    silicon carbide;    composite;   

DOI  :  10.1590/S1516-14392004000200019

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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