OS08W0193 Sliding wear of silicon carbide and silicon carbide-graphite composite ceramics

Silicon carbide (SiC) ceramics have good wear resistance but poor friction properties under dry sliding conditions. To lower the friction of SiC, a novel porous carbon material called rice bran carbon (RBC) was added into SiC to make SiC/RBC composite ceramics. The SiC/RBC composites were prepared by mixing one of three kinds of RBC powders having different particle sizes and a fine SiC doped with Al4C3and B4C additives and sintering at 1600 °C for 5 min by a pulse electric current sintering (PECS) method. The mechanical and tribological properties of the SiC/RBC composites were evaluated and compared with those of monolithic SiC, monolithic RBC bulk material, and SiC/graphite composite. The SiC/RBC composites not only had superior fracture strength (3–4 times as high as that of the monolithic RBC material) but also showed low friction coefficients (around 0.25) and high wear resistance (at a level of 10−6mm3N−1m−1) when slid against a silicon carbide ceramic counterface during block-on-ring sliding tests under dry conditions. Compared with the conventional SiC/graphite composite, the SiC/RBC composites had higher mechanical strength, lower friction coefficients, and better wear resistance.

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Tribological Properties of Silicon Carbide and Silicon Carbide-Graphite Composite Ceramics in Sliding Contact

Journal of the American Ceramic Society ◽

10.1111/j.1151-2916.2003.tb03407.x ◽

2003 ◽

Vol 86 (6) ◽

pp. 991-1002 ◽

Cited By ~ 15

Author(s):

You Zhou ◽

Kiyoshi Hirao ◽

Yukihiko Yamauchi ◽

Shuzo Kanzaki

Keyword(s):

Silicon Carbide ◽

Tribological Properties ◽

Sliding Contact ◽

Composite Ceramics ◽

Graphite Composite

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Intelligent modelling and prediction of slotted-electrical discharge diamond grinding of aluminium-silicon carbide-graphite composite

International Journal of Abrasive Technology ◽

10.1504/ijat.2013.057329 ◽

2013 ◽

Vol 6 (2) ◽

pp. 93 ◽

Cited By ~ 2

Author(s):

Ravindra Nath Yadav ◽

Vinod Yadava

Keyword(s):

Silicon Carbide ◽

Electrical Discharge ◽

Graphite Composite ◽

Diamond Grinding

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Study on Properties of Carbon Particle Modified Silicon Carbide Composite Ceramics

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.311-313.276 ◽

2011 ◽

Vol 311-313 ◽

pp. 276-282 ◽

Cited By ~ 1

Author(s):

You Jun Lu ◽

Hong Fang Shen ◽

Yan Ming Wang

Keyword(s):

Silicon Carbide ◽

High Temperature ◽

Carbon Particle ◽

Composite Ceramics ◽

Carbon Particles ◽

High Temperature Mechanical Properties ◽

Sic Ceramics ◽

Carbide Composite ◽

Application Fields ◽

Different Content

High-temperature mechanical properties, machinability, oxidation resistance and thermal shock resistance of different content of carbon particles modified silicon carbide composite ceramics (Cp/SiC) prepared by pressureless sintering techniques were studied. Adhesion of Cp/SiC to melted glass under 1000°C was also observed. The results showed that 15-Cp/SiC had the optimum machinability and it also did not adhere to melted glass at high temperature. And flexural strength, hardness, and fracture toughness of 15-Cp/SiC is 136.5MPa, 274.6kgf/mm2, 2.58MPa•m1/2 respectively. The good performance of Cp/SiC made it possible to be used as high temperature glass fixture, which means that Cp/SiC can not only improve the service life of fixture materials, but also broaden the application fields of SiC ceramics.

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