Tribological characteristics of SiC ceramics sintered with a small amount of yttria

Tribological Behavior of Silicon Carbide Ceramics - A Review

“…2) Wear mechanisms changed from surface grooving and micro-cracking at lower load (1 N) to dominant tribochemical wear at higher (6 or 13 N) load for all the ceramics. In other study, 84) sliding wear behavior of SiC ceramics sintered with (0.2 wt.% or 3 wt.%) Y 2 O 3 additive, microcracks induced fracture and pull-out were found responsible for the material removal.…”

“…SiC ceramics sintered with small amount (0.2 wt%) of Y 2 O 3 additives attributed to high strength (561 MPa) and high hardness (27.7 GPa) than the SiC ceramics sintered with large amount (3 wt%) of Y 2 O 3 additives (542 MPa and 26.1 GPa), and exhibited superior wear resistance. 84) Li et al 85) found that toughened SiC prepared by hot pressing showed high hardness and fracture toughness compared to the SiC ceramics prepared through pressureless sintering or reaction sintering. The same trend reflected for resistance against friction and wear in water-lubrication conditions against SiC counterbody.…”

High thermal conductivity of spark plasma sintered silicon carbide ceramics with yttria and scandia

“…Silicon carbide (SiC) is an important engineering ceramic due to a unique combination of properties, such as high thermal conductivity, excellent wear and corrosion resistances, and high‐temperature mechanical properties . SiC‐ceramic applications include heaters, susceptors, dummy wafers for the processing of semiconductors and light‐emitting diodes (LED), diesel particulate filters, and heat exchangers, taking advantage of the excellent thermal conductivity and relative properties of the material.…”

Synthesis of B4C-SiC in-Situ Composite Powders through Carbothermic Reactions

“…Development of SiC ceramics for aerospace and nuclear industries, for bearings, mechanical seals, nozzles, turbine parts, heat exchangers, cylinder liners, and for cutting tools have recently been in the focus of research, because of their superior properties, such as low density, high strength and toughness, high melting points, good oxidation and thermal shock resistance [1][2][3][4][5][6][7][8]. For this reason SiC can be chosen as a better candidate material by a number of researchers [9,10].…”

“…The reaction (1) consist of two main reactions, given by Eqs. (5) and (6). The first one is the reaction of SiO 2 with B 4 C to form SiC, B 2 O 3 , and C. The second is the reaction of intermediate products with C, such that all C in solid state oxides to CO above 1558 • C [8].…”