High-temperature corrosion of silicon carbide ceramics by coal ashes

Research of Al2O3-SiC-C refractories as chromia-free lining for gasifier

“…Furthermore, the addition of TiO 2 and ZrO 2 in appropriate amounts could promote the formation of spinel protection layer on the corrosion interface, which further improved their penetration resistance [7]. In addition, Herrmann et al reported that SiC-based refractories demonstrated high stability when exposed to coal ashes under a simulative atmosphere of gasifier [8]. However, this kind of SiCbased refractories possessed high apparent porosity and big pore size, resulting in the fact that coal ashes could penetrate easily into the pores of the refractories.…”

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

“…Silicon carbide (SiC) ceramics are attractive because of their unique combination of superior properties such as high strength, high hardness, high thermal conductivity, excellent resistance to wear and corrosion [1][2][3][4][5][6][7][8][9]. Owing to these properties, SiC ceramics are preferred for several tribological applications such as bearings, mechanical seals, nozzles, turbine parts, heat exchangers, cylinder liners, and cutting tools.…”

“…(4) The sliding wear resistance of LPS-SiC sintered with rareearth oxide (RE 2 O 3 ) increased with decreasing size of RE 3 þ cation in the RE 2 O 3 for both lubricated and unlubricated conditions [17,22]. (5) The reduction in additive content and grain refinement resulted in improved wear resistance of LPS-SiC under lubricated [19,21,23] and unlubricated conditions [17]. But LPS-SiC with toughened microstructure exhibited improvement in sliding wear resistance than LPS-SiC with equiaxed microstructure [17,20].…”

Effect of WC addition on sliding wear behavior of SiC ceramics

“…Silicon carbide (SiC) ceramics exhibit promising tribological behavior and are considered suitable for various structural applications, including mechanical seals, semiconductor processing parts, armor plates, mirrors for telescopes, bearings and cylinder liners, due to their superior properties, such as high hardness, high temperature strength, low friction, high thermal conductivity and excellent resistance to wear and corrosion [1][2][3][4][5][6][7][8][9][10]. The successful application of ceramics as triboelements at elevated temperatures requires a complete understanding of their tribological behavior.…”