Oxidation behavior of 2D C/SiC composites coated with multi-layer SiC/Si–B–C/SiC coatings under wet oxygen atmosphere

More effective crack self‐healing capability of SiCf/SiC‐B4C with Al2O3 modified under wet environment

“…Table 1 summarizes the cracks healing property of typical boron‐containing self‐healing composites under different test condition. It can be clearly seen that the cracks in the interior of composites are relatively easy to be healed whether in air or wet environment compared to cracks in the surface 5,7,11,14,23–26,28,31 . As the oxidation time rises, the healed cracks will be re‐formed due to the volatilization of self‐healing glass phase in wet environment 26 .…”

“…It can be clearly seen that the cracks in the interior of composites are relatively easy to be healed whether in air or wet environment compared to cracks in the surface. 5,7,11,14,[23][24][25][26]28,31 As the oxidation time rises, the healed cracks will be re-formed due to the volatilization of self-healing glass phase in wet environment. 26 Our work illustrates that the SiC-B 4 C matrix modified with Al 2 O 3 possesses more excellent cracks healing property than typical boron-containing self-healing matrix in wet atmosphere and this cracks healing property will continue over oxidation time.…”

“…When the temperature was above 900°C, the water vapor leaded to significant mass loss of B 2 O 3 . Similarly, Liu et al 9,11 evaluated the crack sealing function of multi-layer SiC/Si-B-C/SiC coatings at different temperature under wet oxygen atmosphere. The increasing water partial pressure could accelerate the volatilization of borosilicate glass and weaken the crack sealing function of glass when the oxidation temperature was above 1000°C.…”

Characterization of micro-arc oxidation coatings on Ti6Al4V with addition of SiC particle

“…Silicon carbide (SiC) is known for its outstanding hardness, good wear resistance, and hightemperature stability, indicating that SiC can withstand high temperature during the MAO process and be a good supporter on MAO surfaces. While it is rarely reported to using SiC as an additive to the MAO treatment though it has been used for coating in other techniques [18][19][20][21].…”

Enhanced mechanical properties of SiC reticulated porous ceramics via adjustment of residual stress within the strut

“…13,14 Besides, vacuum infiltration of alumina slurry was confirmed to be an efficient approach to produce SiC RPCs with multilayered struts, the hollow skeleton was filled up and the skeleton surface was coated by infiltration slurry during vacuum infiltration process. 15,16 However, like composite materials containing coating, 17 the surface cracks easily formed on the outer layer of SiC RPCs due to the large thermal expansion mismatch between outer layer and SiC skeleton, thus weakening the mechanical properties of SiC RPCs. 18,19 It was reported that the formation of surface cracks in laminated material was attributed to the existence of residual tensile stress in outer layer.…”