Oxidation of graphene-modified HfB2-SiC ceramics by supersonic dissociated air flow

Recent advances in precursor-derived ceramics integrated with two-dimensional materials

“…44 Furthermore, SiC (Al, rGO) composites still have a stable structure, even after being burned by a butane gun flame in air, which makes them promising candidates for applications in high-temperature environments, for example, as aerospace components. Recently, Simonenko et al 124 reported an interesting result. In a dense ultra-high-temperature ceramic with a water-cooled module, the introduction of rGO leads to an improvement in high temperature stability.…”

Investigation of the Effect of Supersonic Flow of Dissociated Nitrogen on ZrB2–HfB2–SiC Ceramics Doped with 10 vol.% Carbon Nanotubes

“…The synthesis of the composite powders required for the subsequent reaction hot pressing was carried out by the method similar to those presented in [ 12 , 55 ], in which the UHTC material HfB 2 –SiC was modified by the carbon nanomaterial and reduced graphene oxide was obtained. In particular, powders of ZrB 2 , HfB 2 and CNTs were dispersed in the solution of phenol-formaldehyde resin LBS-1, then tetraethoxysilane was introduced under stirring and subjected to controlled hydrolysis (ratio n (Si): n (H 2 O) was 1:5).…”

“…To produce 35 vol.% ZrB 2 –35 vol.% HfB 2 –30 vol.% SiC (ZHS) and 31.5 vol.% ZrB 2 –31.5 vol.% HfB 2 –27 vol.% SiC–10 vol.% C CNT (ZHSC) ceramic materials, synthesized composite powders were sintered in graphite moulds using a hot-pressing press by Thermal Technology Inc. (model HP20-3560-20) in argon current at 1800 °C (heating rate 10 °C/min, holding time 30 min) and uniaxial pressure 30 MPa [ 12 , 15 , 55 , 56 , 57 , 58 ].…”

“…The optical properties also allow the materials on which they are based to be considered as components of alternative energy devices [ 7 , 8 , 9 , 10 , 11 ]. The formation of a protective borosilicate glass layer during oxidation, which prevents rapid degradation of deeper ceramic layers, leads to the fact that materials based on zirconium/hafnium diborides and silicon carbide can withstand even long-term exposure to high-speed dissociated air flows at surface temperatures of up to 2500 °C [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ].…”

Influence of laser energy density on the microstructure and corrosion resistance of LPBF‐fabricated titanium‐based nanocomposites

“…[16] LPBF-processed B 4 C/Ti showed a remarkable improvement in the ultimate tensile strength and microhardness compared with the Ti matrix. [12] Recently, graphene oxide (GO) has gained popularity as a reinforcement to strengthen polymers, ceramics, and metals, [17][18][19] due to its superior mechanical qualities, low density, and good self-lubricity. Additionally, the large interface contact area with the metal matrix and the enormous specific surface area of the GO contribute to the high strength efficiency.…”