2022
DOI: 10.3390/ma15238507
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Investigation of the Effect of Supersonic Flow of Dissociated Nitrogen on ZrB2–HfB2–SiC Ceramics Doped with 10 vol.% Carbon Nanotubes

Abstract: The method of fabricating dense ultra-high temperature ceramic materials ZrB2–HfB2–SiC–CCNT was developed using a combination of sol-gel synthesis and reaction hot pressing approaches at 1800 °C. It was found that the introduction of multilayer nanotubes (10 vol.%) led to an increase in the consolidation efficiency of ceramics (at temperatures > 1600 °C). The obtained ZrB2–HfB2–SiC and ZrB2–HfB2–SiC–CCNT materials were characterized by a complex of physical and chemical analysis methods. A study of the effe… Show more

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Cited by 10 publications
(4 citation statements)
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“…The HfB 2 -30vol.%SiC ceramic material was prepared using the reaction hot pressing method described in [30][31][32], as the use of the reaction sintering technique allows for a slightly lower consolidation temperature [22,[33][34][35][36]. Briefly, the synthesis of the initial HfB 2 -SiO 2 -C powder was carried out using sol-gel technology and its further hot pressing was performed using a hot press model HP20-3560-20 (Thermal Technology Inc., Minden, NV, USA) at a temperature of 1800 • C (heating rate 10 • /min) and a uniaxial pressure of 30 MPa in an argon atmosphere; the dwell time was 15 min.…”
Section: Ceramic Sample Preparationmentioning
confidence: 99%
See 1 more Smart Citation
“…The HfB 2 -30vol.%SiC ceramic material was prepared using the reaction hot pressing method described in [30][31][32], as the use of the reaction sintering technique allows for a slightly lower consolidation temperature [22,[33][34][35][36]. Briefly, the synthesis of the initial HfB 2 -SiO 2 -C powder was carried out using sol-gel technology and its further hot pressing was performed using a hot press model HP20-3560-20 (Thermal Technology Inc., Minden, NV, USA) at a temperature of 1800 • C (heating rate 10 • /min) and a uniaxial pressure of 30 MPa in an argon atmosphere; the dwell time was 15 min.…”
Section: Ceramic Sample Preparationmentioning
confidence: 99%
“…This leads to the idea of using them in other gas environments, including the atmospheres of Mars, Venus, and Titan. However, there is a very small number of publications describing the behavior of such materials in non-air gas flows [20][21][22][23][24][25], mainly focusing on nitrogen atmospheres. Studies of UHTC's behavior in high-enthalpy carbon dioxide jets may be of interest for modeling the effects of Venus's atmosphere, which presents more demanding entry conditions than on Earth [26][27][28].…”
Section: Introductionmentioning
confidence: 99%
“…Studies of the behavior of ultra-high-temperature ceramics in non-air gas atmospheres are virtually non-existent in the literature. There are only single papers investigating the behavior of such materials in nitrogen [47][48][49][50] and argon-hydrogen plasma [51]. For ceramics based on the HfB 2 -SiC system, there are only two studies on the effects of highspeed flows of dissociated nitrogen [49,50].…”
Section: Introductionmentioning
confidence: 99%
“…There are only single papers investigating the behavior of such materials in nitrogen [47][48][49][50] and argon-hydrogen plasma [51]. For ceramics based on the HfB 2 -SiC system, there are only two studies on the effects of highspeed flows of dissociated nitrogen [49,50]. At the same time, it will be necessary to provide even higher oxidation resistance for sharp-edged materials to work in the atmospheres of the mentioned planets, since it is known that the atmosphere of both Mars and Venus is dominated by CO 2 (95-96% [52][53][54]), which should exert an even higher thermal load on parts due to the increased chemical component during high-speed motion [9].…”
Section: Introductionmentioning
confidence: 99%