Effect of TiC Reinforcement on Densification, Structural Evolution and High-Temperature Oxidation Behaviour of ZrB2-20 vol pct SiC Composite

Sengupta, P.; Basu, Suddhasatwa; Manna, I.

doi:10.1007/s11661-023-06982-5

Cited by 8 publications

(1 citation statement)

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“…Relatively high oxidation resistance in an atmosphere containing oxygen for units of tens of minutes is one of the basic properties of ultra-high-temperature materials for aerospace applications. Ongoing studies have confirmed that the introduction of silicon carbide or refractory metal silicide into the composition of UHTCs based on ZrB 2 (HfB 2 ) supports a significant increase in their resistance to oxidation at temperatures >1800-2000 • C, including under the influence of high-speed gas flows containing atomic oxygen (which is characteristic of aerodynamic heating by supersonic/hypersonic air flows) while maintaining increased thermal conductivity [16,[25][26][27][28][29][30][31][32][33]. Modification of these ceramic materials with carbon materials (graphite, carbon fibers or carbon nanotubes), as shown in [34][35][36][37][38][39][40][41], makes it possible to slightly improve crack resistance and thermal shock resistance.…”

Section: Introductionmentioning

confidence: 95%

Oxidation of Ceramic Materials Based on HfB2-SiC under the Influence of Supersonic CO2 Jets and Additional Laser Heating

Simonenko,

Kolesnikov,

Chaplygin

et al. 2023

IJMS

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The features of oxidation of ultra-high-temperature ceramic material HfB2-30 vol.%SiC modified with 1 vol.% graphene as a result of supersonic flow of dissociated CO2 (generated with the use of high-frequency induction plasmatron), as well as under the influence of combined heating by high-speed CO2 jets and ytterbium laser radiation, were studied for the first time. It was found that the addition of laser radiation leads to local heating of the central region from ~1750 to ~2000–2200 °C; the observed temperature difference between the central region and the periphery of ~300–550 °C did not lead to cracking and destruction of the sample. Oxidized surfaces and cross sections of HfB2-SiC-CG ceramics with and without laser heating were investigated using X-ray phase analysis, Raman spectroscopy and scanning electron microscopy with local elemental analysis. During oxidation by supersonic flow of dissociated CO2, a multilayer near-surface region similar to that formed under the influence of high-speed dissociated air flows was formed. An increase in surface temperature with the addition of laser heating from 1750–1790 to 2000–2200 °C (short term, within 2 min) led to a two to threefold increase in the thickness of the degraded near-surface area of ceramics from 165 to 380 microns. The experimental results indicate promising applications of ceramic materials based on HfB2-SiC as part of high-speed flying vehicles in planetary atmospheres predominantly composed of CO2 (e.g., Venus and Mars).

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