The thermo-mechanical architecture and TPS configuration of the pre-X vehicle

Tensile creep and rupture of 2D-woven SiC/SiC composites for high temperature applications

“…Sauder and Lamon actually resistance heated the fibers and were able to obtain a more uniform hot zone and performed the tests in vacuum without the added complication of a receding fiber diameter due to oxidation. 1 Perhaps the variability between Bunsell and Sauder-Lamon data is due to the test technique; however, it is also very likely that the older fiber vintages tested by Bunsell were inferior compared to the more recent vintages tested by Sauder-Lamon due to further fiber processing improvements. 1 It should be noted that Si volatilization can occur in vacuum resulting in an effective reduction in SiC fiber diameter; however, this was only significant at 1450 • C. The creep data from composites in this study will be compared to the fiber data from Sauder and Lamon.…”

“…Historically, single-use hypersonic applications have relied on carbon fiber-reinforced carbon matrix or SiC matrix composites that could survive the short times (minutes) required for exit and/or entry into the atmosphere. 1 However, for multiple use re-entry applications or long-time high temperature gas turbine environments, SiC fiber-reinforced SiC matrix composites are now being strongly considered as a reusable structural material candidate. 2,3 2D-woven composites with slurry-cast Si melt-infiltrated (MI) SiC-based matrices reinforced with polycrystalline fibertypes such as Sylramic-iBN or Hi-Nicalon Type-S have been shown to be materials capable of 1315 • C for relatively long times and moderate tensile stress levels (greater than 100 MPa).…”

Self passivating behavior of multilayer SiC under simulated atmospheric re-entry conditions

“…4,5 Then the technology readiness level of C f /SiC for these applications is very high (TRL 6-7). These ceramic matrix composites (CMCs) are produced by infiltrating fiber performs with precursors of the SiC matrix according to different possible techniques: polymer impregnation and pyrolysis (PIP), 2,3 chemical vapor infiltration (CVI), 2,5 liquid silicon infiltration (LSI).…”

Corrosion Behavior of SiC Laminate Under Decomposed Sulfuric Acid at 850°C

“…SiC‐based materials have great potential for applications in aggressive environment at very high temperature as SiC shows a peculiar set of properties: very high melting point, good stiffness and strength both at room and high temperatures, wear resistance, low density, rather good electrical and thermal conductivity, and good oxidation resistance resulting from passivating behavior. For this reason, SiC‐based materials have been proposed, and widely investigated, for engineering applications in nuclear reactors, turbine engines, and thermal protection systems of space vehicles . As for other ceramic materials, the main concern with SiC materials relates to their poor fracture toughness.…”