Airoldi, A.

Caporale, A. M.

De Stefano Fumo, M.

Galizia, P.

Guida, D.

Mor, M.

Sciti, D.

Servadei, F.

Vinci, A.

Zoli, L.

English

Archivio istituzionale della ricerca - Politecnico di Milano

____________________________________________________________________________________ _____________________________________________________________________________________ Plasma wind tunnel test of UHTCMC leading edge prototypes in hypersonic conditions  Diletta Sciti1, Antonio Vinci1, Luca Zoli1, Matteo Mor1, Francesca Servadei1, Pietro Galizia1, Alessandro Airoldi2, Antonio Maria Caporale2, Daniele Guida3, Mario De Stefano Fumo3  1CNR-ISSMC, National Research Council of Italy - Institute of Science, Technology and Sustainability for Ceramics, Via Granarolo 64, 48018 Faenza, Italy 2Politecnico di Milano, Department of Aerospace Science and Technology – Milan, Italy 3CIRA, Italian Aerospace Research Centre - Capua, Italy diletta.sciti@issmc.cnr.it  Abstract  For the first time, prototypes of UHTCMC with a leading-edge profile were evaluated in a hypersonic plasma wind tunnel at CIRA in Italy. Two sets of samples were produced: one set involved machining UHTCMC manufactured by impregnating unidirectional carbon preforms with a 0/90° architecture, followed by sintering and EDM machining. The unique geometry of the leading edge caused the fiber orientation to deviate from the outer profile. The second set comprised three leading edges created through polymer infiltration and pyrolysis to achieve a near-net shape prototype with fiber alignment along the profile. All six prototypes were placed in a customized sample holder (Fig. 1) and exposed to a high enthalpy flow in the Scirocco plasma wind tunnel facility. Notably, the two types of prototypes, due to different manufacturing processes, exhibited distinct compositions, leading to variations in thermal behavior. The temperature for sintered samples gradually increased to around 1900°C, while for PIP-derived samples, the temperature immediately rose to 2000°C with a constant profile. Following three minutes of stable flux conditions, the samples were cooled down to room temperature, undergoing a slight weight change. Microstructural analyses were conducted to thoroughly investigate the materials oxidation, and mechanical tests were scheduled to understand the strength degradation caused by exposure in the Scirocco environment.   Figure 1: (Left) leading edge prototypes and (right) their placement in the sample holder with four thermocouples 

Plasma Wind Tunnel Test of UHTCMC Leading Edge Prototypes in Hypersonic Conditions

https://re.public.polimi.it/bitstream/11311/1266204/1/SCITD01-24.pdf

Plasma Wind Tunnel Test of UHTCMC Leading Edge Prototypes in Hypersonic Conditions

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Archivio istituzionale della ricerca - Politecnico di Milano