The study of Thermal Protection Systems (TPS) is largely performed in Plasma Wind Tunnel (PWT) facilities where sample wear rate is of main interest and the knowledge of its relation with sample surface temperature desirable. The intrusive and indirect methods employed so far reduce the reliability and the accuracy of these tests. A new joined technique based on both the Surface Layer Implantation of radioactive tracers and on the emissivity-free Dual Color Infra-Red thermography allows the online measure of both the TPS wear rate and the surface temperature without any preparation (i.e. modification) of the sample. Other Ion Beam Analysis techniques like the Rutherford Backscattering Spectrometry (RBS) can be employed off-line to perform integrative, quantitative and still not intrusive analysis of TPS composition and of the structure modifications occurred during the PWT tests. In this work we present the results of a discrete wear rate measurement of an ablative TPS implanted with 7Be ions and the feasibility study of the RBS technique to investigate the oxidation of ceramic TPS.
Ion Beam Analysis for recession determination and composition estimate of aerospace Thermal Protection System materials
Buompane R.;D'Onofrio A.;Porzio G.;Gialanella L.
2020
Abstract
The study of Thermal Protection Systems (TPS) is largely performed in Plasma Wind Tunnel (PWT) facilities where sample wear rate is of main interest and the knowledge of its relation with sample surface temperature desirable. The intrusive and indirect methods employed so far reduce the reliability and the accuracy of these tests. A new joined technique based on both the Surface Layer Implantation of radioactive tracers and on the emissivity-free Dual Color Infra-Red thermography allows the online measure of both the TPS wear rate and the surface temperature without any preparation (i.e. modification) of the sample. Other Ion Beam Analysis techniques like the Rutherford Backscattering Spectrometry (RBS) can be employed off-line to perform integrative, quantitative and still not intrusive analysis of TPS composition and of the structure modifications occurred during the PWT tests. In this work we present the results of a discrete wear rate measurement of an ablative TPS implanted with 7Be ions and the feasibility study of the RBS technique to investigate the oxidation of ceramic TPS.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
