ETD

Archivio digitale delle tesi discusse presso l'Università di Pisa

Tesi etd-03122021-150302


Tipo di tesi
Tesi di dottorato di ricerca
Autore
D'AMBROSIO, ROBERTO
URN
etd-03122021-150302
Titolo
Production of Ceramic Matrix Composites using non conventional energy sources
Settore scientifico disciplinare
ING-IND/22
Corso di studi
INGEGNERIA INDUSTRIALE
Relatori
tutor Prof. Lazzeri, Andrea
correlatore Dott. Annino, Giuseppe
commissario Prof. Vignoles, Gerard L.
commissario Prof. Salvo, Milena
commissario Prof. Seggiani, Maurizia
Parole chiave
  • Ceramic Matrix Composites
  • SiC/SiC
  • Innovative design
  • Microwave Industrial Equipment and Scale-up
  • Microwave-assisted processes
  • Chemical Vapor Infiltration
Data inizio appello
01/04/2021
Consultabilità
Completa
Riassunto
The research activity was focused on the production of SiC-based Ceramic Matrix Composites (CMCs) using Microwave assisted Chemical Vapor Infiltration (MW-CVI) technology, as a sustainable and economic solution to enable the wider utilization of these materials. The experimental tests have been conducted at an innovative pilot plant, designed acting as an overmoded resonator at the frequencies of interest, where the dimensions and materials of the cavity walls were carefully selected in order to achieve a defined mode density and high fraction of microwave power dissipated in the sample. The design as well as the study of the MW-CVI reactor were supported by means of rigorous numerical modelling based on COMSOL Multiphysics software, to determine the temperature profile and heating dynamic of the sample of interest thus controlling the inside-out SiC-deposition reaction. The design of this pilot plant resulted in a robust MW heated reactor, where CMCs can be quickly heated up to the infiltration temperature with reproducible operating conditions, reduced processing times and high chemical reaction efficiencies.
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