Accession Number : ADA602930


Title :   Finite Element Analysis Modeling of Chemical Vapor Deposition of Silicon Carbide


Descriptive Note : Master's thesis


Corporate Author : AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT


Personal Author(s) : Allen, Brandon M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a602930.pdf


Report Date : 19 Jun 2014


Pagination or Media Count : 191


Abstract : Fiber-reinforced silicon carbide (SiC) composite materials are important for many applications due to their high temperature strength, excellent thermal shock and impact resistance, high hardness, and good chemical stability. The microstructure and phase composition of SiC composites can be tailored by fiber surface modification, the process parameters, and/or fiber preform architecture. One process by which SiC composites can be produced is chemical vapor deposition (CVD). This thesis primarily focuses on mass transport by gas-phase flow and diffusion, chemical reaction in gas phase and on solid surfaces, and thin film formation on curved surfaces, which are fundamental to the CVD process. We highlighted process parameters that can potentially affect the structures and properties of the CMCs using simple model material systems. We also analyzed the use of a finite element modeling tool, COMSOL Multiphysics, to build the series of models.


Descriptors :   *CERAMIC MATRIX COMPOSITES , *CHEMICAL VAPOR DEPOSITION , *FINITE ELEMENT ANALYSIS , *SILICON CARBIDES , CHEMICAL REACTIONS , DIFFUSION , FIBER REINFORCEMENT , FLUID FLOW , MASS TRANSFER , MODELS , SURFACES , THERMODYNAMICS , THIN FILMS


Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Ceramics, Refractories and Glass
      Laminates and Composite Materials
      Numerical Mathematics


Distribution Statement : APPROVED FOR PUBLIC RELEASE