Search Menu
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information
Search Scholarly Publications

Title: Microstructural and infiltration properties of woven preforms during chemical vapor infiltration

Journal Article · · Journal of the American Ceramic Society
DOI: https://doi.org/10.1111/jace.18203 · OSTI ID:1865758
ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [3]
  1. Rolls-Royce Corporation, Indianapolis, IN (United States). Composites Technology Center
  2. Rolls-Royce Corporation, Indianapolis, IN (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
+ Show Author Affiliations

Interface-resolved direct numerical simulations (DNSs) of chemical vapor infiltration (CVI) have been performed over a range of furnace-operating conditions (Thiele moduli) and for practical woven preform geometries. A level-set method is used to resolve the geometry of the initial preform at tow scale. The interface between the vapor and solid phase is then evolved in time through the entire CVI densification cycle, fully resolving the time-varying topology between the two phases. In contrast to previous level-set methods for CVI simulation, the physical reaction and diffusion processes govern the level-set movement in the current approach. The surface deposition kinetics is described by the usual one-step model. In this paper, the DNS data are used to study the evolving porosity, surface-to-volume ratio, and flow infiltration properties (permeability and effective diffusivities). Additionally, comparisons are made to popularly-assumed structure functions and the standard, Kozeny–Carmen porous media model commonly employed in modeled CFD simulations of CVI. The virtual DNS experiments reveal a Thiele modulus and preform geometry (fabric layup) dependence which the existing microstructural and infiltration models are not able to describe throughout the entire densification process. The DNS-based, woven geometry-specific correlations can be applied directly to mean-field, furnace-scale CFD simulations.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1865758
Alternate ID(s):
OSTI ID: 1860942
Journal Information:
Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 7 Vol. 105; ISSN 0002-7820
Publisher:
American Ceramic SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (23)

Robust Numerical Simulation of Porosity Evolution in Chemical Vapor Infiltration I: Two Space Dimension journal August 2000
Numerical simulation for fabrication of C/SiC composites in isothermal CVI reactor journal December 2006
Robust Numerical Simulation of Porosity Evolution in Chemical Vapor Infiltration journal July 2002
Direct 3D microscale imaging of carbon–carbon composites with computed holotomography journal January 2003
Modeling of pore structure evolution within the fiber bundle during chemical vapor infiltration process journal December 2011
Experimental kinetic study of the chemical vapour deposition of SiC-based ceramics from gas precursor journal October 1995
Vapor-Phase Fabrication and Properties of Continuous-Filament Ceramic Composites journal September 1991
Prediction of Permeability for Chemical Vapor Infiltration journal June 2013
Modeling of Pore Structure Evolution Between Bundles of Plain Woven Fabrics During Chemical Vapor Infiltration Process: The Influence of Preform Geometry journal November 2012
A sharp interface model for deterministic simulation of dendrite growth journal November 2019
Kokkos: Enabling manycore performance portability through polymorphic memory access patterns journal December 2014
Chemical vapor infiltration: Dispersed and graded depositions for ceramic composites journal November 1993
Gas transport model for chemical vapor infiltration journal September 1995
Theoretical Study of the Pyrolysis of Methyltrichlorosilane in the Gas Phase. 2. Reaction Paths and Transition States journal February 2007
A model for front evolution with a nonlocal growth rate journal October 1999
Reaction and Diffusion Kinetics During the Initial Stages of Isothermal Chemical Vapor Infiltration journal December 1991
Modeling of isobaric–isothermal chemical vapor infiltration: effects of reactor control parameters on a densification journal July 2005
Structural Model Effects on the Predictions of Chemical Vapor Infiltration Models journal June 1996
High Order Anchoring and Reinitialization of Level Set Function for Simulating Interface Motion journal November 2019
On the Homogeneous Chemistry of the Thermal Decomposition of Methyltrichlorosilane: Thermodynamic Analysis and Kinetic Modeling journal June 1994
Ceramic Matrix Composites: Materials, Modeling and Technology book September 2014
Theoretical Study of the Pyrolysis of Methyltrichlorosilane in the Gas Phase. 1. Thermodynamics journal February 2007
Reactional mechanisms of the chemical vapour deposition of SiC-based ceramics from gas precursor journal October 1995

Similar Records

Related Subjects

36 MATERIALS SCIENCE
ceramic matrix composites
chemical vapor infiltration
direct numberical simulations
high performance computing
level-set methods
manufacturing
modeling/model
silicon carbide