Accession Number : ADA297856

Title :   Transport Phenomena Studies, VIA Computational Simulation, in Structural Materials Processing.

Descriptive Note : Final rept. 1 Sep 94-31 May 95,

Corporate Author : SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT

PDF Url : ADA297856

Report Date : 07 JUN 1995

Pagination or Media Count : 72

Abstract : The objective of the present STTR project is to develop computational tools necessary to simulate processing of structural materials. Processes considered are chemical vapor deposition (CVD) and chemical vapor infiltration In the Phase I work discussed in this report, an existing SRA computational fluid dynamics code has been adapted to apply to CVD modeling. Multicomponent diffusion, thermal diffusion, homogeneous and surface reactions and conjugate heat transfer have been included. A model for infiltration of porous preforms has been developed for CVI. The models and code were used to study CVD of silicon carbide, CVD of boron on tungsten wire, and CVI of SiC-SiC preforms. The models were first validate for silicon deposition. In all cases, it was demonstrated that numerical simulation can serve as a design tool by enabling cost-effective parametric study to understand mechanisms and allow optimization. (MM)

Descriptors :   *COMPOSITE MATERIALS, *CERAMIC MATRIX COMPOSITES, *INFILTRATION(FLUIDS), HEAT TRANSFER, MATHEMATICAL MODELS, SIMULATION, OPTIMIZATION, SPACECRAFT, PARAMETRIC ANALYSIS, COST EFFECTIVENESS, THERMODYNAMICS, PROCESSING, HIGH TEMPERATURE, WIRE, NUMERICAL ANALYSIS, THERMAL STABILITY, CHEMICAL VAPOR DEPOSITION, COMPUTATIONAL FLUID DYNAMICS, POROSITY, CODING, TRANSPORT PROPERTIES, THERMAL DIFFUSION, AEROSPACE CRAFT, SURFACE REACTIONS, BORON, SILICON CARBIDES, TUNGSTEN, CONSTRUCTION MATERIALS, HOMOGENEITY.

Subject Categories : Ceramics, Refractories and Glass
      Laminates and Composite Materials
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE