Chemical vapor infiltration with microwave heating

Conference · Wed Jan 01 04:00:00 EST 1992

OSTI ID:6859194

Devlin, D J; Currier, R P; Barbero, R S; Espinoza, B F

The use of microwave energy to heat substrates during chemical vapor infiltration (CVI) is described. Both numerical predictions and experimentally observed thermal profiles indicate that steep inverted thermal gradients can be established in fibrous preforms subjected to microwave radiation. When combined with the CVI technique, the inverted gradients can be exploited to promote inside-out densification. Recent microwave assisted CVI results, which focus on silicon based matrix materials, are described. Emphasis is placed on the role played by the relative ability of fiber and matrix to dissipate microwave energy. Issues central to further process development, such as the effect of interfacial coating on subsequent microwave processing, are discussed.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6859194
• Report Number(s): LA-UR-92-4391; CONF-930164--2; ON: DE93005458
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
CERAMICS
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
COMPOSITE MATERIALS
DEPOSITION
HEATING
MATERIALS
MATRIX MATERIALS
MICROWAVE HEATING
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
REINFORCED MATERIALS
SILICON COMPOUNDS
SILICON NITRIDES
SUBSTRATES
SURFACE COATING