Development of sol-gel derived coating for NICALON{sup TM}/SiC composites

Conference · Wed May 01 00:00:00 EDT 1996

OSTI ID:233312

Shanmugham, S; Liaw, P K ^[1]; Stinton, D P; Besmann, T M; More, K L; Bleier, A; Porter, W D; Misture, S T ^[2]

---

1. Tennessee Univ., Knoxville, TN (United States)
2. Oak Ridge National Lab., TN (United States)

Mullite and aluminum titanate precursor polymeric sols were developed for applying as coatings on Nicalon{trademark} fabrics and tows. A Nicalon{trademark}/SiC composite with a mullite interface was fabricated. The mullite precursor interface coatings were applied by a vacuum infiltration method and the SiC matrix was deposited by a forced flow chemical vapor infiltration process. Thin, uniform mullite interface coatings were obtained. However, the Nicalon{trademark}/SiC composite exhibited brittle fracture. Mullite and alumina-titania coatings were applied on Nicalon{trademark} tows and the effect of heat treatment at 1000{degrees}C in air is discussed.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 233312
• Report Number(s): CONF-960106--10; ON: DE96009873
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CERAMICS
COATINGS
COMPOSITE MATERIALS
HEAT TREATMENTS
MULLITE
SILICON CARBIDES
SOL-GEL PROCESS
TITANIUM ALLOYS