Processing and Properties of Coated HPZ Fiber Reinforced Glass-Ceramic Matrix Composites
Abstract
The main objective of this program was to utilize fiber coatings to tailor, or 'engineer', the chemistry and bonding characteristics of the fiber/ matrix interface in glass-ceramic matrix composites reinforced with Dow Corning's polymer derived Si-N-C-0 'HPZ' fibers such that relatively weak bonding exists at the interface to allow matrix crack deflection to occur, thus increasing the toughness and damage tolerance of the composite, while at the same time maintaining the high temperature oxidative stability of the matrix/ coating/fiber interfacial region. In addition, for this particular system which is inherently reactive, the fiber coating must also act as a barrier to interdiffusion and reaction. A secondary objective of this program is to investigate advanced composite processing methods other than the traditional hot-pressing, such as hot isostatic pressing (HIP) and glass matrix transfer molding into integrally woven fiber preforms. During the performance of this contract, the microstructure and properties of HPZ fibers, CVD BN and SiC/BN coatings on HPZ fibers, and barium magnesium aluminosilicate (BMAS) glass- ceramic composites fabricated with these coated fibers were investigated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1993
- Accession Number
- ADA265177
Entities
People
- David Jarmon
- John K Brennan
- Philip Mccluskey
- William Allen
Organizations
- United Technologies Corporation