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Synthesis of high performance ceramic fibers by chemical vapor deposition for advanced metallics reinforcing
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hlavacek, Vladimir Revankar, Vithal |
| Copyright Year | 1991 |
| Description | The chemical vapor deposition (CVD) synthesis of fibers capable of effectively reinforcing intermetallic matrices at elevated temperatures which can be used for potential applications in high temperature composite materials is described. This process was used due to its advantage over other fiber synthesis processes. It is extremely important to produce these fibers with good reproducible and controlled growth rates. However, the complex interplay of mass and energy transfer, blended with the fluid dynamics makes this a formidable task. The design and development of CVD reactor assembly and system to synthesize TiB2, CrB, B4C, and TiC fibers was performed. Residual thermal analysis for estimating stresses arising form thermal expansion mismatch were determined. Various techniques to improve the mechanical properties were also performed. Various techniques for improving the fiber properties were elaborated. The crystal structure and its orientation for TiB2 fiber is discussed. An overall view of the CVD process to develop CrB2, TiB2, and other high performance ceramic fibers is presented. |
| File Size | 5779057 |
| Page Count | 167 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910018014 |
| Archival Resource Key | ark:/13960/t01022z9k |
| Language | English |
| Publisher Date | 1991-05-01 |
| Access Restriction | Open |
| Subject Keyword | Nonmetallic Materials Stress Analysis Ceramic Matrix Composites Mechanical Properties Ceramics High Temperature Fabrication Thermal Expansion Vapor Deposition Reinforcing Fibers Metal Matrix Composites Thermal Stresses Matrix Materials Crystal Structure Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
