Abstract
Properties of paramount importance in thermal management are thermal conductivity and the coefficient of thermal expansion (CTE). The use of carbon fibers has led to significant improvements in the properties of composites of various polymeric, metal and ceramic matrices, but anisotropy of the thermal conductivity and CTE in high thermal conductivity graphitic fibers is a limiting factor. In order to tailor the thermophysical properties of composites, new fibers with isotropic thermophysical properties are required. This research addresses the development of diamond fibers, which have the highest thermal conductivity of any material found in nature, a near-isotropic thermal conductivity and a CTE nearly matching that of semiconductor materials. Both single- crystal and polycrystalline diamond fibers were attempted. For the polycrystalline diamond fibers, Raman and scanning electron microscopy analyses show that diamond coatings were successfully applied toa graphitic fiber substrate. Also, some evidence supports the feasibility of single-crystal diamond fiber formation.
Original language | English |
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Pages (from-to) | 367-372 |
Number of pages | 6 |
Journal | Surface and Coatings Technology |
Volume | 62 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - 1993 Dec 10 |
All Science Journal Classification (ASJC) codes
- General Chemistry
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry