TABLE OF CONTENTS This appendix summarizes the electrical properties of a wide range of engineering materials. Data are compiled from various sources (vendor s literature, materials handbooks, etc.1 7). All properties are at room temperature and 1 MHz unless otherwise noted.
Metal matrix composites (MMCs) such as those listed in Table F.1 are usually used in applications in which high strength and light weight are required. Examples include compressor blades and pistons. For applications such as these, the electrical properties are unimportant. However, more recent applications have included external components like missile fins. Although these materials are generally considered to be good conductors, the conductivity can vary widely with the percent of fiber in the composite. The fiber content can be as high as 60%, in which case the conductivity may not be in the good conductor range. The resistivities of some good conductors are listed in Table F.2.
| Material | Matrix alloy |
|---|---|
| Fiber-reinforced alumina | Al |
| Continuous aluminum oxide (Al 2O 3) fiber | Al, Mn |
| Continuous boron fiber | B |
| Continuous graphite fiber | Al, Mn, Cu |
| Continuous silicon carbide (SiC) fiber | Ti, Cu, Mn, Al |
| Continuous tungsten fiber | Ni, Co, Fe, Zr, Nb, W, Cr |
| Discontinuous ceramic fiber | Pb, Ti, Mn, Cu, Al |
| Discontinuous silicon fiber | Al, Cu |
| Material | Resistivity, 10 8 ?m |
|---|---|
