Читать книгу Metal Oxide Nanocomposites - Группа авторов - Страница 45

Whiskers are the single crystals which are grown with nearly zero defects. They are made from several materials like graphite, silicon carbide, copper, iron etc and exist in the form of short and discontinuous fibers having varied cross sections. Unlike particles, the whiskers have a definite length to width ratio (>1), which allow them to possess extraordinary strengths up to 7000 MPa. Whiskers of ceramic materials exhibit high strengths, moduli and low densities [4]. Due to their high specific strength and modulus, ceramic whiskers are excellently fit for low weight structure composites. Ceramic whiskers are more resist to temperature, mechanical damage and oxidation than metallic whiskers. However, they are more prone to damage while handling.