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CERMET

CERMET. By : Gustavo Zarate MEEN 3344. What are CERMETS?.

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CERMET

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  1. CERMET By: Gustavo Zarate MEEN 3344

  2. What are CERMETS? Composite material are composed of ceramic and metallic materials. A cermet is ideally designed to have the optimal properties of both a ceramic, such as high temperature resistance and hardness, and those of a metal, such as the ability to undergo plastic deformation.

  3. Composition • CERAMICS: • Tungsten carbide, molybdenum boride, and aluminum oxide. • METALS: • Iron, cobalt, nickel, and chromium.

  4. Uses • Manufacturing: resistors, capacitors, and other electronic components, also vacuum tubes and for joints and seals. • spacecraft: shielding • Bioceramics: play an extensive role in biomedical materials (prosthesis ). • In transportation: as friction materials for brakes and clutches. • Armor: lightweight ceramic projectile proof armor • Nuclear: storage of nuclear waste, fabrication of engines and nuclear reactors.

  5. Properties • High temperature resistance • Hardness • Ability to undergo plastic deformation • Superior wear and corrosion properties • More resistant to high velocity impacts. • Lightweight • The use of ceramic implants extended the life of the hip replacement parts. • Better thermal shock resistance • High strength • Moderate thermal conductivity.

  6. References • Tinklepaugh, James R.: "Cermets.", Reinhold Publishing Corporation, 1960 • Metallurgical Concepts, "Creep and Stress Rupture". http://www.materialsengineer.com/CA-Creep-Stress-Rupture.htm • Pattee, H.E. "Joining Ceramics and Graphite to Other Materials, A Report." Office of Technology Utilization National Aeronautics and Space Administration, Washington D.C., 1968

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