Engineering Materials

Engineering materials is a discussion led by Design News Contributing Materials Editor Doug Smock on important new developments and applications that affect mechanical design. Metals covered include all types of steel and nonferrous metals, in all shapes. Resins covered include nylons, polycarbonates, polysulfides, polyimides, and polybutylene terephthalate (PBT). Other materials covered include ceramics and rubber. Topics covered include materials enhancement, new applications, process technology, tooling, sustainability, and economic issues. Posts will include latest news from global events such as K 2007, the Alliance of Plastics Processors Annual Conference, the National Plastics Exposition, and the annual technical conference (ANTEC) of the Society of Plastics Engineers.

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Wednesday, January 23, 2008

Complex Engine Turbines Spur Ceramic Casting Growth

Booming demand for aircraft and power generation plants is fueling higher requirements for a specialized investment casting process that creates complex hollow internal shapes. Use of molded ceramic cores allows turbine engine blades and vanes to be cast to size with complex cooling passages, permitting engines to operate at higher temperatures with greater efficiency. GE Aviation has a record number of engines on order through 2012, its third record year in a row. The cores are also used for turbines in natural gas power generation plants.

One of the beneficiaries is a company called Certech, which is the largest independent producer of ceramic cores for investment casting. Technology growth is in materials development. “We’re always looking for a better mousetrap to give a better yield to the customer,” says Michael Kasberg, vice president and general manager of Certech. “When they pour metal around our parts sometimes they want to pour hotter metal. As a result you need a ceramic that won’t melt when it sees a higher temperature. “

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