Application of Engineering Ceramics（工程陶瓷的应用）.pdfVIP

MME 467: Lecture 15 Application of Engineering Ceramics The use of ceramic materials in science and industry is becoming increasingly widespread. This chapter will briefly review structural, refractory, and energy production applications of ceramic materials. Research and development efforts will continue to expand the applications of ceramic materials. Thus, it should be noted that many applications that are termed potential here may soon become actual applications, and many new ones will be added to the current list of applications. 1. Structural Applications Due to their brittle nature, monolithic ceramics are sensitive to defects that act as stress concentrators. Therefore, structural applications of monolithic ceramics are limited to parts that are subjected to compressive loading or limited tensile or multiaxialloading. Another important factor to consider is conditions that can lead to impact loading and thermal shock. Most monolithic ceramics are not suitable for these conditions. A well-known example is glass and porcelain ware commonly used in our daily lives. Some special glasses with low thermal expansion have been developed for improved thermal shock resistance. Porous ceramics typically used as refractories and some dense, monolithic ceramics such as Si N and SiC have good thermal shock properties. Ceramic matrix 3 4 composites provide some tolerance to defects and dynamic or thermal loading. Some examples of structural applications of ceramic materials are bearings, seals, armours, liners, nozzles, and cutting tools. Bearings Due to their current high cost, ceramic bearings and journals are used only for prec