ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Recent experiment showed that nano-fibers composite ceramics, fabricated through SHSprocess, can acquire high toughening and strengthening. Composite ceramics are mainly composedof fiber eutectic structures with random orientation, in which nanometer sized zirconia fibers aredispersed within the alumina matrix. First, it can be visualized that tensile force is transmitted fromthe matrix to the nano-fiber by means of shear stress that develop along the fiber- matrix interface.Then the mesomechanical strength model of the fiber eutectic structure is built. The longitudinaltensile stress of the fiber eutectic structure and shear stress on the surface of the fiber eutecticstructure are obtained. They related to the volume fraction and slenderness ratio of the nano-fibers,and external strain of the fiber eutectic structure. Then considering random orientation of the fibereutectic structure, as composite ceramics is subjected to tensile stress, external strain of the fibereutectic structure can be determined. Finally, theoretical expression for the strength prediction ofcomposite ceramics is gotten
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.121-123.1157.pdf
