ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Recent experiment showed that nano-fibers composite ceramics, fabricated through SHSprocess, could acquire high toughening and strengthening. Composite ceramics are mainly composed offiber eutectic with random orientation, in which nanometer sized zirconia fibers are dispersed within thealumina matrix. First, it can be visualized that tensile force is transmitted from the matrix to thenano-fiber by means of shear stress that develop along the fiber- matrix interface. Then the shear stress onthe surface of the fiber eutectic is obtained. It related to the volume fraction and slenderness ratio of thenano-fibers, and external strain of the fiber eutectic. The maximum shear stress is at the ends of the fibereutectic perpendicular to applied tensile stress. As maximum shear stress on the surface of the fibereutectic is equal to the critical shear stress, the composite ceramics would crack. So the applied tensilestress on composite ceramics arousing the surface crack of the fiber eutectic is gotten
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.2432.pdf
Permalink