Comportamiento mecánico a alta temperatura de cerámicas de nitruro de silicio

Determination of fracture toughness and elastic module in materials based silicon nitride

“…The increasing demand in the use of these new materials warrants having the data necessary to predict its behavior and its useful life under the conditions of service for which its use is projected (Richerson, 2012;Zhou et al, 2006). In this way, the tests for determination fracture toughness and its elastic modulus become indispensable to establish the patterns of design and use of these new materials, taking into account that it is necessary to have a greater reliability as well as, a better prediction of the performance of the mechanical components in which they will be used to operate efficiently, even under more severe operating conditions in terms of high temperatures, loads and speeds (Melendez, 2001). The mechanical failure of the ceramic materials is mainly due to structural defects.…”

Mechanochemical synthesis of ZrB2–SiC–ZrC nanocomposite powder by metallothermic reduction of zircon

“…ZrB 2 based ceramics have attracted much attention especially in the areas where wear-corrosion-oxidation resistance is demanded; such as high temperature electrodes, molten metal crucibles, thermal protection systems for hypersonic flights, atmospheric re-entry vehicles, rocket propulsion systems, and nose caps [2][3][4]. However, ZrB 2 is not only difficult to sinter, but also by itself does not meet all the necessary requirements demanded by the extreme conditions encountered in the aerospace engineering [5,6].…”