Ultra High Temperature Ceramics Powerpoint

Ultra high temperature ceramics uhtcs are a family of borides nitrides and carbides that are of interest for extreme environments due to their high melting points 3000 c as well as their chemical and oxidation resistance.

Ultra high temperature ceramics powerpoint. These uhtcs are expected to be useful at temperatures above 2000 c in air and also under some of the aggressive aerodynamic conditions. Ultra high temperature ceramic materials for extreme environment applications. O the silica has a high melting temperature and is the refractory component of traditional ceramics. O the clay in traditional ceramics provides workability of the material before firing hardens it and constitutes the major body material.

Among the group of high temperature ceramics those with melting point 3000 c are classified as a special class of ceramics called the ultra high temperature ceramics uhtcs. Ultra high temperature ceramics uhtcs are a class of refractory ceramics that offer excellent stability at temperatures exceeding 2000 c being investigated as possible thermal protection system tps materials coatings for materials subjected to high temperatures and bulk materials for heating elements. Ultra high temperature ceramics uhtcs are candidates for use in sharp leading edge applications. 1 4 an application of particular interest lies in hypersonic flight where the bow shock at sharp leading edges produces temperatures in excess of.

Specifically sintering conditions of nbc 1 x were compatible with hosting of microencapsulated fuel. 9 heat flux temperature. Temperature rise on the inside surface can approach 2000 c in less than 0 15 fig. There are multiple options to manage the intense heating.

The consolidation of fully ceramic microencapsulated fcm fuels has been extended from matrices based on sic to ultra high temperature ceramics uhtc s. Traditional ceramics made from three basic components. Nbc powder in as received chemically treated and composite forms was consolidated. Clay silica flint and feldspar.