Pressureless reactive sintering of ZrB2 ceramic

Oxidation resistance of SHS Fe–Al–Si alloys at 800 °C in air

“…In some processes, cold pressing and reactive sintering are replaced by reactive hot isostatic pressing [20]. Powders can be pre-activated by high energy millingemechanical alloying [21]. The energy for the activation of chemical reactions during reactive sintering is supplied by heating in vacuum or protective-atmosphere furnace [18,19] or by electric discharge [22,23].…”

Microstructural Evaluation of ZrB₂/ZrO₂ Ceramic Powders Prepared by Milling-Assisted Magnesiothermic Reduction of Oxide Raw Materials

“…Based on these properties, ZrB 2 -based ceramics are attracting more and more attention in ultrahigh temperature applications where resistance to corrosion, wear and oxidation is demanded (Fahrenholtz and Hilmas, 2007;Zhu et al, 2009aZhu et al, , 2009b. They have been found to be suitable materials in various usage areas such as electrodes, thermowells, molten metal crucibles, armors, thermal protection systems for hypersonic flight, atmospheric re-entry vehicles, rocket propulsion and nose caps (Melendez-Martinez et al, 2002;Chamberlain et al, 2004;Monteverde et al, 2008;Brouchu et al, 2009). Furthermore, they have been used as wear parts, nozzles, coating on cutting tools and cathodes for electrochemical processing of aluminium (Upadhya et al, 1997;Opeka et al, 1999).…”

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].…”