Preparation of zirconium boride

Synthesis and consolidation of zirconium diboride: review

“…Another phase, ZrC was observed along with ZrB 2 . The presence of 26 Reactive plasma spraying (RPS) is an alternative for synthesis of ZrB 2 , when it is desired in the form of coating. In RPS, a reaction takes place between the precursor particles and the plasma or between powder particles in the plasma.…”

Reaction Processes and Characterization of ZrB2 Powder Prepared by Boro/Carbothermal Reduction of ZrO2 in Vacuum

“…Because of these excellent properties, ZrB 2 has become a candidate for use in thermal protection systems and scramjet engine components for hypersonic flight vehicles, as well as high‐temperature electrodes, and molten metal containment systems 2 . ZrB 2 powder can be obtained by many methods, 3–10 which are attributable to three main synthesis routes: (1) reduction processes, (2) chemical routes, and (3) reactive processes 1 . The most practical and convenient way of obtaining ZrB 2 is boro/carbothermal reduction (BCTR) of ZrO 2 with B 4 C and carbon, based on the reaction 5,10–12 : …”

“…Based on this method, previous researchers have prepared the ZrB 2 powder and obtained some significant results 10–12 . Funke and Yudkovskii 10 reported the influence of the chemical composition and particle size of the starting B 4 C on the chemical and phase compositions of the resultant ZrB 2 . Kuzenkova and Kislyi 11 indicated that the ZrB 2 powder via BCTR on hydrogen contained ZrB 12 and developed processing methods to eliminate the ZrB 12 phase.…”

Mechanical properties of borothermally synthesized zirconium diboride at elevated temperatures

“…Transition metal diborides (MeB 2 , such as TiB 2 , ZrB 2 , and HfB 2 ) powders have been successfully synthesized through a variety of different reactions including carbothermal, carbo/ borothermal and borothermal reduction (Reactions 1, 2, 3, and 4). [10][11][12] The carbothermal and carbo/borothermal reduction reactions both utilize a carbon source which could remain as an impurity in the synthesized powder. This carbon impurity can result in the formation of an undesired secondary carbide phase and lower the thermal conductivity of ZrB 2 -based ceramics as found by Harrington et al 13 These reactions also require temperatures typically >1500°C.…”

“…Transition metal diborides (MeB 2 , such as TiB 2 , ZrB 2 , and HfB 2 ) powders have been successfully synthesized through a variety of different reactions including carbothermal, carbo/borothermal and borothermal reduction (Reactions , , , and ) 10–12 . The carbothermal and carbo/borothermal reduction reactions both utilize a carbon source which could remain as an impurity in the synthesized powder.…”