Zirconium diboride (ZrB 2) is a highly covalent refractory ceramic material with a hexagonal crystal structure. ZrB 2 is an ultra-high temperature ceramic (UHTC) with a melting point of 3246 °C.

Zirconium diboride (ZrB 2) is a material of particular interest because of its excellent combination of high melting point, low theoretical density, high electrical conductivity, good chemical inertness and superb wear resistance. These properties make it an attractive candidate for high-temperature applications such as refractory materials in ...

Zirconium diboride | B2Zr | CID 9812765 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.

2007年5月10日 · This paper reviews the crystal chemistry, synthesis, densification, microstructure, mechanical properties, and oxidation behavior of zirconium diboride (ZrB 2) and hafnium diboride (HfB 2) ceramics. The refractory diborides exhibit partial or complete solid solution with other transition metal diborides, which allows compositional tailoring of ...

2022年3月15日 · Zirconium diboride and zirconium diboride-silicon carbide composite and coating structures have been in development since the early stages of efforts to create vehicles for space travel and have been processed using virtually all known deposition and infiltration techniques.

2022年1月2日 · Zirconium diboride (ZrB 2) is considered as one of the most promising ultra-high temperature materials for the applications in extreme environments. However, the difficulty in fabrication of ZrB 2 limits its industrial applications.

2021年10月4日 · Chromium diboride is used as a sintering additive to improve the properties of boron carbide and titanium diboride ceramics. Zirconium diboride is a component of advanced ultrahigh temperature ZrB 2 –SiC ceramics (UHTC) used in …

2001年10月1日 · Composition: Zirconium Diboride(ZrB2) with 30 volume percent Graphite flakes and 14 volume percent Silicon Carbide (SiC) particulate phase. Manufacturer: There are no current commercial manufacturers of the UHTC materials.

Fenter3 provides a comprehensive review of the work accomplished in the 1960’s and early 1970’s. Additions of silicon carbide are used to enhance oxidation resistance and limit diboride grain growth. Carbon is also sometimes used as an additive to enhance thermal stress resistance.

2013年11月22日 · Zirconium diboride is a strategic material, finding applications as thermal protection system in reentry vehicles, high temperature electrode, thermowell tubes, etc. Solid state reactions require high temperature and thus result in …