Is Rhenium Diboride a Superhard Material?

@article{Qin2008IsRD,
  title={Is Rhenium Diboride a Superhard Material?},
  author={Jiaqian Qin and Duanwei He and Jianghua Wang and Leiming Fang and Li Lei and Yongjun Li and Juan Hu and Zili Kou and Yan Bi},
  journal={Advanced Materials},
  year={2008},
  volume={20}
}
  • J. QinD. He Yan Bi
  • Published 17 December 2008
  • Materials Science
  • Advanced Materials
Superhard materials are usually composed of light elementssuch as boron, carbon, nitrogen, and oxygen. These lightelemental atoms have the ability to form covalently bonded,three-dimensional networks of high atomic density withextreme resistance to external shear. Most researchers agreeonthedefinitionaccordingtowhich‘‘superhard’’materialsarethosewithVickershardness(Hv)higherthan40GPa 

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References

SHOWING 1-10 OF 30 REFERENCES

Response to Comment on "Synthesis of Ultra-Incompressible Superhard Rhenium Diboride at Ambient Pressure"

Dubrovinskaia et al. question our demonstration that rhenium diboride (ReB2) is hard enough to scratch diamond. Here, we provide conclusive evidence of a scratch through atomic force microscopy depth

Comment on "Synthesis of Ultra-Incompressible Superhard Rhenium Diboride at Ambient Pressure"

The synthesis of superhard rhenium diboride (ReB2) at ambient pressure is shown to be not a superhard material, and the prospect for large-scale industrial applications of ReB2 doubtful.

Osmium diboride, an ultra-incompressible, hard material.

In this work, two design parameters are applied to identify ultra-incompressible, superhard materials-high valence electron density and high bond covalency and the first example of such a material is OsB2.

B6O‐Based Composite to Rival Polycrystalline Cubic Boron Nitride

A one-step sintering process is developed to prepare nanostructured super-hard B6O-B4C compacts (see figure) from a mixture of B, B2O3, and B4C precursors at a mild pressure of similar to 3GPa and

Synthesis and Design of Superhard Materials

▪ Abstract The synthesis of the two currently used superhard materials, diamond and cubic boron nitride, is briefly described with indications of the factors influencing the quality of the crystals

Synthesis of superhard cubic BC2N

Cubic BC2N was synthesized from graphite-like BC2N at pressures above 18 GPa and temperatures higher than 2200 K. The lattice parameter of c-BC2N at ambient conditions is 3.642(2) A, which is larger

Boron suboxide: As hard as cubic boron nitride

The Vickers hardness of boron suboxide single crystals was measured using a diamond indentation method. Under a loading force of 0.98 N, our test gave an average Vickers hardness of 45 GPa. The

Synthesis of Ultra-Incompressible Superhard Rhenium Diboride at Ambient Pressure

Rhenium diboride (ReB2), synthesized in bulk quantities via arc-melting under ambient pressure, rivals materials produced with high-pressure methods in properties and may find applications in cutting when the formation of carbides prevents the use of traditional materials such as diamond.