Superhard material comparable in hardness to diamond

Badzian, Andrzej R.
December 1988
Applied Physics Letters;12/19/1988, Vol. 53 Issue 25, p2495
Academic Journal
Superhard boron suboxides, with hardness close to that of diamond, were synthesized from boron/boron oxide mixtures. Such hardness is expected when a material’s molar volume approaches the value characteristic for diamond. These materials consist of boron-rich phases belonging to the boron-oxygen system. The phase which contains 4 at. % oxygen and a crystal structure related to β-rhombohedral boron can scratch diamond faces. During scratching of diamond the suboxide is worn also, and the wear debris is amorphized. Wear on the {100} diamond faces results from a cleavage mechanism which leaves a rough surface covered with cleaved {111} microfaces. The {100} faces are more easily abraded than the {111} diamond faces. Wear on {111} faces consumes much more energy and leaves grooves of plastically deformed diamond.


Related Articles

  • Rapid Communications: Air-stable, unoxidized, hydrocarbon-dispersible boron nanoparticles. Van Devener, Brian; Perez, Jesus Paulo L.; Anderson, Scott L. // Journal of Materials Research;Nov2009, Vol. 24 Issue 11, p26 

    Here we describe a simple method to produce boron nanoparticles with control over surface chemistry and dispersiblity in different solvents, with potential applications ranging from high energy density fuels to neutron capture therapy. The methodology should be adaptable to many hard materials;...

  • Treatments & Synthetics.  // JCK;2005 Reference Guide, Vol. 176, p46 

    Presents information on diamond enhancement and synthetic diamond detection. Use of magnification to see the porous appearance of the diamond's surface; Availability of two machines in detecting high pressure and high temperature of diamonds; Ways to locate laser/drill holes/tubes of diamonds.

  • Sintering of Fine Grained Polycrystalline Cubic Boron Nitride Compacts without Binder. Guoduan Liu; Zili Kou; Xiaozhi Yan; Li Lei; Duanwei He // Applied Mechanics & Materials;2014, Issue 665, p79 

    Cubic boron nitride (cBN) is a excellent super hard materials with superior mechanical properties that has been widely used in different industrial applications. Conventional cBN was sintered with binder in the cBN powder, and the binder affect the mechanical properties of cBN. Here we report...

  • Theoretical study of new superhard materials: B4C3. Gao, Faming; Klug, Dennis D.; Tse, John S. // Journal of Applied Physics;Oct2007, Vol. 102 Issue 8, p084311 

    The structural, energetic, mechanical, and elastic properties of B4C3 polymorphs have been predicted from first-principles calculations. Results that indicate α-B4C3, β-B4C3, and pseudocubic B4C3 can be stable at ambient conditions, and their hardness is comparable to that of cubic BN. In...

  • Diamond 2005. Breeding, Christopher M. // Gems & Gemology;2005, Vol. 41 Issue 4, p365 

    The article discusses the highlights of the 16th European Conference on Diamond, Diamond-Like Materials, Carbon Nanotubes, and Nitrides held from September 11 to 16, 2005 in Toulouse, France. Various presentations related to growth techniques, doping, superconductivity, optical characterization,...

  • Calculation of bulk modulus on carbon nitrides with chemical bond method. Zhang, Siyuan; Li, Huaiyong; Li, Ling; Zhou, Shihong // Applied Physics Letters;12/17/2007, Vol. 91 Issue 25, p251905 

    The bulk moduli of some superhard materials were calculated by using the chemical bond method. For simple crystals, such as diamonds, c-BN, SiC, Si, BP, and Ge, the calculated results agree with experimental and theoretical values. For crystals of complex structure, such as β-BC2N crystal and...

  • Sandvik Hard Materials, Diamond Innovations join forces.  // Nonwovens Industry;May2014, Vol. 45 Issue 5, p18 

    The article reports on the move of the Sandvik Hard Materials Ltd. to join forces with Diamond Innovations Inc. to form the new business, Sandvik Hyperion.

  • Sandvik Hard Metals Joins Forces with Diamond Innovations.  // Wire & Cable Technology International;May/Jun2014, Vol. 42 Issue 3, p30 

    The article reports on the merger of engineering firm Sandvik Hard Materials Ltd. and superabrasive materials manufacturer Diamond Innovations Inc. to form a business called Sandvik Hyperion which will offer polycrystalline diamond blanks and other related products.

  • X-ray beams change graphite into diamond and back again.  // Advanced Materials & Processes;Feb2004, Vol. 162 Issue 2, p21 

    Reports on the use of X-ray beams from the Advanced Photon Source in converting graphite to a carbon form as hard as diamond. Capability to induce the hard material to return to its previous soft state; Mechanism on how the graphite becomes harder using X-ray beams.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics