Methods of forming polycrystalline bodies using rhombohedral graphite materials
Inactive Publication Date: 2006-11-09
SUNG CHIEN MIN
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[0007] Accordingly, the present invention provides methods of improved efficiency for synthesizing superabrasive particles from a superabrasive precursor. The superabrasive precursor can include a source material distributed in a metal matrix. The source material can be a rhombohedral graphite source having a majority of carbon atoms oriented in a rhombohedral pol
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Further some shapes can allow use of various shoc
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[0020] A. Definitions
[0021] In describing and claiming the present invention, the following terminology will be used.
[0022] The singular forms “a,”“an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a carbon source,” or “the carbon source,” includes reference to one or more specific sources of carbon, and reference to “an extraction process” includes reference to one or more of specific processes for extraction.
[0023] As used herein, “rhombohedral graphite,” and “rhombohedral polytype graphite” may be used interchangeably, and refer to an allotropic form of graphite with an ABCABC stacking sequence of graphene layers. Rhombohedral graphite is well known in the chemical arts and is contained in the IUPAC Copendium of Chemical Terminology (2nd ed. 1997), which is incorporated herein by reference.
[0024] As used herein, “hexagonal graphite,” and “2H graphite” may be used interchangeably, and refers to an allotropic...
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Abstract
Methods of synthesizing polycrystalline bodies using rhombohedral graphite materials are disclosed and described. One procedure includes providing a particulate graphite source having a majority of carbon atoms oriented in a rhombohedral polytype configuration. The particulate graphite source can be shaped into a desired shape having a porosity from about 0% to about 30%. A sufficient amount of heat and pressure can be applied to the desired shape to form diamond and consolidate the diamond into a polycrystalline body.
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RELATED APPLICATIONS [0001] This application is a divisional application of U.S. patent application Ser. No. 10 / 900,037, filed Jul. 26, 2004 which application claims the benefit of U.S. Provisional Patent Application No. 60 / 490,170, filed Jul. 25, 2003, each of which are incorporated herein by reference in their entireties.FIELD OF THE INVENTION [0002] The present invention relates to methods for synthesizing polycrystalline bodies. Accordingly, this invention involves the fields of chemistry, materials science, metallurgy, and geology. BACKGROUND OF THE INVENTION [0003] The production of synthetic diamond is a process that has received much attention over the years and been sought for a variety of industrial applications. Today a number of diamond synthesis processes are known, several of which have been successfully commercialized. Examples of various diamond synthesis methods can be found in U.S. Pat. Nos. 2,947,611; 3,030,188; 3,238,019; 3,401,019; 4,377,565; 4,483,836; 5,209,91...
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