Montross
Charles Stefan Montross, Springs ZA
Patent application number | Description | Published |
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20130205678 | POLYCRYSTALLINE SUPERHARD MATERIAL - A method for making polycrystalline superhard material comprises providing an electrically conductive substrate defining at least one deposition surface, electrophoretically depositing charged superhard particles or grains on to the deposition surface(s) of the substrate to form a pre-sinter body, and subjecting the pre-sinter body to a temperature and pressure at which the superhard material is thermodynamically stable, sintering and forming polycrystalline superhard material. There is also disclosed a superhard wear element comprising a polycrystalline superhard material produced by such a method. | 08-15-2013 |
Charles Stephan Montross, Nuffield Springs ZA
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20100287845 | POLYCRYSTALLINE DIAMOND COMPOSITES - The invention is for a polycrystalfine diamond composite material comprising intergrown diamond particles and a binder phase, the binder phase comprising a tin-based intermetallic or ternary carbide compound formed with a metallic solvent/catalyst. The invention extends to a polycrystalline diamond abrasive compact comprising such a composite material and to a tool insert comprising such a diamond abrasive compact. | 11-18-2010 |
Charles Stephan Montross, Springs ZA
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20100050536 | MATERIAL CONTAINING DIAMOND AND AN INTERMETALLIC COMPOUND - THIS INVENTION relates to a method of making a diamond containing material comprising diamond particles and a second phase containing an intermetallic compound comprising the steps of providing a reaction mass of reactants capable, on reaction, of producing carbon and an intermetallic compound and subjecting the reaction mass to diamond synthesis conditions. In an embodiment of the invention, the diamond containing material produced is polycrystalline diamond (PCD) and the reaction mass contains diamond particles in an amount sufficient to allow PCD to be produced. In a further embodiment of the invention, the diamond content in the diamond containing material produced does not exceed 70 volume %. | 03-04-2010 |
20100199573 | ULTRAHARD DIAMOND COMPOSITES - The invention is for an ultrahard composite material comprising a diamond phase and a binder phase, the binder phase comprising a ternary carbide of the general formula Mx M′y C wherein; M is at least one metal selected from the group consisting of the transition metals and the rare earth metals, M′ is a metal selected from the group consisting of the main group metals or metalloid elements and the transition metals Zn and Cd, x is from 2.5 to 5.0, y is from 0.5 to 3.0 and z is from 0.1 to 1. The invention extends to a diamond abrasive compact comprising such an ultrahard composite material and to a tool comprising such a diamond abrasive compact. | 08-12-2010 |
20130326963 | POLYCRYSTALLINE DIAMOND MATERIAL - A polycrystalline diamond material comprising a mass of diamond particles or grains exhibiting inter-granular bonding and a binder material comprises a non-metallic catalyst material for diamond, the non-metallic catalyst material for diamond comprising at least one nitrogen compound derived from an ammonium compound and/or at least one halide compound. | 12-12-2013 |
Charles Stephan Montross, Gauteng ZA
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20140020823 | METHOD FOR ATTACHING A PRE-SINTERED BODY OF ULTRAHARD MATERIAL TO A SUBSTRATE - A method of attaching a body of superhard material to a substrate comprises placing a layer of a first brazing material on or over at least a portion of a surface of the substrate; the first brazing material having an associated melting temperature. A second brazing material is located between the first brazing material and a face of a pre-formed body of superhard material to form an assembly; the second brazing material having an associated melting temperature lower than the melting temperature of the first brazing material. The assembly is heated to a temperature sufficient to melt the second brazing material and bond the second brazing material to the superhard material and to the first brazing material. The heating temperature is then reduced to a temperature below the melting point of the second brazing material for a period of time to diffuse the second brazing material into the first brazing material to form a brazing mixture having a melting point greater than the melting point of the first brazing material and to form a bonded assembly of the superhard material and the substrate. | 01-23-2014 |