Method of processing a body of polycrystalline diamond material

A method for leaching a polycrystalline diamond (PCD) cutter element having a non-diamond phase comprising a solvent catalyst material, the method comprising: introducing a volume of liquid acid leaching mixture into a leaching receptacle; attaching the PCD cutter element to a fixture; applying a se...

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Bibliographische Detailangaben
Hauptverfasser:	Carmen Elena Zvoriste-Walters, Jonathan James Biddulph, David William Aldmington, David Thomas Ford
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS ARTIFICIAL STONE CEMENTS CERAMICS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DIFFUSION TREATMENT OF METALLIC MATERIAL FERROUS OR NON-FERROUS ALLOYS GRINDING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIME, MAGNESIA METALLURGY MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHING REFRACTORIES SLAG THEIR RELEVANT APPARATUS TOOLS FOR GRINDING, BUFFING, OR SHARPENING TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	A method for leaching a polycrystalline diamond (PCD) cutter element having a non-diamond phase comprising a solvent catalyst material, the method comprising: introducing a volume of liquid acid leaching mixture into a leaching receptacle; attaching the PCD cutter element to a fixture; applying a seal member around the PCD cutter element; locating the fixture in the leaching receptacle to suspend the PCD cutter element above the acid leaching mixture; sealing the leaching receptacle to provide a closed system; elevating the temperature of the leaching mixture to a first temperature of between around 100°C to around 300°C to transition at least some of the leaching mixture to acid vapour(s); holding the temperature at said first temperature for a period of time whilst exposing the PCD cutter element to the acid vapour(s) to leach the PCD cutter element; and reducing the temperature to ambient temperature. The seal member may comprise an o-ring. The acid leaching mixture may have a molar concentration of between around 4M to around 9M and comprise hydrochloric acid (HCl), hydrofluoric acid (HF), nitric acid (HNO3), sulfuric acid (H2SO4), and/or phosphoric acid (H3PO4), and water. A polycrystalline diamond construction treated according the method is also defined.