Method of processing a body of polycrystalline diamond material

A method of processing a body of polycrystalline diamond (PCD) material having a non-diamond phase comprising a solvent catalyst material is described. The method includes leaching an amount of the solvent catalyst material from the body of PCD material by exposing at least a portion of the body of...

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Bibliographische Detailangaben
Hauptverfasser:	Carmen Elena Zvoriste-Walters, David William Aldmington
Format:	Patent
Sprache:	eng
Schlagworte:	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 DIFFUSION TREATMENT OF METALLIC MATERIAL EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS GRINDING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY MINING 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 OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PERFORMING OPERATIONS POLISHING TOOLS FOR GRINDING, BUFFING, OR SHARPENING TRANSPORTING
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Beschreibung
Zusammenfassung:	A method of processing a body of polycrystalline diamond (PCD) material having a non-diamond phase comprising a solvent catalyst material is described. The method includes leaching an amount of the solvent catalyst material from the body of PCD material by exposing at least a portion of the body of PCD material to a leaching mixture in aqueous or vapour form. The leaching mixture has a molar concentration of between 4M to 9M and comprises hydrofluoric (HF) acid, plus any one or more of hydrochloric (HCI) acid, nitric (HNO3) acid, sulfuric (H2SO,) acid, and/or phosphoric (H3PO2) acid and water. The molar concentration of the hydrofluoric (HF) acid and nitric (HNO3) acid may be at a molar concentration of 4M to 9M. The acid leaching mixture may comprise 13-20wt% hydrofluoric acid; 50-60wt% nitric acid and 20-40wt% water.