Polycrystalline diamond

US11969860B2 · kind B2 · utility

Assignees

• Element Six Limited · IE
• Baker Hughes Holdings LLC · US

Inventors

• John H. Liversage · Randburg, ZA
• Danny E. Scott · Conroe, US
• Humphrey Samkelo Lungisani Sithebe · Springs, ZA
• Kaveshini Naidoo · Springs, ZA
• Bronwyn Annette Kaiser · Springs, ZA
• Michael Lester Fish · Randburg, ZA

Key dates

• Filing date: Sep 16, 2022
• Grant date: Apr 30, 2024
• Expiry date: Sep 16, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2237/61
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

An embodiment of a PCD insert comprises an embodiment of a PCD element joined to a cemented carbide substrate at an interface. The PCD element has internal diamond surfaces defining interstices between them. The PCD element comprises a masked or passivated region and an unmasked or unpassivated region, the unmasked or unpassivated region defining a boundary with the substrate, the boundary being the interface. At least some of the internal diamond surfaces of the masked or passivated region contact a mask or passivation medium, and some or all of the interstices of the masked or passivated region and of the unmasked or unpassivated region are at least partially filled with an infiltrant material.