Polycrystalline diamond compacts including at least one transition layer and methods for stress management in polycrystalline diamond compacts

US10350730B2 · kind B2 · utility

Assignee

• US Synthetic Corporation · US

Inventors

• David P. Miess · Highland, US
• Kenneth E. Bertagnolli · Riverton, US
• Damon B. Crockett · Mapleton, US
• Arnold D. Cooper · Mapleton, US

Key dates

• Filing date: Apr 7, 2014
• Grant date: Jul 16, 2019
• Expiry date: May 2, 2035

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16C2352/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Embodiments relate to polycrystalline diamond compacts (“PDCs”) that are less susceptible to liquid metal embrittlement damage due to the use of at least one transition layer between a polycrystalline diamond (“PCD”) layer and a substrate. In an embodiment, a PDC includes a PCD layer, a cemented carbide substrate, and at least one transition layer bonded to the substrate and the PCD layer. The at least one transition layer is formulated with a coefficient of thermal expansion (“CTE”) that is less than a CTE of the substrate and greater than a CTE of the PCD layer. At least a portion of the PCD layer includes diamond grains defining interstitial regions and a metal-solvent catalyst occupying at least a portion of the interstitial regions. The diamond grains and the catalyst collectively exhibit a coercivity of about 115 Oersteds or more and a specific magnetic saturation of about 15 Gauss·cm3/grams or less.