Polycrystalline compacts including diamond nanoparticles, cutting elements and earth- boring tools including such compacts, and methods of forming same

US10279454B2 · kind B2 · utility

Assignees

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

Inventors

• Anthony A. DiGiovanni · Houston, US
• Roger William Nigel Nilen · Woodstock, GB

Key dates

• Filing date: Mar 15, 2013
• Grant date: May 7, 2019
• Expiry date: Oct 13, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/5454
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A polycrystalline compact includes a plurality of diamond grains of micron size, submicron size, or both, and a plurality of diamond nanoparticles disposed in interstitial spaces between the plurality of diamond grains. A method of forming a polycrystalline compact includes combining a plurality of micron and/or submicron-sized diamond grains and a plurality of diamond nanoparticles to form a mixture and sintering the mixture in a presence of a carburized binder to form a polycrystalline hard material having a plurality of inter-bonded diamond grains and diamond nanoparticles. Cutting elements including a polycrystalline compact and earth-boring tools bearing such compacts are also disclosed.