US 11,873,256 B2
Polycrystalline diamond with iron-containing binder
Antionette Can, Oxfordshire (GB); Xiaoxue Zhang, Oxfordshire (GB); Igor Petrusha, Kiev (UA); Alexander Osipov, Kiev (UA); Denis Stratiichuk, Kiev (UA); and Vladimir Turkevich, Kiev (UA)
Appl. No. 17/772,911
Filed by Element Six (UK) Limited, Oxfordshire (GB)
PCT Filed Nov. 26, 2020, PCT No. PCT/EP2020/083522
§ 371(c)(1), (2) Date Apr. 28, 2022,
PCT Pub. No. WO2021/115795, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 1918378 (GB), filed on Dec. 13, 2019.
Prior Publication US 2022/0348506 A1, Nov. 3, 2022
Int. Cl. C04B 35/528 (2006.01); B23B 27/14 (2006.01); C04B 35/634 (2006.01); C04B 35/645 (2006.01); C04B 37/00 (2006.01)
CPC C04B 35/528 (2013.01) [B23B 27/148 (2013.01); C04B 35/63436 (2013.01); C04B 35/645 (2013.01); C04B 37/001 (2013.01); B23B 2226/315 (2013.01); C04B 2235/3852 (2013.01); C04B 2235/425 (2013.01); C04B 2235/427 (2013.01); C04B 2235/604 (2013.01); C04B 2235/6567 (2013.01); C04B 2235/786 (2013.01); C04B 2237/363 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of producing a polycrystalline diamond (PCD) body, comprising the steps:
a. Forming a precursor binder mixture of FexN and graphite powders;
b. Adding the precursor binder mixture to a refractory cup in a layer;
c. Adding a diamond feed stock to the cup, adjacent to the precursor binder mixture;
d. Compacting the precursor binder mixture and diamond feed stock in the cup to form a green body;
e. Sintering the green body at a temperature of 1700° C. to 2300° C. and at a pressure of about 7 GPa, or higher for at least 30 seconds to form a sintered PCD body.