Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A method of forming a super hard polycrystalline construction comprises forming a liquid suspension of graphene and grains of super hard material, dispersing the graphene and super hard grains in the liquid suspension to form a substantially homogeneous suspension which is dried and from which a pre-sinter assembly is formed and then treated to create a sintered body of polycrystalline super hard material comprising a first fraction of super hard grains and a second fraction of diamond grains, the graphene being at least partially converted to diamond during the sintering stage to form the second fraction. The super hard grains in the first fraction are bonded along at least a portion of the peripheral surface to at least a portion of a plurality of diamond grains in the second fraction, and have a greater average grain size than that of the grains in the second fraction which is between 60 nm to 1 micron.
A method of forming a super hard polycrystalline construction comprises forming a liquid suspension of graphene and grains of super hard material, dispersing the graphene and super hard grains in the liquid suspension to form a substantially homogeneous suspension which is dried and from which a pre-sinter assembly is formed and then treated to create a sintered body of polycrystalline super hard material comprising a first fraction of super hard grains and a second fraction of diamond grains, the graphene being at least partially converted to diamond during the sintering stage to form the second fraction. The super hard grains in the first fraction are bonded along at least a portion of the peripheral surface to at least a portion of a plurality of diamond grains in the second fraction, and have a greater average grain size than that of the grains in the second fraction which is between 60 nm to 1 micron.
Super hard constructions & methods of making same
DONG WANG (Autor:in)
07.06.2017
Patent
Elektronische Ressource
Englisch
IPC:
B22F
Verarbeiten von Metallpulver
,
WORKING METALLIC POWDER
/
B23P
Sonstige Metallbearbeitung
,
OTHER WORKING OF METAL
/
B24D
TOOLS FOR GRINDING, BUFFING OR SHARPENING
,
Werkzeuge zum Schleifen, Polieren oder Schärfen
/
C01B
NON-METALLIC ELEMENTS
,
Nichtmetallische Elemente
/
C04B
Kalk
,
LIME
/
C22C
Legierungen
,
ALLOYS
/
E21B
EARTH OR ROCK DRILLING
,
Erd- oder Gesteinsbohren