Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Leaching ultrahard materials by enhanced demetalyzation
The present disclosure relates to methods for enhanced demetalyzation of an ultrahard material, such as polycrystalline diamond (PCD) or cubic boron nitride (CBN), using a thiourea solution. The thiourea solution may contain thiourea and an acid, such as a Bronstead acid suitable for leaching. The thiourea may contain thiourea or a substituted thiourea, including tautomers thereof. The ultrahard material may be exposed to the thiourea solution for a time and under conditions sufficient to remove at least a desired amount of a metal, such as a catalyst used during formation of the PCD or CBN, from at least a portion of the ultrahard material.
Leaching ultrahard materials by enhanced demetalyzation
The present disclosure relates to methods for enhanced demetalyzation of an ultrahard material, such as polycrystalline diamond (PCD) or cubic boron nitride (CBN), using a thiourea solution. The thiourea solution may contain thiourea and an acid, such as a Bronstead acid suitable for leaching. The thiourea may contain thiourea or a substituted thiourea, including tautomers thereof. The ultrahard material may be exposed to the thiourea solution for a time and under conditions sufficient to remove at least a desired amount of a metal, such as a catalyst used during formation of the PCD or CBN, from at least a portion of the ultrahard material.
Leaching ultrahard materials by enhanced demetalyzation
WEAVER GARY E (Autor:in)
14.05.2019
Patent
Elektronische Ressource
Englisch
IPC:
C23G
CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
,
Reinigen oder Entfetten metallischer Werkstoffe durch chemische Verfahren, ausgenommen Elektrolyse
/
C01B
NON-METALLIC ELEMENTS
,
Nichtmetallische Elemente
/
C04B
Kalk
,
LIME
/
C21B
Gewinnung von Eisen oder Stahl
,
MANUFACTURE OF IRON OR STEEL
/
C22C
Legierungen
,
ALLOYS
/
C23F
Nichtmechanisches Entfernen metallischer Stoffe von Oberflächen
,
NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACES
Leaching ultrahard materials by enhanced demetalyzation
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Glassy route to ultrahard ceramics
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