Graded grain size diamond layer

The invention relates to diamond coatings and the growth of diamond coatings suitable for tools, wear parts, and the like. The invention produces polycrystalline coatings having progressively finer grain size in the direction of the outer surface, which enhance the wear resistance and finish charact...

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Bibliographische Detailangaben
1. Verfasser:	ZIMMER JERRY W
Format:	Patent
Sprache:	eng
Schlagworte:	GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GRINDING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS POLISHING TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TOOLS FOR GRINDING, BUFFING, OR SHARPENING TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention relates to diamond coatings and the growth of diamond coatings suitable for tools, wear parts, and the like. The invention produces polycrystalline coatings having progressively finer grain size in the direction of the outer surface, which enhance the wear resistance and finish characteristics of the parts and tools. In one embodiment, chemical vapor deposition grows a first region over a substrate with a plurality of nucleation sites and the first region transitions into polycrystalline diamond grains growing progressively smaller to an average grain size of less than three microns.