Hard wurtzitic boron nitride polycrystals - suitable for cutting tools have improved plasticity and shock resistance

Polycrystals of wartzitic boron nitride are prepared by hot pressing a mixt. contg. as one of its components, boron nitride of wurtzite structure with a high proportion of defects, obtd. by use of a shock wave, together with at least 50 wt.% of graphitic boron nitride, also treated by shock wave but...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	S.S. DZHAMAROV, V.V. YAROSH, D.M. KARPINOS, V.P. ALEXEEVSKY, G.G. KARJUK, I.P. KOLOMIETS, A.V. KURDJUMOV, A.V. BOCHKO, M.S. PIVOVAROV, I.N. FRANTSEVICH
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS COMPOUNDS THEREOF CONCRETE INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS INORGANIC CHEMISTRY LIME, MAGNESIA METALLURGY NON-METALLIC ELEMENTS REFRACTORIES SLAG TREATMENT OF NATURAL STONE
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Polycrystals of wartzitic boron nitride are prepared by hot pressing a mixt. contg. as one of its components, boron nitride of wurtzite structure with a high proportion of defects, obtd. by use of a shock wave, together with at least 50 wt.% of graphitic boron nitride, also treated by shock wave but without becoming transformed, in the region of the boron nitride equilibrium diagram limited by the equilibrium curves of the graphite dense material transition and the wurtzite/cubic transition. The polycrystals although hard and suitable for cutting tools, retain sufficient plasticity to be less subject to shock damage.