HIGH-TOUGHNESS ZETA-PHASE CARBIDES

A ceramic material having a high toughness can include carbon and a transition metal. The transition metal can have an elemental body centered cubic structure at room temperature. A substantial amount of the ceramic can be of a rhombohedral ζ phase of the transition metal and carbon. These materials...

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Bibliographic Details
Main Authors SHANE VERHOEF, CUTLER RAYMOND A, SHETTY DINESH K, HACKETT KENNETH
Format Patent
LanguageEnglish
Published 24.11.2011
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
COMPOUNDS THEREOF
CONCRETE
INORGANIC CHEMISTRY
LIME, MAGNESIA
METALLURGY
NON-METALLIC ELEMENTS
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:A ceramic material having a high toughness can include carbon and a transition metal. The transition metal can have an elemental body centered cubic structure at room temperature. A substantial amount of the ceramic can be of a rhombohedral ζ phase of the transition metal and carbon. These materials can have a high thermal shock resistance, high fracture toughness, and good high temperature performance. A particulate mixture of a carbon source and a transition metal source can be assembled (12) and reacted (14) under high pressure and high temperature. The transition metal source can include a transition metal of a metal which has an elemental BCC structure at room temperature. The particulate mixture carbon to transition metal ratio is chosen so as to achieve a zeta phase carbide and processing is affected in order to retain the zeta phase at a substantial weight percent of the material (i.e. greater than about 5 wt %). The carbide ceramic can be cooled (16) and depressurized (18) to acquire the ceramic material.
Bibliography:Application Number: US200913000737