CORROSION RESISTANT CERAMIC

PROBLEM TO BE SOLVED: To provide a ceramic having a high corrosion resistance, which exhibits a high resistance to steam corrosion caused by high temperature steam at a high temperature range of ≥1,000°C and has a long service life. SOLUTION: In a corrosion resistant ceramic whose base body is mainl...

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Hauptverfasser:	HISAMATSU NOBORU, YURI ISAO, TSURUZONO SUKEZOU, FUKUTOME TAKEO
Format:	Patent
Sprache:	eng
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS ARTIFICIAL STONE BLASTING CEMENTS CERAMICS CHEMISTRY COMBUSTION ENGINES COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS ENGINE PLANTS IN GENERAL GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING LIME, MAGNESIA MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES REFRACTORIES SLAG STEAM ENGINES TREATMENT OF NATURAL STONE WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a ceramic having a high corrosion resistance, which exhibits a high resistance to steam corrosion caused by high temperature steam at a high temperature range of ≥1,000°C and has a long service life. SOLUTION: In a corrosion resistant ceramic whose base body is mainly formed from at least one kind of silicon nitride, silicon carbide and sialon and which has a surface layer provided on its surface, the surface layer comprises zirconium oxide stabilized with an element of group IIIa of the Periodic Table, contains Al and Si in an amount of ≤1% in total, and has a thickness of 5 to 200 μm and a porosity of 5 to 30%. COPYRIGHT: (C)2003,JPO