APPLICATION OF ZIRCONIUM AND ITS COMPOUNDS IN THE MAKING OF HARD AND REFRACTORY ALLOYS

Journal Article · Sun Dec 31 23:00:00 EST 1961 · Primenenie Tsirkoniya i ego Soedin. v prom. Akad. Nauk Ukr. SSR, Inst. Obschch. i Neorgan. Khim., Materialy Soveshch., Kiev (1960)

OSTI ID:4171245

Koval'chenko, M S

A review is presented on the characteristics and applications of Zr compounds with C, B, N, and Si for hard, high melting point products with elevated high-temperature strength, high E, chemical inertness to both acids and alkalies, refractoriness in contact with molten metals, and high electric and thermal conductivity. The preparation of technical ZrC by carbon-black carbidization (ZrO/sub 2/ + 3C = ZrC + 2CO), that of pure ZrB/sub 2/ by borocarbide reduction of ZrO/sub 2/ (2ZrO/sub 2/ + B/sub 4/C= 2ZrB/sub 2/ + 4CO), that of pure ZrN by nitriding of metallic Zr powder at 1200 deg C, and that of ZrSi/sub 2/ by pressing Zr and Si powders in stoichiometric ratio and sintering at 1200 deg C in an Ar or H atmosphere are described in detail. Methods developed for hot pressing (simultaneous pressing and sintering) and by extrusion of mixtuxes of the powders with plastifiers (socalled friction-force pressing and sintering) are mentioned. A technology for the manufacture of ZrB/sub 2/ immersion thermocouples for use in steel, pig-iron, brass, and bronze melts is described, along with the high-temperature performance and thermal inertia of such thermocouples in steel-furnace tests. (TCO)

• Research Organization: Inst. of Powder Metallurgy and Special Alloys, Academy of Sciences, USSR
• NSA Number: NSA-18-000585
• OSTI ID: 4171245
• Journal Information: Primenenie Tsirkoniya i ego Soedin. v prom. Akad. Nauk Ukr. SSR, Inst. Obschch. i Neorgan. Khim., Materialy Soveshch., Kiev (1960), Journal Name: Primenenie Tsirkoniya i ego Soedin. v prom. Akad. Nauk Ukr. SSR, Inst. Obschch. i Neorgan. Khim., Materialy Soveshch., Kiev (1960)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACIDS
ALLOYS
ARGON
CHEMICAL REACTIONS
COMPACTING
ELECTRIC CONDUCTIVITY
EXTRUSION
FURNACES
HARDNESS
HEAT RESISTING METALS
HIGH TEMPERATURE
HYDROGEN
HYDROXIDES
MELTING POINTS
METALS, CERAMICS, AND OTHER MATERIALS
POWDER METALLURGY
PREPARATION
REFRACTORY ALLOYS
SILICIDES
SINTERING
TENSILE PROPERTIES
THERMAL CONDUCTIVITY
THERMOCOUPLES
ZIRCONIUM ALLOYS
ZIRCONIUM BORIDES
ZIRCONIUM CARBIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM NITRIDES