Diwolframcarbid

Bezeichnung:Diwolframcarbid

CAS-Nr12070-13-2

Englisch Name:TUNGSTEN CARBIDE

CBNumberCB2174365

SummenformelCW2

Molgewicht379.69

MOL-Datei12070-13-2.mol

Synonyma

Diwolframcarbid

Diwolframcarbid physikalisch-chemischer Eigenschaften

Schmelzpunkt	≈2800°C
Dichte	17.15
Löslichkeit	insoluble in H2O
Aggregatzustand	Powder
Wichte	17.15
Farbe	Black
Widerstand (resistivity)	81.0 (ρ/μΩ.cm)
Wasserlöslichkeit	Soluble in nitric acid and hydrofluoric acid. Insoluble in water.
Crystal Structure	Hexagonal
Expositionsgrenzwerte	ACGIH: TWA 3 mg/m3 NIOSH: TWA 5 mg/m3; STEL 10 mg/m3
CAS Datenbank	12070-13-2
EPA chemische Informationen	Tungsten carbide (W2C) (12070-13-2)

Sicherheit

RIDADR	UN3178
TSCA	Yes
HazardClass	4.1
PackingGroup	III

Gefahreninformationscode (GHS)

TUNGSTEN CARBIDE Chemische Eigenschaften,Einsatz,Produktion Methoden

Chemische Eigenschaften
black hexagonal, a=0.29982 nm, c=0.4722nm; can be prepared by heating tungsten and carbon in the presence of hydrogen at high temperatures; hardness approaches that of diamond; brittle; used in hard metals, and as a 99.5% pure sputtering target to produce wear-resistant films and semiconductor films [KIR83] [CIC73] [CER91] [CRC10]
Physikalische Eigenschaften
Black. Resistant to oxidation in air up to 700°C. Corrosion resistant to Mo.
Verwenden
Tungsten carbide is used in industrial machinery, cutting tools, abrasives, armor-piercing rounds and jewelry. It is preferred even over stainless steel because of their incredible hardness and resistance to wear and tear. It is utilized for the manufacture of mill products including grinding and milling. It also includes tipping trekking, ski poles as well as cleats. It is mainly used in the form of cemented tungsten carbide.
Verwenden
Tungsten Carbide/Carbon (WC/C) is a black-gray colored coating of hard tungsten carbide particles in a soft amorphous carbon matrix. It is used for precision components with abrasive and adhesive wear, seizure problems (poor lubrication) and for dry machining applications.
Definition
Either of two carbides (W₂C and WC) produced by heating powdered tungsten with carbon. The carbides are extremely hard and are used in industry to make cutting tools or as an abrasive. WC has a very high melting point (2770°C) and will conduct electricity. W₂C also has a very high melting point (2780°C) but is a less efficient conductor of electricity. It is very resistant to chemical attack and behaves in a manner very similar to that of tungsten. It is strongly attacked by chlorine to give tungsten hexachloride, WCl₆.

Diwolframcarbid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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