Molybdenum Disilicide

Name:
Molybdenum Disilicide
Detailed information:

M Formula:	MoSi2
Properties:
Dark-gray, crystalline powder. D 6.31 (20C), mp 1870–2030C. Not affected by air up to 1648C. Not attacked by most inorganic acids including aqua regia, but very soluble in hydrofluoric and nitric acids. Has high stress-rupture strength.
Derivation:
By fusion of hydrogen-reduced molybdenum with silicon.
Available Forms:
Cylinders, lumps, granules, powder, whiskers. May be coated on materials by vapor deposition and by flame-spraying.
Grade:
98%, 99.5%, mesh size 200 and 325.
Hazard:
Toxic material. TLV: 5 mg(Mo)/m3.
Use:
Electrical resistors, protective coatings at high temperatures, engine parts in space vehicles (molybdenum coated with molybdenum disilicide).