Friction and metal transfer for single-crystal silicon carbide in contact with various metals in vacuum
Sliding friction experiments were conducted with single-crystal silicon carbide in contact with transition metals (tungsten, iron, rhodium, nickel, titanium, and cobalt), copper, and aluminum. Results indicate the coefficient of friction for a silicon carbide-metal system is related to the d bond character and relative chemical activity of the metal. The more active the metal, the higher the coefficient of friction. All the metals examined transferred to the surface of silicon carbide in sliding. The chemical activity of metal to silicon and carbon and shear modulus of the metal may play important roles in metal transfer and the form of the wear debris. The less active metal is, and the greater resistance to shear it has, with the exception of rhodium and tungsten, the less transfer to silicon carbide.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
- OSTI ID:
- 6377364
- Report Number(s):
- N-78-21294; NASA-TP-1191; E-9307
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360105* -- Metals & Alloys-- Corrosion & Erosion
ALUMINIUM
CARBIDES
CARBON COMPOUNDS
CHEMICAL BONDS
COBALT
COPPER
CRYSTALS
ELEMENTS
EROSION
FRICTION
IRON
METALS
MONOCRYSTALS
NICKEL
PLATINUM METALS
REFRACTORY METALS
RHODIUM
SILICON CARBIDES
SILICON COMPOUNDS
SLIDING FRICTION
TITANIUM
TRANSITION ELEMENTS
TUNGSTEN