Author: Kazuhisa MiyoshiPublisher:
ISBN:
Category :
Languages : en
Pages : 28
Book Description
Wear Particles of Single-crystal Silicon Carbide in Vacuum
Author: Kazuhisa MiyoshiWear of Single-crystal Silicon Carbide in Contact with Various Metals in Vacuum
Author: Kazuhisa MiyoshiPublisher:
ISBN:
Category : Auger effect
Languages : en
Pages : 36
Book Description
Wear of Single-crystal Silicon Carbide in Contact with Various Metals in Vacuum
Author: Kazuhisa MiyoshiPublisher:
ISBN:
Category : Auger effect
Languages : en
Pages : 36
Book Description
Sliding friction experiments were conducted in vacuum with single-crystal silicon carbide (0001) surface in contact with transition metals (tungsten, iron, rhodium, nickel, titanium, and cobalt), copper, and aluminum. The hexagon-shaped cracking and fracturing of silicon carbide that occurred is believed to be due to cleavages of both the prismatic and basal planes. The silicon carbide wear debris, which was produced by brittle fracture, slides or rolls on both the metal and silicon carbide and produces grooves and indentations on these surfaces. The wear scars of aluminum and titanium, which have much stronger chemical affinity for silicon and carbon, are generally rougher than those of the other metals. Fracturing and cracking along the grain boundary of rhodium and tungsten were observed. These may be primarily due to the greater shear moduli of the metals.
Friction and Metal Transfer for Single-crystal Silicon Carbide in Contract with Various Metals in Vacuum
Author: Kazuhisa MiyoshiPublisher:
ISBN:
Category : Friction
Languages : en
Pages : 36
Book Description
Wear of Single-Crystal Silicon Carbide in Contact with Various Metals in Vacuum
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781723302213
Category :
Languages : en
Pages : 26
Book Description
Sliding friction experiments were conducted in vacuum with single crystal silicon carbide (0001) surface in contact with transition metals (tungsten, iron, rhodium, nickel, titanium, and cobalt), copper, and aluminum. The hexagon shaped cracking and fracturing of silicon carbide that occurred is believed to be due to cleavages of both the prismatic and basal planes. The silicon carbide wear debris, which was produced by brittle fracture, slides or rolls on both the metal and silicon carbide and produces grooves and indentations on these surfaces. The wear scars of aluminum and titanium, which have much stronger chemical affinity for silicon and carbon, are generally rougher than those of the other metals. Fracturing and cracking along the grain boundary of rhodium and tungsten were observed. These may be primarily due to the greater shear moduli of the metals. Miyoshi, K. and Buckley, D. H. Glenn Research Center NASA-TP-1198, E-9360 RTOP 506-16
Friction and Metal Transfer for Single-crystal Silicon Carbide in Contact with Various Metals in Vacuum
Author: Kazuhisa MiyoshiFriction and Wear Behavior of Single-crystal Silicon Carbide in Contract with Titanium
Author: Kazuhisa MiyoshiPublisher:
ISBN:
Category : Mechanical wear
Languages : en
Pages : 34
Book Description
Friction and Wear Behavior of Single-Crystal Silicon Carbide in Contact with Titanium
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781723250170
Category :
Languages : en
Pages : 26
Book Description
Sliding friction experiments were conducted with single crystal silicon carbide in sliding contact with titanium. Results indicate that the friction coefficient is greater in vacuum than in argon and that this is due to the greater adhesion or adhesive transfer in vacuum. Thin films of silicon carbide transferred to titanium also adhered to silicon carbide both in argon at atmospheric pressure and in high vacuum. Cohesive bonds fractured on both the silicon carbide and titanium surfaces. The wear debris of silicon carbide created by fracture plowed the silicon carbide surface in a plastic manner. The friction characteristics of titanium in contact with silicon carbide were sensitive to the surface roughness of silicon carbide, and the friction coefficients were higher for a rough surface of silicon carbide than for a smooth one. The difference in friction results was due to plastic deformation (plowing of titanium). Miyoshi, K. and Buckley, D. H. Glenn Research Center NASA-TP-1035, E-9067 RTOP 506-16
Friction and Metal Transfer for Single-Crystal Silicon Carbide in Contact with Various Metals in Vacuum
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781723302152
Category :
Languages : en
Pages : 28
Book Description
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 and greater resistance to shear the metal has, with the exception of rhodium and tungsten, the less transfer to silicon carbide. Miyoshi, K. and Buckley, D. H. Glenn Research Center NASA-TP-1191, E-9307 RTOP 506-16
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