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Toolmaking by Arc sprayed metal is a new field of Arc spraying application, a low cost, high efficiency method for producing molds for plastic products. Al- or Zn-based wires can only be used as spray materials at the present stage. In order to improve the anti-wear property of the Arc sprayed mold, the Ni layer is electron brush plated on the Arc sprayed coating to enhance the service life of the...
The Cu-15 vol.% Cr in situ composite is a promising material for the electrical contacts in high current devices, since it has an excellent combination of mechanical strength and electrical/thermal conductivity. The electrotribological behavior of Cu-15 vol.% Cr was studied using a modified pin-on-disk tester with an electrical current applied across the sliding interface. The Cu-15 vol.% Cr pins...
The tribological behavior of Cu-20%Nb and Cu-15%Cr in situ composites was studied on a pin-on-disk tester. Composite pins were slid against a hardened AISI 52100 steel disk under dry ambient conditions. Comparison of coefficient of friction, wear rate and bulk temperature was made between the two composites in terms of effects of normal pressure and sliding speed. Microstructural changes in the composites...
High quality silicon nitride ceramics have excellent high temperature strength, low density and excellent wear resistance due to their low friction. The combination of these properties makes silicon nitride an attractive material for rolling element bearing applications. The low density of the silicon nitride material has particular advantages when applied to the rolling elements of high-speed air...
A deformation-processed Cu 15vol.%Cr in situ composite was made by consumable are melting and casting followed by extensive deformation. A superior combination of mechanical strength and electrical/thermal conductivity was achieved with the composite since Cr filaments existed in the nearly pure copper matrix. The effects of sliding speed and normal pressure on sliding wear behavior and microstructure...
This paper presents the dry sliding wear behavior of deformation-processed Cu-20vol.%Nb in situ composite and the composite microstructure change during the sliding process. The composite was tested on a pin-on-disk wear tester with the composite pin rubbing against an AISI 52100 steel disk under dry ambient atmosphere. The effects of sliding speed, normal pressure, and thickness of subsurface deformation...
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