Ads
related to: extruded vs skived heat sink material properties examples
Search results
Results From The WOW.Com Content Network
Skiving machine producing copper heat sink fins. Skiving is also used for the manufacturing of heat sinks for PC cooling products. A PC cooler created by skiving has the benefit that the heat sink base and fins are created from a single piece of material (copper or aluminum), providing improved heat dissipation and heat transfer from base to fins.
The heat sink thermal resistance model consists of two resistances, namely the resistance in the heat sink base, , and the resistance in the fins, . The heat sink base thermal resistance, , can be written as follows if the source is a uniformly applied the heat sink base. If it is not, then the base resistance is primarily spreading resistance:
To create a tractable equation for the heat transfer of a fin, many assumptions need to be made: Steady state; Constant material properties (independent of temperature) No internal heat generation; One-dimensional conduction; Uniform cross-sectional area; Uniform convection across the surface area
A material property is an intensive property of a material, i.e., a physical property or chemical property that does not depend on the amount of the material. These quantitative properties may be used as a metric by which the benefits of one material versus another can be compared, thereby aiding in materials selection.
Aluminium is the most commonly extruded material. Aluminium can be hot or cold extruded. If it is hot extruded it is heated to 575 to 1100 °F (300 to 600 °C). Examples of products include profiles for tracks, frames, rails, mullions, and heat sinks. Brass is used to extrude corrosion free rods, automobile parts, pipe fittings, engineering parts.
It can also be moulded, extruded, skived, stamped, and hot and cold formed. Below is a table of properties pertaining to Rulon AR, but note that the other types of Rulon have similar properties. Below is a table of properties pertaining to Rulon AR, but note that the other types of Rulon have similar properties.
Generally, forced convection heat sink thermal performance is improved by increasing the thermal conductivity of the heat sink materials, increasing the surface area (usually by adding extended surfaces, such as fins or foam metal) and by increasing the overall area heat transfer coefficient (usually by increase fluid velocity, such as adding ...
The minimum amount of radius required to avoid any defect and problems depends on the extrudability of the material, as the material is more extrudable it can flow in corners with less radius. For example, for Aluminium, Magnesium and Copper alloys the minimum radius required for corners and edges is 0.75 mm whereas for ferrous metals for ...