What is the best material for a heatsink?
What is the best material for a heatsink?
Heat sinks are designed to maximize the surface area in contact with the coolant fluid. Aluminum alloys are the most common heat sink material. This is because aluminum costs less than copper. However copper is used where higher levels of thermal conductivity are needed.
Is copper a good heat sink?
So, heatsinks play an important role in helping to cool them. You may be aware that aluminum is the most popular metal for heatsinks, but that copper is also sometimes used. You may also realize that copper has better heat conductivity.
Is copper a better heat sink than aluminum?
With natural convection air, the copper heatsink perform only marginally1 better (in °C/W) than aluminium. This is because the bottleneck isn’t in the transfer withing metal. When you have air with natural convection, the bottleneck is in the transfer between metal and air, and it’s the same for Al and Cu.
What metal are heat sinks made of?
A heat sink is usually made out of aluminium or copper.
Why are heat sinks made of aluminum and not copper?
The reason that aluminum is used in air cooler heat sinks is that it is lighter and the large surface area results in no significant advantage as the alum / air heat transfer rate differs little from copper to air.
Which is stronger aluminum or copper?
Copper is stronger than aluminium. It expands less but both materials have a similar maintenance schedule. Copper can carry almost twice the current capacity of aluminium, which makes them slightly smaller in size than aluminium wound transformers.
What is the thermal conductivity of copper heat sinks?
Skived copper heat sinks offer the maximum heat dissipation in applications that have high airflow and small space. The thermal conductivity of copper (~400 W/m-K) is the highest among all the commercial metals, and the skiving technology allows the heat sinks to have very thin fins, high aspect ratio and high fin density.
How is a skived copper heat sink made?
Skived heat sinks are manufactured by peeling fins from a bar of solid copper or aluminum, using a sharp and accurately controlled blade tool. The tool shaves a small thickness of the material, lifts it up and bends it vertically to form the fin. The final heat sink can be machined using normal fabrication techniques, such as CNC machining.
Which is the best type of heat sink?
When optimized to specific applications, skived copper heat sinks offer outstanding performance over any other thermal solutions within the small space. In some applications, the skiving technology is also the most cost-effective and reliable method of producing heat sinks that meet high thermal demands.