What loosens up a test like this? That’s right, the atomization of the test object! Let’s look from the outside in. First, the outer shell, which I can certify to be pure aluminum. Of course under an oxide layer, which I have previously lasered away. It’s like a plastic surgeon. What is already shrinking must first be removed.
Next, we take a closer look at the inner case. A grooved structure has been incorporated, also to increase the surface for heat exchange. I’ll examine the upper shell as an example. The grooves are about 2 mm high and have a spacing of about 1 mm. This already gains a lot, after all. The half shells were cast and cleanly deburred, but there is no grinding of the upper edges at the seam of both shells.
The material is quite interesting, as it is not pure aluminum, but a special aluminum-silicon alloy designed to offer improved properties such as high tensile strength, improved castability, corrosion resistance and improved thermal conductivity. The primary elements in this alloy are aluminum (Al) and silicon (Si). The silicon content can vary depending on the application, but is typically between 5% and 15%. The addition of silicon greatly improves the castability of the aluminum, which facilitates the fabrication of complex shapes. These alloys generally have good thermal conductivity, making them suitable for applications that require efficient heat dissipation. Thus, we would already have two good reasons.
The pad used is very good average, so quite usable in composition. It just should have been made a bit thicker, but I’ll get to that in a moment. Let’s first look at the contents in this chapter:
It’s the usual mix of silicone as a binder and aluminum oxide, plus the organic-based purple coloring. I can’t measure that here, and it has nothing at all to do with the actual functionality. So the pad could have been green or pink. And thicker, but I’ll explain that to you after I turn the page.
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