Since I get requests again and again, from which material what exactly consists and it is now possible for me with manageable effort to answer such questions, I start today retroactively just a new series of articles, which can be continued at will. No matter whether coolers, heatspreaders of CPUs, various pastes and pads, cables and connectors, case parts and much more – there are actually hardly any limits to the imagination. And because I just cleaned the part and want to store it again, the Raijintek Morpheus is my first test object today, even though I have already tested power supplies and cables. But you have to start with something. Of course you are still allowed to give me suggestions what you always wanted to know…
Ok, that’s the box up there, where the cooler is inside. We know it already. Now what is inside the cooler, please? So, before I finally pack it again, I punctured it once more, i.e. lasered it. PR usually tells you a lot, if the day is long enough. Whereby such a VGA cooler is still no real witchcraft, only a little bit…
And yes, I can spoil something in advance: It came out exactly what I suspected. But no matter – macro shots and precise analyses, also of the individual layers, are always nice to look at and to read. I quickly get myself another coffee and off I go, while further up things sweat about which I may write only soon that they exist at all. So there could be. Only you want to read something every day and I quickly go into amoeba mode. Measurement here, benchmarks above and in the end we are all smarter anyway – above and below. Only a little bit delayed…
And what do we do right now? The used 3D profilometer and the powerful microscope (max. x2000) are in the game and it’s also about material analysis for which I don’t have to use a SEM EDX elaborately. Vacuum? I don’t even need one for this and it saves a lot of time.
Some theory in advance
The laser-induced breakdown spectroscopy (LIBS) I am using now is a kind of atomic emission spectroscopy, where a pulsed laser is directed at a sample to vaporize a small part of it and thus create a plasma. The emitted radiation from this plasma is then analyzed to determine the elemental composition of the sample. LIBS has many advantages over other analytical techniques. Because only a tiny amount of the sample is needed for analysis, damage to the sample is minimal. This technique generally requires no special sample preparation. Even solids, liquids and gases can be analyzed directly. This is exactly what I could not do with the SEM EDX. I had to wash out all liquids before (vacuum!).
LIBS can detect multiple elements simultaneously in a sample and can be used for a wide range of samples, including biological, metallic, mineral and other materials. And you get true real-time analysis, which saves tremendous time. Because LIBS generally does not require consumables or hazardous reagents, it is a naturally relatively safe technique that also does not require a vacuum. As with any analytical technique, there are limitations and challenges with LIBS, but in many of my applications, especially when speed, versatility, and minimally invasive sampling are advantages, it offers distinct advantages. And that’s exactly why we’re going to make a cut and get to the practical stuff!
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