In today's Part 4, I sacrificed my personal Mo-Ra3 360 Pro in my lab to science simply because I needed space for something bigger. Yes, I admit that working radiators, which unfortunately can no longer be purchased new, could certainly have been sold at kleinanzeigen.de for a profit. But firstly, I don't normally do things like that, and secondly, curiosity was ultimately greater than the desire to maximize profit. Because since then, I have received many inquiries about this monster. Yes, it was a little disappointing, but don't worry about it. A cut-up is a cut-up, and it's easy to see where my curiosity came from.
With a total weight of 6.5 kg, the Mo-Ra3 360 Pro is more than just a brick, it's simply a challenge to your arms, hands, and cooling skills. But don't worry, today it's not about cooling, it's all about the inner workings. In other words, it's a kind of dissection of the body. It also requires a special welding process that does not use traditional solders such as tin or lead. But more on that on page two.
technical details
Is it brass or copper?
Of course, brass should not be demonized in general, and when it comes to purely thermal issues, copper should be praised as exclusively beneficial. A small amount of zinc increases stability and also allows for thinner ducts when this alloy is used to intentionally reduce wall thickness and reduce thermal resistance. And, given proper engineering, values slightly below those of copper can also be achieved with thicker walls. if you want to. Companies such as Hardware Labs have successfully reduced the size of structures over the years, while others simply use brass to reduce costs. Therefore, the devil always determines the details and what path a company ultimately chooses.
However, as I already wrote in the first part, everyday performance is not the subject of this series of articles, but the analysis of pure materials and the detection of prohibited substances. We also ask that anyone using these articles in the media pay close attention to the nuances, rather than simply summarizing the content in their own words, which may be misleading. In the case of lead, this is quite obvious and should be criticized without reservation.; With brass, you always have to look at the overall concept.
If you are not looking at it with purely German eyes, you should also be aware of the difference in meaning between copper and brass. Historically, in the English-speaking world, a distinction has really only been made between copper and aluminum radiators. Interestingly, the subtleties of distinguishing between brass and copper are of no interest to anyone out there, especially the marketing department. The respective public relations department must keep this in mind when creating such a website and translating it into German. But today we are talking about German products and the sensitivity of local target groups.
Test equipment for material testing, accuracy and test preparation
My Keyence VHX 7000 and EA-300 are used for materials testing and radiator measurements, allowing both accurate measurements of chemical elements and fairly accurate mass measurements. But how does it actually work? The laser-induced breakdown spectroscopy (LIBS) used in this article is a type of atomic emission spectroscopy that uses a pulsed laser to evaporate a portion of the sample. to generate plasma.
The radiation emitted by this plasma is then analyzed to determine the elemental composition of the sample. LIBS has many advantages over other analytical techniques. Only a small amount of sample is required for analysis, so damage to the sample is minimized. In today's article, the actual damage is being caused by my rather crude cutting and separating tools. This still completely new laser technology typically does not require special sample preparation for material analysis. Solids, liquids, and gases can also be analyzed directly.
LIBS can detect multiple elements in a sample simultaneously and can be used for a variety of samples including biological, metals, minerals, and other materials. It also enables true real-time analysis, which can save you a lot of time. LIBS typically does not require consumables or hazardous reagents, does not require vacuum like SEM EDX, and is also a relatively safe technique. Like any analytical technique, LIBS has certain limitations and challenges, of course, but it offers significant advantages for many of my applications, especially where speed, versatility, and minimally invasive sampling would be an advantage. Masu.
The first thing to point out is that the percentage results in the summary and tables are intentionally rounded to the whole percentage (wt%, or weight percent). This is probably because production variations can occur even within the same material. . Studies in the 1:1000 range are good, but are currently of no use when it comes to reliable assessment of non-trace elements. So RoHS even criticizes trace elements, but I intentionally searched only for lead in the percentage range. Further information regarding accuracy and methodology is provided below as a link to a separate article.
However, each day in the lab begins with the same steps. When you start, you'll work through a checklist you've created. This can take up to 30 minutes each time, but you'll have to wait until the laser warms up and the room reaches the right temperature anyway.
- Mechanical calibration of X/Y table and camera alignment (stitching, etc.)
- Camera white balance for all lighting equipment used
- Check the alignment of the LIBS optics and the standard lens, and adjust the alignment of the laser and proprietary optics (x300).
- Test a standard sample of the material to be measured and correct the curve if necessary (see image above)
Other articles in this series:
