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  • Vacuum Brazing of Aluminum Cold Plates and Heat Exchangers
    metal. The filler metal, also known as a braze alloy, is drawn into the closely mated parallel surfaces of the aluminum plates by capillary action. The attributes of the vacuum brazing process include uniform heating, tight temperature control, no post cleaning processes, and process repeatability.
  • Diff-Therm Technical Brief
    Vacuum diffusion pumps require an effective heating system to drive the pump. Conventional designs often employ a complicated series of components that must be carefully matched up, adding unnecessary time, labor, and cost to the replacement process.
  • PAT Provides New Insights Into Drying
    is suddenly in fashion. Solids, particularly blends and processed powders, have always challenged analytical chemists. Traditional analysis of drying and solvent operations through loss-on-drying involves removing samples and measuring how much mass is driven off through combined heating and vacuum
  • The Effect of Process Characteristics on Metal Fill and Defect Formation in Aluminum Lost Foam castings
    The process used to make the foam patterns generally involves two steps. The first step is pre-expansion in which the raw polystyrene beads are expanded to the desired bulk density. The expansion is accomplished by either heating the beads in vacuum, or by applying steam to obtain the desired
  • Dispelling 10 Myths About Nitrogen Reflow (.pdf)
    to wave soldering and even vacuum soldering. Let's start with the real reason assembly engineers use nitrogen in inert soldering: because it is the cheapest gas available that does not react with hot metal surfaces to form an unsolderable film. That's it. Period. People who use nitrogen for reflow
  • Low-Cost Electric Range Control Using a Triac
    eliminates these drawbacks. The PIC10F204, Microchip's 6-pin PICmicro (R) microcontroller (SOT-23 package), is used to implement this solution. The PICmicro gathers user inputs from a potentiometer and controls current to the heating element via a triac. This application note will discuss triac theory, so
  • Derating For Real World Conditions
    a self-heating effect in the bimetal element, known as I²R effect. Basically, the I²R effect is the amount of heat generated due to power losses when. current flows through the bimetal. The measurement of this lost power indicates. how freely or how impeded current flows through the various types
  • A Microfluidic System for Biological Particle Enrichment Using Contactless Dielectrophoresis
    fully integrated systems. Although iDEP provided an excellent solution to the complex. fabrication required by traditional DEP devices, it is difficult. to use for biological fluids. The high electric field. intensity used by iDEP produces undesirable results, such. as joule heating, bubble formation

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