Cryogenic testing with liquid N2

  

Vinod Kumar
Published : May 8, 2023

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Cryogenic testing with liquid N2

Cryogenic testing is a critical process in many industries where materials and devices need to be tested at extremely low temperatures. This testing is typically done using liquid nitrogen (LN2) as a coolant, which can cool materials down to temperatures as low as -196°C.

Liquid nitrogen is often used as the coolant for cryogenic testing because of its low boiling point (-196°C), which allows it to rapidly cool materials and components to very low temperatures. Cryogenic testing with liquid nitrogen can reveal weaknesses or flaws in materials or components that may not be apparent at room temperature, and it can provide valuable information for improving the design of materials and components for use in low-temperature environments.

During cryogenic testing with liquid nitrogen, the material or component is typically immersed in a bath of liquid nitrogen or exposed to a flow of liquid nitrogen vapor. The temperature is then lowered to the desired level, and the material or component is held at that temperature for a specified period. The test may be repeated at different temperatures to evaluate the performance of the material or component across a range of temperatures.

The cryostat is then filled with liquid nitrogen, which rapidly cools the material or component to the desired temperature. The temperature is typically controlled using a temperature controller, which adjusts the flow of liquid nitrogen to maintain a constant temperature.

Cryogenic testing is used to validate the performance and reliability of materials and components in extreme environments. For example, aerospace engineers may use cryogenic testing to ensure that materials and components used in space vehicles will perform reliably in the cold vacuum of space.

Video 01: Cryogenic experiments with DS18B20 (liquid nitrogen test)

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