Thermal shock resistance with hexagonal boron nitride
Challenge
Thermal shock occurs when components or coatings are subjected to rapid temperature changes in short cycles, such as during preheating, contact with hot melts, or during restart processes. The abrupt temperature gradients generate high mechanical stresses on components, thereby posing a major risk to stability and quality in thermally stressed applications.
Consequence
Thermal shock leads to progressive damage to components: microcracks, spalling, and structural embrittlement compromise dimensional accuracy, service life, and equipment availability. In cyclic high-temperature processes, these effects continuously intensify and become a significant cost and production risk.
THE HENZE SOLUTION
Henze BNP’s hexagonal boron nitride offers a technically and economically compelling solution for applications involving extreme temperature fluctuations.
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Frequently Asked Questions
In which applications is the thermal shock resistance of boron nitride particularly important?
The outstanding thermal shock resistance is in demand across all industries, but particularly in metal casting and high-temperature furnace construction. In metal casting, it is used to produce durable crucibles, nozzles and molded parts that significantly increase the service life of tools and process reliability. In furnace construction, the material ensures reliability in the form of electrical insulation sleeves, heater supports or thermocouple protection tubes despite constant temperature changes..
How do Henze BNP boron nitride products perform under extreme temperature fluctuations?
Boron nitride products, especially our HeBoSint® materials, are inherently highly resistant to thermal shock. They can easily withstand sudden and extreme temperature changes without losing their structural integrity. This ensures efficient and absolutely safe process control, even when things get hot.
What causes high thermal shock stress in industrial processes?
Extreme temperature fluctuations are an inevitable part of nearly all high-temperature processes. Plant components and tools are usually heated up very quickly—often due to sudden contact with extremely hot media such as molten metal—and then cool down rapidly. These abrupt fluctuations place enormous stress on conventional materials and can lead to cracks or component failure.