Engine Tests Thick Zirconia Coatings

The tests are performed in real engines because the transient conditions in the cylinder are affected by the coatings. The results have shown that the zirconia surface should preferably be sealed in order to obtain the benefit expected. The fact alone that zirconia coatings reduce the specific fuel consumption and increase the energy content of the combustion gasses gives indication of the possibility of reducing operational costs considerably more than only compensating for the coating costs. In addition, the coating reduces the thermal load on the components, which improves service life, particularly Where the combustion bowl design has thin surface sections.

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