Improvement of Plasma-Sprayed ZrO_2 Coatings by Cr_2O_3 Penetration and Evaluation of Cavitation Erosion(Physics, Processes, Instruments & Measurements)
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As plasma sprayed ZrO_2 coatings, like all ceramics coatings, include micro cracks and non-bonded part between flattened ZrO_2 particles, such properties as mechanical strength, wear resistance, cavitation erosion are greatly reduced. The possibility of improving the cavitation erosion of ZrO_2 coatings by penetration treatment with Cr_2O_3 was examined. It was found that the hardness of ZrO_2 coatings penetrated with Cr_2O_3 increased greatly, compared with as-sprayed ZrO_2 coatings. The evaluation of cavitation erosion of ZrO_2 coatings was investigated by magnetostrictive cavitation tests at a frequency of 20kHz and at a horn amplitude of 50μm.The cavitation erosion property was improved greatly by Cr_2O_3 penetration treatment of the ZrO_2 coating.
- 大阪大学の論文
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