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| Abstract No.: |
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| Title: |
Potential of suspension spraying for dense coatings with improved mechanical and chemical performance
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| Authors: |
Nicholas Curry* / Treibacher Industrie AG, Austria
Shrikant Joshi / University West, Sweden
Stefan Bjorklund/ University West, Sweden
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| Abstract: |
While much of the interest surrounding suspension spraying in recent years has focused on the production of thermal barrier coatings; suspension based coatings may have a far broader field of application when coatings with dense structure are produced. Applications such as yttrium oxide for plasma etching chambers or chrome oxide for the print and paper industry demand coatings with vastly different microstructures and properties compared to thermal barriers. Manufacturing of coatings using suspension plasma (SPS) or suspension HVOF spraying has demonstrated promising properties for the creation of coatings that have higher density and more refined structure than their powder produced counterparts. These new coatings have been characterised with improved performance in terms of hardness, chemical resistance, lower friction coefficient, erosion and wear resistance.
While preparation of standard oxide coatings such as Al2O3, TiO2 and Cr2O3 have been performed readily. Suspension feedstocks allow the production of multi-phase coatings were several different materials are incorporated to provide a functional performance; this fact can be taken further in the use of co-spraying of suspensions and powders to produce hybrid coatings. This paper will discuss the development of a number of coatings produced in this field
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