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| Abstract No.: |
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Scheduled at:
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Wednesday, May 04, 2022, Hall D 4:35 PM
Young Professionals Session
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| Title: |
Moving towards more sustainable approaches for protecting surfaces against wear
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| Authors: |
Kaveh Torkashvand* / University West, Sweden
Shrikant Joshi / University West, Sweden
Mohit Gupta/ University West, Sweden
Stefan Björklund/ University West, Sweden
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| Abstract: |
WC-based metal matrix feedstock materials are one of the most popular candidates to be processed as wear resistant coatings employing thermal spray technology. Conventionally, cobalt has been widely used as binder to provide physical support for WC particles. However, there have been some environmental, supply and economic concerns around Co which makes it urgent to seek possibilities to reduce the usage of this element. Consequently, one approach is to search for more sustainable binder chemistries for WC-based coatings. Another approach could be to reduce coating thickness. Reducing coatings’ thickness to 50 µm can significantly reduce usage of Co as material feedstock and can be considered as a mid-term solution towards sustainability. High velocity air fuel technique is expected to be the ideal technique to achieve thin and extremely dense coatings by employing fine powders. This can pave the way for fabrication of the WC-based coatings with reduced thickness (from 200 µm down to 50 µm) that still could potentially show comparable performance as the conventional thicker coatings. In this study wear performance of WC coatings produced by HVAF with four alternative binders as well as WC-CoCr coatings with reduced thickness will be discussed. By employing alternative binders with less or no Co in their composition, which show comparable performance compared to Co, the usage of this element is possible to be significantly reduced or even totally eliminated.
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