Gordon England Surface Engineering Forum



Effect of Sub-Micron particles and Oxides on HVOF

Posted by Ken Watson (70.89.207.161) on 13:31:35 07/03/06

Hello,
My company makes copper powder. We are trying to understand a few things about what makes a raw material "Good" for HVOF. In some limited discussions previously, we came to believe that very fine particles (say, -325 Mesh) were detrimental to the process. Is this the case? If so, why? Is there a percentage of these very small particles that are typically allowed?
Also, what is the effect of pre-existing oxidation on the powder particles on the HVOF process? I understand this can lead to problems as well.
Thank you in advance,
Ken


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