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HV hardness of plasma sprayed coatings

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Posted by Daniël Sellekaerts (62.72.109.13) on July 05, 2004 at 18:53:05:

Hi,
I have an additional question on the RE:HV hardness The plasma spraying can be up to...
When measuring HV of an AL2O3-ceramic coating, which load to you use? Our test results are approx. 900 HV with 25g. load. Greater loads results in coating cracks.
Can we link the max. load to the interparticles cohesion and the erosion resistence (a sort of Vickers cohesion test)? Can we convert the HV 25g. to HV 300g?
I hope to learn something more about HV quality control of Ceramics. Thank you for reply.

Follow Ups:

Re: HV hardness of plasma sprayed coatings Daniël Sellekaerts 16:59:26 07/06/04(0)
Re: HV hardness of plasma sprayed coatings Gordon England 01:32:13 07/06/04(1)

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