Do you think that including nanodispersions or precipitates into materials matrix would result property improvement?
well I am having evidence that it will affect corrosion, wear as well as ductility.
our group made a number of heats of A356 and A390 alloys dispersed with ceramic particles. Repeatedly for many of the dispersed castings ductility increased by 50-100%.
nanodispersions are good at reducing oxygen in crystal latices...and hence better corrosion resistance. I'm doing a project on this issue at the moment. By having more uniform latices, most of the physical properties are enhanced as well.
That is a good piece of information. Nanodispersions giving better corrosion resistance. How do we go about nanodispersions? Thanks.
Hi Samer, thanks. when you say thickness of the coating will be better, what do you mean? more uniform? will it result in increase of thickness? how do we determine the right duration of ultrasonic technique? particle size analyser?
That is excellent Samer. Thanks a lot for the answers. Some journals wrote 1 hr. Also, the amplitude need to be adjusted as well right? The information that you have provided has been very useful.
Antonio can you please recommend a reference explaining this statement of yours? "nanodispersions are good at reducing oxygen in crystal latices"
The project turned out to be inconclusive. Nano dispersions had some...but not much corrosion resistance effects, we suspect more of a galvanic effect in the cases of failure. The goal of nano dispersion is to occupy gaps and voids in the the crystal lattice there by providing less room for gasses to permeate (H, O2, N2...etc) and become entrapped. Aside from the reasoning and chemistry, I haven't located a source to support this. I think some XRD to determine lattice constants and cell size would be useful in planning the size and abundance of the nano-crystals.
Thanks Antonio do you think it would be useful if I share my results with you for discussion? Where is your work or research place?
We are located in the Pittsburgh region of the USA. I don't know if it would be useful, as we don't delve into that type of research, but test new and developing technologies. However, I am curious and would enjoy discussion if you are willing to share.
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