Respected researchers i am currently involved in making solid solutions of carbide powders.I am aware of calculations in weight percent.But a lot of publications are mentioning cermet composition in volume percent.
Please find the enclosed attachment.I am trying to guess their sample respective weights.
For e.g my sample of Nbc12Ni for a 25g samples in 3g Ni and 22g Nbc..In wt%?
I am curious about the calulations done in the article.
FOr eg a Cermet Nbc12Ni The binder volume is 12% and they have calculated weight percent as Nbc13.49Ni with Total density 7.92g/cm3(of the mixed unsintered powders i assume)
http://dx.doi.org/10.1016/j.ijrmhm.2017.03.012
Can someone explain how did they calculate?and how can i trace back to their sample composition in Grams?
Cermet Binder volume Composition wt% Total density
NbC12Ni10VC 12 Ni 10 VC NbC-13.85 Ni-7.40VC 7.72
NbC12Ni15VC 12 Ni 15 VC NbC-14.04 Ni-11.25VC 7.61
The significance of Vol% compositions in my thoughts are not a great measure because the powders have not been pressed yet.
Would be obliged if som1 can explain this calculation methodology.
Mass percentages are used when mixing a composition: you can weigh the component exactly and know how much mass percent of each component is in your mixture. Volume percentages are much less suitable for mixes. The opposite is the case when analyzing the finished material (regardless of whether it is melted, sintered or injected). For material analysis, cross sections are analyzed using optical microscopy or SEM. The finished image analysis gives a result in percent by volume. To compare whether your finished material corresponds to your mixture, you have to use a one unit: either you convert your mixture into volume percent, or the other way around, you convert the volume composition of the finished material into mass percent. In both cases you need the densities of the individual phases.
Dear Asad,
In the composites with a limited chemical interaction between the components volume percentage has the most important significance in comparison with molar and mass percentages. To find the volume fraction of a component you need to know its theoretical, usually measured by XRD, density. For refractory carbides, including mixed compounds, with the various compositions, you can find these data in Volumes II and III of my book on UHTM (please, see my ResearchGate account).
Regards,
Professor Igor L. Shabalin 111 Maxwell Building Materials & Physics Research Centre The University of Salford Manchester, M5 4WT, UK Tel.: +44(0)161 295 3621 Mobile: +44(0)7731 685544 [email protected] Skype Name: shbln50
Dear Asad Malik
The below-mentioned literature may be useful,
https://www.diva-portal.org/smash/get/diva2:9575/FULLTEXT01.pdf
Article Determination of the average grain size of cemented carbides
https://www.hindawi.com/journals/at/2016/5063274/
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