After synthesizing, I need to measure the mechanical properties of nano-powders. Does anyone know how mechanical properties (e.g hardness, toughness) are measured in nano powders?
You can measure powder rheology on FT4 instrument (Freeman Technology) at defined normal stresses.
Tank you so much Prof. Lubomir Lapcik .
Please let me know, how much the quantity of powders are required to test by powder rheology
There are 3 volumes of sensors: 250 ml, 25 ml and the smallest one 1ml.
In our lab, the nano indenter is existent . May I know, whether hardness can get from this machine. The issue is only, what pressure is need to make a bulk.
Yes, you can measure hardness by using nanoindenter.. ...just google "hardness nanoindentation" , you will get hundreds of papers.
Dear Sridhar,
Do you think, measurement is possible when the raw materials are as powders . No need to press to make a bulk.
From nanoindentation, hardness and Young's modulus can be obtained. The data can also be processed to obtain yield strength and work-hardening coefficient. However, does anyone have any idea if it is possible to measure ductility or toughness using nanoindentation.
Dear Harpreet.
I am looking the paper/standard showing necessary pressure for making solid formation e.g. bulk from the nano powders
In what kind of powders are you trying get the mechanical properties? Once you press them to form a bulk materials you will change their properties, so you will need to define the final preform to measure the mechanical properties and apply the required pressure to get different green densities. If it is a ceramic or a metal, maybe you will need to sinter them, however, you will modify the the microstructure. In order to look at the mechanical properties, look at nanoindentantion and nanoimpact which are static and dynamic measurements wich will give you different mechanical properties
Dear Muniz Lerma
Thank you so much for your information.
The purpose of this research is determine of mechanical properties nano powders (carbide titanium) as-synthesized.
You can use DMA for mechanical properties with Materials pocket to hold the sample. See the attachment below. Hope it will work for you.
http://www.perkinelmer.com/CMSResources/Images/44-74202APP_MaterialPockets.pdf
http://www.int.kit.edu/mechanicalproperties.php
see this link
best regard
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