Page 42 - CFM_Newsletter_CY22

Service platform

We offer VIT residents and outside users a few characterization facilities to strengthen our collaborations
and fulfill the self-sustainable vision. One can access these facilities by contacting the person in charge.
For any queries, one can reach us at cfm@vit.ac.in.

Vicker's and Knoop Hardness Studies

It will be operated by putting a controlled force on the material's surface
over some time. After a particular indenter is pressed into the surface
under testing, the indentation resulting from it is measured, and the
software is also used to analyze and generate precise results. The test
is performed on a flat specimen with a polished or prepared surface for
high-accuracy measurement. The quality of the required surface is
dependent on the force used. In all tests, the indentation perimeter and
depth should be clearly defined when observed by the microscope.

Specifications:
Make and Model: Mitutuoyo-HB210
Indent: Diamond Indenter
Magnification: 10x and 50x
Load: 10 to 1000 kgf (load applied for 10 to 15 seconds)

Z-Scan Technique

The Z-scan technique is used to measure the non-linear optical properties
of materials. The Z-Scan helps determine the intrinsic photophysical
properties of materials by focusing a single laser beam onto the surface of
the materials sample. Usually, measurements need to be taken at different
laser pulse energies or laser pulse lifetimes to determine what non-linear
processes are present.

Specifications:

Laser Made: Coherent 640 OBIS
Laser wavelength: 640 nm
Software: Coherent connections
Z- Scan controller unit made: Holmarc
Maximum output power: 44 mW

CFM Newsletter Jan. – Dec. 2022 42 Vol – 2