Applications of Field Emission Gun Scanning Electron Microscope (FEGSEM)

• Imaging –Grains, grain boundaries, their distribution in metals and alloys

• Dendrites, dendrite arms, their placings, coring in castings

• Study of inclusions, slags, oxides, second phase investigations in metals and alloys

• Indications of deformations in deformed materials (rolling, forging, extrusions)

• Study of fractured surfaces (in failure analysis, forensic investigations)

• Study of composites (reinforcement distribution, interface reactions, etc.)

• Study of nanomaterials, biomaterials, energy materials, water purification media

• Study of ores and minerals, concrete materials (concrete mixes, cements, reinforcement steels), etc.

• Study of tribological systems (wear, erosion, abrasion)

• Textures in materials, pole figure mapping

• Composition mapping (point, line and area) using EDS and WDS

• Cored structures in nanomaterials

• Remaining life estimation of expensive and high risk structures

• Study of functional materials (nanoparticles, nanofibers, films, reflective and magnetic coatings, etc.)

Important Note:

1) Submission of samples: Prior to minimum 1 day is mandatory, samples must be submitted before 4pm (Monday - Friday WD). Operator will not accept the samples which brought on the same date of analysis even if it is/was in the desiccator. Late submission of samples will not be considered.

2) Slot Date: Users whose sample required to be measured in particular date-period should inform operator post slot form submission, after assigning slot date request to postpone slot date will not be considered.

3) Slot Cancellation: User should inform the operator 3 working day before. Otherwise the slot will be cancelled & penalty will be imposed.

4) Slot Form: If Samples received via post without submitting signed form/ sample tagging, such samples will be discarded.

General Guidelines for FESEM Users

For the safety and longevity of FESEM at CRF, the following guideline are framed and users are expected to adhere to the same.
The samples will be rejected if the below instructions are not followed by the users.

The protocols to be followed are:

Preparation of any kind of sample is entirely the reposibility of users.

1. The samples should not should contain any acrylic/epoxy material.

2. Samples must be dry, free of moisture, free of oil and grease; Samples must be dessicated.

3. For Powder samples min. quantity 5mg, All analysis on non-mettalic and magnetic powder samples will be carried out below 3kV.

4. For solid (non-Degassing), size should be <= 1cm dimension per sample, height <= 1cm. if possible clean the sample with ethanol to remove oil and dust.

5. Since the current model of FESEM is not suitable for measuring biological samples (tissues, cells, etc). The CRF will not accept such samples.

6. Samples should not have any degassing species.

7. For Polymer and other non-conducting samples, analysis will be done @ < 4kV.

8. For Scratch/Tribo samples only 2 samples per slot is permitted.