LNNano - Brazilian Nanotechnology National Laboratory

Operation and Training

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Operation and Training

Procedure for proposal submission

To carry out any experiment in the open facilities, users are required to be aware that their project shall go through the following stages:

– Proposal Submission: Users must fill out a form with all information required about the test they intend to carry out. It is important to remind that in this form users must make it clear which test procedures and parameters they wish to use, in order to make technical evaluation easier, which includes definition of test specimen geometry, heating and cooling rates used, deformation conditions and others.

– Proposal Analysis: Proposals will be analyzed from three perspectives:

a) Is it a test that cannot be carried out in another equipment?

b) Is it a test possible to carry out in the required equipment?

c) It is a feasible test?

If the proposal is accepted:

– Signature of a commitment statement: in this statement users undertake to publish their results in articles, dissertations, thesis and other public means. If the results are under confidentiality, i.e., results cannot be published by any reason, the research applicants must request a quotation for the performance of their research.

– Scheduling: it is reserved a period for user training and tests performance.

NOTE: Scheduling is done according to the availability of the equipment and facility manager.

– Execution: performance of training and tests.

– Evaluation: filling our of evaluation questionnaire of facilities used in user’s experiment.

– Submission of copies of scientific content generated with due acknowledgment to the use of facilities.

For the training and tests performances

On training day, users shall bring samples for preliminary tests, commitment statement signed by the applicant, high cost consumables, if any, and work plan, including defined test parameters.

Special Consumables

For the performance of tests on Gleeble, it is required the use of some consumables for temperature control, compression tests performance and others.

Consumables are separated into two categories: common consumables and high cost consumables.

Common consumables are: Type K thermocouples (Alumel/Cromel) for tests with maximum temperature up to 1,000 ºC, nickel paint used for compression tests.

High cost consumables are: Type S thermocouples (Platinum/Platinum-10%Rodium), used on high temperature tests (from -50 to 1,600 ºC), type T thermocouples (Copper/Constantan) used on very low temperature tests (from -270 to 400 ºC), and tungsten carbide supports and tantalum sheets, used in compression tests.

Laboratory provides low cost consumables and, if tests require high cost consumables, users must provide them. Below are some consumables suppliers:

Thermocouples – Omega: http://www.omega.com/

Other consumables: DSI – Susan: susan.castagnier@gleeble.com (Manufacturer of Gleeble Systems).

Samples for tests

Preparation of test samples and specimens for the performance of tests in any equipment is the user responsibility.

For the diffractometer, if the sample is a powder, the user must provide the appropriate sample holder. Once the sample holder is fixed in the support of the diffractometer, the base must be flat.

The test specimens for Gleeble must meet standards for each type of test. In specific cases, users may propose the use of their own specimen geometry, which must go through technical approval. If users wish to achieve high cooling rates, the ideal is that the Free Span does not exceed 10 mm.